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Appeared on: Wednesday, November 19, 2003
4x DVD±RW Roundup Vol.1 (Teac DV-W50D & Memorex Dual-X1)


1. Package, Installation - Teac DV-W50D

Teac DV-W50D and Memorex Dual-X1 - Page 1

 

- Teac DV-W50D

Teac's new DVD-Recorder is a multiformat drive supporting both DVD+R and DVD-R formats. The Teac DV-W50D takes the DVD writing to a new level by supporting maximum DVD+R and DVD-R writing speed at 4X. It also writes at 2.4X to DVD+RW and 2X to DVD-RW. Thus the new Teac DV-W50D plays DVD movies at the speed of 12X. The drive is capable of recording to CD-R media at 16X speed, rewriting to CD-RW media at 10X speed, combined with a higher read speed for CDs at 32X speed maximum. The TEAC DVD±RW drive utilizes an IDE/ATAPI interface for easy integration and upgrades.

- Drive features
Write Speeds
DVD
DVD+R: 4X CLV
DVD+RW: 2.4X CLV
DVD-R: 4X CLV
DVD-RW: 2X CLV
CD
CD-R: 16X CLV
CD-RW: 10X CLV (High Speed)
Read Speeds
DVD
DVD-ROM: 12X CAV
DVD-R/-RW: 6X CAV
DVD+R/+RW: 6X CAV
CD
32X CAV
Interface
IDE/ATAPI
Write Support
Track at Once, Disk at Once
Multi-Session and Incremental
EasyWrite (Mount Rainier) Supported
Read Support
DVD DVD-ROM(single/dual layer)
DVD+R,DVD+RW
DVD-R, DVD-RW
CD 8cm/12cm, Audio CD,CD-TEXT
CD-ROM Mode-1,Mode-2
(Form 1, Form 2)
CD-ROM XA, CD-R, CD-RW,
Video-CD, CD Extra/CD Plus,
CD-I, CD-DA, CD-ROM,
Write Verification
Optimum Power Control To Dynamically Adjust Laser Write Power
Access Time (Random Average)
DVD-ROM
160msec
CD-ROM
160msec
Data Buffer (size)
2Mbytes
Dimensions
5.83”(W) x 1.67”(H) x 7.78” (D)

Teac DV-W50D supports writing of all DVD-R/RW,DVD+R/RW and CD-R/RW media. The drive is using a 2MB data buffer to prevent buffer underun errors which may be occurred at the writing process.

Teac DV-W50D uses the RPC II region control allowing user to change the drive's region 5 times in total. For our tests, we set the region code to 2 (Europe).

The drive supports as a reader all CD and DVD recordable/rewritable discs except DVD-RAM and CD+G.

- The package

The European retail package includes the Teac DV-W50D drive, user's manual, safety notice, mounting screws, the usual internal audio cable and an IDE cable.

Thus it contains two blank discs, an 700MB Teac CD-R and a Teac DVD-R 4.7GB.

The package also includes softwares such as Intervideo WinDVD 4 for video playback, Pinnacle Studio V.8 for video editing /authoring and the most known Nero Burning Rom.

On the front panel of the drive there is the disc loading tray, the head phone jack and volume, the eject button, the emergency eject hole and the busy/write LED indicator. On the loading disc tray you can see the DVD-ROM logo in the middle of the tray and on the right side the ultra speed and RE-writable logos while the TEAC logo is placed on the left side of the tray.

On the rear panel there are the analog and digital output (SPDIF), the IDE connector, the device jumper configuration and the power input.

After removing the screws and taking off the top of the drive voids the drive's warranty. We make the attempt just for reference reasons. You can enlarge the image by clicking on it.

The main chipset belongs to the same series with this one of the Pioneer DVR-A06 DVD± RW recorder.

- Installation

The Teac drive was connected on IDE 1 of our test PC as "Master" and worked in Ultra DMA Mode 2 transfer mode.

The drive was identified as "TEAC DV-W50D" under WinXP.To make the reading/writing tests we used the firmware version 1.05.


2. Package, Installation - Memorex Dual-X1

Teac DV-W50D and Memorex Dual-X1 - Page 2

- Memorex Dual-X1

Memorex, is the famous provider of CD-R and CD-RW media. Its range of products includes a large selection of optical storage products, computer peripherals and accessories for both the private consumer and the professional user. The Memorex product line includes IT CD-R/RWs, floppy discs, Digital Audio CD-Rs, Mini Discs and Compact Flash/ Smart Media Cards. Its hardware portfolio includes the latest state-of-the-art CD-RW models and combination drives (DVD+CD-R/RW+CD-ROM), multimedia keyboards and accessories.

Memorex decided to enter the dual format DVD burner market with the new model Dual-X1. The drive parts are borrowed from the well known Pioneer DVR-A06 which means that Memorex has all the features for success. It is capable to write DVD-R and DVD+R at the maximum speed of 4X, DVD-RW at 2X, DVD+RW at 2,4X. The drive also supports CD-R writing at 16X and CD-RW at 10X. Apart from burner Memorex can play DVD-ROM at the maximum speed of 12X and CD-ROM at 32X. Bellow are all the burner's features thus our thorough test.

- Drive features

Dual Format Recording: Memorex supports both DVD+R/RW and DVD-R/RW discs.

Recording Speeds:

Buffer Memory: Memorex Dual-X1 is equipped with 2MB of buffer memory.

Buffer Underrun Protection: The drive features buffer underrun management system,to eliminate the possibility of buffer underruns errors.

Defect Management: The drive features the DRT-DM (Distributed Real Time Defect Management) system, to offer high reliability recorded discs.

High Precision Servo System: Imbalanced discs may cause vibration that affect performance at high speed reading and wirting.To prevent these vibrations the drive use the DRA technology which allows the precision servo system to remain stable at high speed recording and playback.

Smart Laser Drive Technology: The laser driver uses a pickup that incorporates a write strategy control circuit to ensure stable write performance.

Liquid Crystal Tilt Technology: The liquid crystal tilt mechanism provides accurate and reliable operation with discs that have been uneven curvature or thickness. This technology used during both reading and writing process.

Memorex DualX-1 supports as a reader all CD-Rom/R/RW discs except the CD+G . On the DVD format it doesn't supports DVD-Ram, all other DVD recordable/rewritable discs are readable. Memorex uses the RPC II region control, allowing user to change the drive's region 5 times in total. For our tests, we set the region code to 2 (Europe).

The supported writing formats are Disc At Once, Track At Once, Session At Once and Packet Writing

- The package

The retail package includes the internal DVD recorder, a quick start guide, installation map, mounting screws, IDE cable, audio cable , two blank Memorex DVD+R 4X and DVD+RW 2X media.

As for softwares the package includes Roxio's Digital Media Software Suite with Easy CD&DVD Creator 6, DVD Max player, PhotoSuite 5 and VideoWave Movie Creator.

By taking a look at the front panel of the drive, we are seeing that is black while the loading tray is white.The originate of the drive is easily identified by the Memorex logo which is placed on the left side of the tray. We can also remark the CD-RW, DVD+RW and DVD-Rom logos.

On the rear panel there are the analog and digital output (SPDIF) , the IDE connector, the device jumper configuration and the power input.

After removing the screws we can see the drive's internal design, an action which of course voids the drive's warranty. Clicking the follow image you can enlarge it for seeing the details.

The chipset of Memorex and Teac DV-W50D are of the same series.

- Installation

Memorex was connected on IDE1 of our test PC as "Master" and worked in Ultra DMA Mode 2 transfer mode. The drive was identified as "Memorex DVD+/-RW Dual-X1"under WinXP. To make the reading/writing tests we used the firmware version 1.05


3. Data CD Reading Tests

Teac DV-W50D and Memorex Dual-X1 - Page 3

Data CD Reading Tests

- Pressed CD results (CD Speed Graphs for Teac DV-W50D and Memorex Dual-X1)

Both drives support 32x CAV reading for CD-ROM/-R media. As we can see from the CD Speed results in the graph above both drives have approximately the same performance with the 80min pressed disc. The reported start reading speed was 15.04x for Teac and 15.01x for Memorex while the end speed was 33.03x and 33.97x respectively.

In the same task, the seek times for Teac are lower which means that is faster than Memorex. At the Random mode the difference wasn't very big but in the other two modes the 8ms difference is a considerable value.

- CDR Media results (CD Speed Graphs for Teac DV-W50D and Memorex Dual-X1)

With the 80min CD-R media the results are almost the same with the previous test. Both drives needed the same time to finish the task , with reported average speed 25.54X for Teac and 25.56X for Memorex.

In the graph above we can see the seek time for all modes of both drives with an 80min CD-R media. Teac is again a little faster than Memorex but not with great differences.

- HS-RW Media (CD Speed Graphs for Teac DV-W50D and Memorex Dual-X1)

For the RW reading test we used an Asus 4x-12X HS-RW media and Nero CDSpeed software. Ending the test we saw that the drives had similar performance results with a slight difference at the start speed which was 15.44X for Teac and 14.66 for Memorex. End and average speed was almost the same.


4. CD Error Correction Tests - Teac DV-W50D

Teac DV-W50D and Memorex Dual-X1 - Page 4

Error Correction Tests

Teac DV-W50D

In the following tests we checked the drive's behavior while was reading scratched / defected discs. The test discs we used was the ABEX Test Discs series from ALMEDIO.

- ABEX TCD-721R

Errors total
Num: 824276
Errors (Loudness) dB(A)
Num: 46309
Avg: -73.6 dB(A)
Max: -14.6 dB(A)
Error Muting Samples
Num: 2616
Avg: 1.1 Samples
Max: 40 Samples
Skips Samples
Num:2
Avg:6 Samples
Max: 6 Samples
Total Test Result
72.1 points (of 100.0 maximum)

Teac DV-W50D performed quite well. By taking a look in the graph we can see that most of the red spikes are approximately at -60dB(A). The reported average loudness error was -73.6dB(A) while the average error muting samples was 1.1, a level that is normal and far beyond from audible problems in the output signal, according to EAC author. The total score of the drive is 72.1, an assertive score.

- ABEX TCD-726

Errors total
Num: 10680
Errors (Loudness) dB(A)
Num:254
Avg:-63.9 dB(A)
Max:-12.0 dB(A)
Error Muting Samples
Num: 70
Avg: 36.5 Samples
Max:1185 Samples
Skips Samples
Num: 2
Avg:24.0 Samples
Max:24 Samples
Total Test Result
74.7 points (of 100.0 maximum)

The ABEX TCD-726 test disc contains defects and artificial fingerprints. Once again the drive performed very well, with the average loudness being at 63.9dB(A). The error muting samples was 36.5, an acceptable number.

- Summary

Test Disc
Reading Speed
Score
ABEX TCD-721R
Max
72.1
ABEX TCD-726
74.7
Average Score
73.4

Combining the two scores from the tests the Teac drive came off with an average score of 73.4/100 using the 721R and 726 Abex test discs.

- C2 Information accuracy

At the end of the procedure we used the ABEX TCD-721R test disc with NeroCdSpeed advanced DAE quality test . The results that we took are reporting a good score of 89.4/100 while, which is a very good score.

- CD-Check Audio Test Disc

The CD-Check Test Disc is a very useful tool for evaluating the Sound Reproduction / Error correction capabilities of a CD player. The disc offers a signal combination with disc error patterns to rate the drive's abilities to read music and reproduce it completely. Five tracks on the disc contain a sequence of progressively difficult tests. These tracks are referred as Check Level-1 through Check Level-5.

The files are reproduced (played) through a software multimedia player (i.e. Windows Media Player, PowerDVD). Each level is considered as passed, if the tone coming out from the speakers is smooth, continuous without interruptions, skipping or looping. The higher the Check Level passed, the more reliable the sound reproduction of the tested device.

Each file was played 5 times. A 5/5 score donates that the file was played flawlessly without problems.

Error Level
1
2
3
4
5
Teac DV-W50D
5/5
5/5
5/5
5/5
4/5

Teac DV-W50D successfully passed the first four Check Levels of the test. The fifth level includes an error size of 1.500mm which the drive ignored it 4 times out of 5. That means that the drive has a perfect sound reproduction and an excellent error correction.


5. CD Error Correction Tests - Memorex Dual-X1

Teac DV-W50D and Memorex Dual-X1 - Page 5

Error Correction Tests

Memorex Dual-X1

In the following tests we examined the error correction capabilities of the Memorex drive , while reading scratched / defected discs.The specific test discs are ABEX Test Discs series from ALMEDIO.

- ABEX TCD-721R

Errors total
Num: 873205
Errors (Loudness) dB(A)
Num: 48752
Avg:-72.9 dB(A)
Max: -13.6 dB(A)
Error Muting Samples
Num: 2809
Avg: 1.1 Samples
Max: 40 Samples
Skips Samples
Num:2
Avg:6.0 Samples
Max:6 Samples
Total Test Result
72.0 points (of 100.0 maximum)

Memorex Dual-X1 drive performed well with the 721R test disc, although the specific disc is always hard for drives to be read accurately. The average error loudness was -73.6dB(A), a result that according to EAC author is acceptable and does not lead to any audible problems in the output signal. There were a few muted errors but none skipped. The total test result of the drive is 72.0 points , almost the same with Teac's.

- ABEX TCD-726

Errors total
Num: 55197
Errors (Loudness) dB(A)
Num:2747
Avg:-71.2 dB(A)
Max:-48.5 dB(A)
Error Muting Samples
Num: 257
Avg: 1.0 Samples
Max: 2 Samples
Skips Samples
Num: 0
Avg: 0 Samples
Max:0 Samples
Total Test Result
82.3 points (of 100.0 maximum)

On this test the drive finished very fast and with less reading problem than Teac. The average error loudness with the 726 test disc was -71.2dB(A) while only few errors muted but none skipped. The total score of the drive is 82.3, a score which better than Teac's.

- Summary

Test Disc
Reading Speed
Score
ABEX TCD-721R
Max
72.0
ABEX TCD-726
82.3
Average Score
77.15

The Memorex gets an average score of 77.15 out of 100 at the reading error correction tests.

- C2 Information accuracy

Once again we used the ABEX TCD-721R test disc with NeroCdSpeed advanced DAE quality test for making the comparison between the two drives. This time the C2 Accuracy with the Memorex drive is 84.10%, which is a low percentage, and the quality score reaches the number of 91.1/100.

- CD-Check Audio Test Disc

The CD-Check Test Disc is a very useful tool for evaluating the Sound Reproduction / Error correction capabilities of a CD player. The disc offers a signal combination with disc error patterns to rate the drive's abilities to read music and reproduce it completely. Five tracks on the disc contain a sequence of progressively difficult tests. These tracks are referred as Check Level-1 through Check Level-5.

The files are reproduced (played) through a software multimedia player (i.e. Windows Media Player, PowerDVD). Each level is considered as passed, if the tone coming out from the speakers is smooth, continuous without interruptions, skipping or looping. The higher the Check Level passed, the more reliable the sound reproduction of the tested device.

Each file was played 5 times. A 5/5 score donates that the file was played flawlessly without problems.

Error Level
1
2
3
4
5
Memorex Dual-X1
5/5
5/5
5/5
5/5
4/5

Memorex Dual-X1 managed to pass the first four Check Levels of the test. At the fifth level, which includes an error size of 1.500mm, the drive performed very well giving audible clicks only once out of 5. The drive has also a perfect sound reproduction and an excellent error correction as the previous drive.


6. DVD reading tests

Teac DV-W50D and Memorex Dual-X1 - Page 6

DVD reading tests

- Single Layer DVD-ROM ( Teac DV-W50D and Memorex Dual-X1)

Both drives support 12X maximum reading speed for the DVD-Rom format. In the graph above we can see that the reported speed is almost the same for both of them in all modes.

Teac is little faster than Memorex in all modes. The differences are not very big except at the 1/3 mode where the two values differ for 7ns.

- Dual Layer PTP DVD-ROM (Teac DV-W50D and Memorex Dual-X1)

Teac and Memorex support 8X CAV reading for the dual layer DVD-ROM. The specific DVD-ROM disc is PTP. In PTP the two layers are read sequentially with the drive starting reading from the inner part of the disc, which is the beginning of each layer, towards the outer range, for each layer. Both drives use the same reading method and after the end of the test, as we can conclude from the photo above, the results we took are exactly the same.

From the seek time test, which we can see at the graph above, Teac is faster than Memorex in the first two modes. At full mode both drives have the same seek time.

- DVD Ripping Tests

We measured the DVD Ripping speed for both drives using the "Matrix" DVD Video title and the DVD Decrypter software.

Such Teac as Memorex are fast on the DVD-Ripping process and they needed the same time to finish the task.

- DVD Recordable/Rewritable Tests

The chart below shows the Nero CDSpeed results with the following media

Teac DV-W50D
Memorex Dual-X1
  DVD+R   DVD+R
DVD+RW   DVD+RW
  DVD-R   DVD-R
  DVD-RW   DVD-RW

According to the graph above we can see that both drives output exactly the same reading speed for the DVD-RW and DVD+R media.On the other hand the DVD-R and DVD+RW media were written at very similar speeds with Memorex being slightly faster.


7. DVD Error Correction Tests - Teac DV-W50D

Teac DV-W50D and Memorex Dual-X1 - Page 7

DVD Error Correction Tests

Teac DV-W50D

In the following tests we examined the DVD error correction capabilities of the Teac DV-W50D drive. For the tests we used CDVD Benchmark v1.21 and Nero CDSpeed . The reference test media comes from ALMEDIO.

- Single Layer media
ABEX TDR-821

This is a single sided, single layer DVD-ROM with a 4.7GB capacity, in which there are scratches with dimensions from 0.4 to 3.0 mm. The following transfer rate picture comes from CDVD Benchmark v1.21 transfer rate test.

Teac DV-W50D managed to finish the reading test without encounter any problem. The drive read the scratched disc fast and at the end of the test the reported speed was 13X. So the upshot is a great ability.

ABEX TDR-825

This is also a single sided, single layer DVD-ROM with a 4.7GB capacity. The data structure of the disc is exactly the same as the TDR-821, with the difference that there not scratches on it but defected areas with dimensions from 0.5 to 1.1 mm. There also fingerprints sized from 65 to 75 micrometers.

Again the test was completed without any read errors. During the procedure the reading speed was reduced from 10X to 5X on the fingerprint defected area, but after that the speed resumed and the test was finished successfully.

- Dual Layer media
ABEX TDR-841

This is a 8.5GB dual layer, single sided DVD-ROM disc with artificial scratches with dimensions from 0.4 to 3.0mm, in both layers.

The reading procedure began with the speed of 3.5X. At the end of the first layer the drive lower the speed in order to read the disc, an unreasonable event because the specific area wasn't defective. Eventually the test was finished without any reported problems.

ABEX TDR-845

The disc is a single sided, dual layer DVD-ROM disc with a capacity of 8.5GB. The only difference between the TDR-845 and the TDR-841 is that the first includes defected areas and fingerprints. The dimensions of the defected areas are ranged from 0.5 to 1.1 mm and the fingerprints are sized from 65 to 75 micrometers.

During the test the drive attribute smoothly without difficulties achieving the speed of 8X at the end of each layer. The reading process started at 3.5X.

ABEX TDV-541

The TDV-541 is a single sided, dual layer DVD-VIDEO disc, with capacity of 8.5GB. The disc is based upon the TDV-540 series which is designed for inspection and adjustment of DVD-VIDEO players. The discs check the layer switch operation from layer 0 to layer 1 and also include test pictures and test signals for DVD sound files. The current TDV-541 checks also the error correction capabilities of the drive and includes scratches from 0.4 to 3.0 mm.

The reading process started at 3.5X. The speed at the end of the first layer was 8X. That means that the drive didn't need slow down to read the effected area, which bypass without any reported problems.

ABEX TDV-545

The TDV-545 disc is based on the TDV-540 series. It is a single sided, dual layer DVD-VIDEO disc with a capacity of 8.5GB. The TDV-545 includes artificial black dots on the data surface, sized from 0.4 to 1.0 mm. It has also 65 - 75 micro meters fingerprints.

Black dots and fingerprints were not a problem for the drive. The speed at the end of the first layer is at 8X while the reported average speed is 6.17X. The test finished without any read errors.


8. DVD Error Correction Tests - Memorex Dual-X1

Teac DV-W50D and Memorex Dual-X1 - Page 8

DVD Error Correction Tests

Memorex Dual-X1

In the following tests we examined the DVD error correction capabilities of the Memorex DualX-1 drive. For the tests we used CDVD Benchmark v1.21 and Nero CDSpeed . The reference test media comes from ALMEDIO.

- Single Layer media
ABEX TDR-821

This is a single sided, single layer DVD-ROM with a 4.7GB capacity, in which there are scratches with dimensions from 0.4 to 3.0 mm. The following transfer rate picture comes from CDVD Benchmark v1.21. The reference test media comes from ALMEDIO.

The Memorex drive finished the reading test without any problems. During the reading of the scratched area there were no reported errors but right after that the speed decreased from 10X to 6X for an unaccountable reason. Anywise the procedure finished quite well and the performance was good.

ABEX TDR-825

This is also a single sided, single layer DVD-ROM with a 4.7GB capacity. The data structure of the disc is exactly the same as the TDR-821, with the difference that there not scratches on it but defected areas with dimensions from 0.5 to 1.1 mm. There also fingerprints sized from 65 to 75 micro meters.

The drive didn't face any problems to read the disc contents.The Memorex has to reduce from 10X to 5X the reading speed in order to read a specific defected area (fingerprint), but right after the speed increased once again to finish the test with success.

- Dual Layer media
ABEX TDR-841

This is a 8.5GB dual layer, single sided DVD-ROM disc with artificial scratches with dimensions from 0.4 to 3.0mm, in both layers.

Memorex Dual-X1 read the Abex 841 test disc fast without slowing down. No read errors were reported. The drive just ignored the defected areas.

ABEX TDR-845

The disc is a single sided, dual layer DVD-ROM disc with a capacity of 8.5GB. The only difference between the TDR-845 and the TDR-841 is that the first includes defected areas and fingerprints. The dimensions of the defected areas are ranged from 0.5 to 1.1 mm and the fingerprints are sized from 65 to 75 micro meters.

As in the corresponding test with the ABEX TDR-825 (defected single layer DVD-ROM), the drive had no problems to finish the task successfully. The reading speed was again set to 10X at the end of each layer.

ABEX TDV-541

The TDV-541 is a single sided, dual layer DVD-VIDEO disc, with capacity of 8.5GB. The disc is based upon the TDV-540 series which is designed for inspection and adjustment of DVD-VIDEO players. The discs check the layer switch operation from layer 0 to layer 1 and also include test pictures and test signals for DVD sound files. The current TDV-541 checks also the error correction capabilities of the drive and includes scratches from 0.4 to 3.0 mm.

After the end of the 541 test disc NeroCDSpeed reports that the average reading speed is at 5.57X. The drive slowed down at the beginning of the second layer from 8X to 6X and finished the task with speed at 2.76X. The test finished without any read errors.

ABEX TDV-545

The TDV-545 disc is based on the TDV-540 series. It is a single sided, dual layer DVD-VIDEO disc with a capacity of 8.5GB. The TDV-545 includes artificial black dots on the data surface, sized from 0.4 to 1.0 mm. It has also 65 - 75 micro meters fingerprints.

Memorex managed to pass the black dots and the fingerprints very easily. The test was successful, with an 6.18X average speed.


9. Protected CD Tests

Teac DV-W50D and Memorex Dual-X1 - Page 9

Protected CD Tests

We used CloneCD and 3 original CDs - Serious Sam 2 (SafeDisc 2), V-Rally 2 Expert (SecuROM 2) and NBA Jam Extreme (PSX) - in order to test the reading time of the drives. The following pictures show the drive reading/writing capabilities as CloneCD reports:
Teac DV-W50D
Memorex Dual X1

- PSX Pressed Media

For this test we used the PSX game 'NBA Jam Extreme' and we ripped the image to the HD with Alcohol 120%.Both drives needed the same time to finish the image making process.

- SafeDisc v.2

- SecuROM Results

As we can see from the graphs above both drives gave back almost the same time at the image making process. There is a small difference but not important at the third test, with the SecuRom protection, where Teac was a little bit faster than Memorex.

- Writing Tests

Both drives supports the DAO-RAW writing mode. For checking the drive's EFM correction status, we used 3 different game titles with different SafeDisc 2 versions and the latest software patches installed. We also used the drive as reader/writer at maximum reading/recording speed. The software we used after making the images was Alcohol 120% for the burning procedure, and we burned 3 discs/titles at the maximum speed with the Bypass EFM Error function enabled.

In the table below you can see whether the produced backups were working (game installed / played normally), or not.

Game Title
Burner
SD2 Build
Settings
ByPass EFM Error On
ByPass EFM Error Off
Max Payne v1.05
Teac DV-W50D
v.2.50.020
OK
OK
Memorex Dual-X1
OK
OK
Serious Sam - The Second Encounter v1.07
Teac DV-W50D
v.2.60.052
OK
NO
Memorex Dual-X1
OK
NO
The Sims - Unleashed
Teac DV-W50D
v2.80.010
OK
NO
Memorex Dual-X1
OK
NO

The produced backups with Alcohol 120% partially worked to the drives we tested. Unfortunately both drives cannot create working backups of the last two versions of SafeDisc 2. The SafeDisc v2.50 didn't seem to be a problem for the drives , as long as the "Bypass EFM error" feature is enabled. In other case, the backup does not work.


10. DAE Tests

Teac DV-W50D and Memorex Dual-X1 - Page 10

DAE Tests

- Pressed and CDR AudioCD results

In this test we examine the DAE speed of each drive. The reported average ripping speed with the pressed disc was 22.7X for Teac and 23X for Memorex. With CD-R media, the average ripping speed was 14.4X for Teac and 14.2X for Memorex.

- EAC Secure Extract Ripping mode

EAC reports that the Teac and Memorex supports "Accurate Stream" and "Cashing" features but gives a negative result for "C2 Error Info".

Teac DV-W50D
Memorex Dual X1

EAC's secure extract ripping mode results, which ensures maximum produced WAV quality. Note that for each drive we used the build-in detection function:

Tested Drives
Average DAE Speed (X)
Pressed
CDR
Teac DV-W50D
22.7
14.4
Memorex Dual-X1
23
14.2

- Advanced DAE Quality
Teac DV-W50D
Memorex Dual-X1

The quality score of both drives on the advanced DAE quality test is the absolute 100. The average speed of Memorex was 23.19X a bit higher than Teac's at 22.95X.

- 99mins AudioCDs

Tested drives
Ripping up to
Teac DV-W50D
93 min
Memorex Dual-X1
93 min

- Reading/Ripping Protected AudioCDs

For the test procedure we used 2 protected AudioCDs, which we tested in both recognition and ripping (with EAC) processes:

* Pressed AudioCD with Sony Key2Audio (Celine Dion - New Day Has Come)

* Pressed AudioCD with Cactus Data Shield 200 (Natalie Imbruglia - White Lilies Island)

Key2Audio
CDS200
EAC
Teac DV-W50D
OK
OK
Memorex Dual-X1
OK
OK

Both drives support reading/ripping of audio protected discs independently of the protection mode.


11. CD Recording Tests

Teac DV-W50D and Memorex Dual-X1 - Page 11

CD Recording Tests

We used the latest version Nero Burning Rom. Teac DV-W50D supports the 16x, 12x, 8x, and 4x Z-CLV writing speeds. The following screenshot comes from Nero CDSpeed writing simulation test with a blank 700MB CD-R disc. The drive starts writing at 16x and keeps this speed constant for the whole writing process, confirming the manufacturers specifications.

 

 

The following picture comes from Nero and illustrates all the available writing speeds for Teac.

Memorex Dual-X1 supports the 16x, 12x, 8x, and 4x CLV writing speeds.We used the same blank 700MB CD-R disc and we test the writing performance of the drive at maximum speed. The reported average writing speed was over 16X, which is accordant with the drive's specifications.

 

 

All the available writing speeds of Memorex are illustrated on the next screenshots from Nero.

- Recording Tests

We created a 80min data compilation in Nero Burning Rom burned it to a 700MB disc. Teac DV-W50D and Memorex Dual-X1 use CLV writing method. The reported burn time is almost the same at 329sec for Teac and 326sec for Memorex.

Below are Teac DV-W50D and Memorex Dual-X1 in all the available writing speeds during the burning of a 80min data compilation with Nero Burning Rom.

As we can see in the diagram above the difference between the two drives is very little. Memorex was a little faster than Teac for about 3-5 sec in all speeds.

- Other features

Tested Drives
Teac DV-W50D
Memorex Dual-X1
Overburning
Up to 83 min
Up to 83 min
CD text reading/writing
Yes
Yes

Both drives supports the Overburning and the CD text reading/writing features.

- HS-RW Writing Tests

We used Nero Burning Rom for writing CDs in the maximum RW speed. Both drives supports 24X rewriting speed.

According to the picture above Teac and Memorex once again having almost the same times with Teac to be only 3 sec faster than Memorex.


12. DVD Recording Tests

Teac DV-W50D and Memorex Dual-X1 - Page 11

DVD Recording Tests

- Writing Performance

Teac and Memorex drives support both DVD-R/RW and DVD+R/RW media formats. According to manufacturers specifications the two drives have the same recording speeds.

On the left we can see the DVD-R/RW recording speeds that both drive support.

 

In this screenshot are the DVD+R/RW writing speeds for both drives

DVD Recording Tests (max speed)
DVD-R
DVD-RW
DVD+R
DVD+RW
Teac DV-W50D
14:20
28:25
14:21
23:48
Memorex Dual-X1
14:21
28:29
14:25
23:49

The following pictures come from Nero, after successful burnings with both drives. The amount of data is the same for all the tests.

Teac DV-W50D and Memorex Dual X1 adjust the recording speed according to this one that is supported by the inserted blank DVD disc. In the following table you can see the maximum permitted writing speeds with various media, among with the writing times.

Disc Label
Disc Information
Writing Speed
Ritek 4x DVD-R
RITEKG04
4x
Pioneer 4x DVD-R
PVCR001002
4x
TDK 4x DVD-R
TTG01
4x
Memorex 4x DVD+R
RICOHJPN
4x
Sentinel 4x DVD+RW
SENTINELW01
2.4x
-DVD+RW Packet Writing Tests

Both drives support packet writing with DVD+RW and DVD-RW media. To test the performance with the DVD+RW format, we formatted a 4x DVD+RW disc by Ricoh and started the drag'n drop process, using an 412 MB file (412.822 KB). With the background formatting in full progress, we wrote down the reading / writing performance.

Average Writing
Average Reading
Teac DV-W50D
9:09 min / 0.55X
3:41min / 1.38X
Memorex Dual X1
9:14 min / 0.55X
3:44 min / 1.36X

As we can see from the table above both recorders performed almost the same and gave back approximately the same results. This is logical because the drives, as we mention before, are having the same main chipset.


13. 3T Jitter Tests - Teac DV-W50D

Teac DV-W50D and Memorex Dual-X1 - Page 12

Writing Quality Tests

Teac DV-W50D

We used Professional 80min 48X CD-R media and burned the same AudioCD project (with CD-Text) at 8X, 12X and 16X. Below you can see the 3T Pit & Land Jitter graphs.

- 3T Pit results

According to the diagram above we can see that the 3T Pit Jitter takes the maximum value at the speed of 16X (28ns). The value is getting lower while the speed reduces. No matter the speed was the Teac had very good results with very low jitter values far beyond the limit of 35ns.

The average 3T Pit Jitter values for all recording speeds are illustrated in the following table.

The speed of 12X had the better value, while the other two were also good. Excellent writing quality.

- 3T Land results

Teac had a very efficient 16X writing speed which archives the best performance from the other at 8X and 12X. The 27ns is an excellent value.

The average 3T Land Jitter values for all recording speeds are illustrated in the following table.

At the 12X speed we had the lower average jitter value while the highest was at the speed of 8X. Once again the results are very good.

- Summary
Recording Speed
3T Pit Jitter (ns)
3T Land Jitter (ns)
> 35ns
Max value (ns)

8X

24.37
26.95
No
26 Pit, 29 Land
12X
24.12
25.59
No
27 Pit, 29 Land
16X
26.00
26.27
No
28 Pit, 27 Land

The average 3T Pit and Land jitter values are below the 35nsec standard for all the recording speeds. The numbers we took are good enough to characterize Teac very good CD-R burner.


14. 3T Jitter Tests - Memorex Dual-X1

Teac DV-W50D and Memorex Dual-X1 - Page 13

Writing Quality Tests

Memorex Dual-X1

We used Professional 80min 48X CD-R media and burned the same AudioCD project (with CD-Text) at 8X, 12X and 16X. Below you can see the 3T Pit & Land Jitter graphs.

- 3T Pit results

As we can see from the graph above, the 3T Pit Jitter stays far below the 35ns RED book limit for all the available recording speeds. Memorex can burn CD with great quality.

The average 3T Pit Jitter values for all recording speeds are illustrated in the following table.

From the table above we confirming the quality performance of the drive.

- 3T Land results

The average 3T Land results are slightly increased in comparison with the previous measurements of the 3T Pit Jitter. The maximum jitter value was 31ns, in the beginning of the CD, which is a very good number. After that the values decreased again giving back more quality results.

The average 3T Land Jitter values for all recording speeds are illustrated in the following table.

Once again we can see in the table above how awful the drive performed. Memorex is an excellent CD recorder.

- Summary
Recording Speed
3T Pit Jitter (ns)
3T Land Jitter (ns)
> 35ns
Max value (ns)

8X

23.29
28.00
No
26 Pit, 31 Land
12X
23.02
26.10
No
24 Pit, 28 Land
16X
24.24
26.34
No
25 Pit, 27 Land

The average 3T Pit and Land jitter values are far beyond the 35nsec standard for all the recording speeds. Memorex had better 3T Pit jitter values than Teac while the 3T Land jitter values was almost the same for both drives.


15. PI/PO measurements - Teac DV-W50D

Teac DV-W50D and Memorex Dual-X1 - Page 14

KProbe PI/PO measurements

Teac DV-W50D

In the following screenshots you can see the PI/PO scans for various 4X DVD-R/+R and DVD-RW/+RW media, recorded with Teac DV-W50D at the maximum speed.

The software we used for the measurements is the KProbe, and the reader is LiteOn XJ-HD-165H. The specific methodology is very depended on the drive we use as a reader, and the reliability of the PI/PO provided output is also not technically confirmed. As a result, we cannot safely come up with absolute results, but we are allowed to compare the behavior of the drive with various DVD recordable/rewritable media.

The recordable discs we used come from Pioneer, TDK, Sentinel, Memorex and Ritek. More information about each disc type is available in the bottom of the page.

 

Media
Code
Memorex DVD+R
RICOHJPN
Pioneer 4X DVD-R
PVCR001002
Ritek 4X DVD-R
RITEKG04
TDK 4X DVD-R
TTG01
Pioneer DVD-RW
PVCW00V00245
Sentinel DVD+RW
SENTINELW01

The results revealed a good performance of Teac drive. The PI values are in the acceptable area, below 280 errors / second. The PO values could be better, considering that it should be zero.


16. PI/PO measurements - Memorex Dual-X1

Teac DV-W50D and Memorex Dual-X1 - Page 15

KProbe PI/PO measurements

Memorex Dual-X1

In the following screenshots you can see the PI/PO scans for various 4X DVD-R/+R and DVD-RW/+RW media, recorded with Memorex Dual-X1 at the maximum speed.

The software we used for the measurements is the KProbe, and the reader is LiteOn XJ-HD-165H. The specific methodology is very depended on the drive we use as a reader, and the reliability of the PI/PO provided output is also not technically confirmed. As a result, we cannot safely come up with absolute results, but we are allowed to compare the behavior of the drive with various DVD recordable/rewritable media.

The recordable discs we used come from Pioneer, TDK, Memorex and Ritek. More information about each disc type is available in the bottom of the page.

Media
Code
Ritek 4X DVD-R
RITEKG04
TDK 4X DVD-R
TTG01
Pioneer DVD-RW
PVCW00V00245
Sentinel DVD+RW
SENTINELW01

The performance of Memorex is familiar with Teac's. Again PI measurements were good but the PO values were increased.


17. Conclusion

Teac DV-W50D and Memorex Dual-X1 - Page 16

Conclusion

 

Pros

Cons

  • Dual format burners
  • 4x DVD±R writing
  • Complete retail packages
  • Excellent CD recording quality
  • Very good DVD error correction
  • Fast CD-R/RW/DVD-ROM/DVD±R/RW reading
  • Very good sound reproduction of defected AudioCD's
  • High CD/DVD error correction
  • Supports Key2Audio and CDS200 audio protections
  • Reasonably priced
  • Cannot create working backups with latest versions of SafeDisk protection
  • Does not support Mount Rainer
  • Increased DVD Seek times
  • 2x DVD-Video ripping
  • Low C2 accuracy

Teac DV-W50D and Memorex Dual X-1 are having almost the same performance, as they are "wearing" the same series of chipset. Of course that doesn't mean that the drives are the same. Generally the majority of the common users will not face up any problems in their daily tasks, although we found out some minor issues that their companies could improve through firmware upgrades.

The retail packages are almost complete, containing software for CD/DVD authoring and playback, as well as some useful utilities. However there are not enough included blank media. Teac has only a blank DVD-R and a CD-R media and Memorex a DVD+R 4X and a DVD+RW 2X blank media.

In the reading part, the drives support the 12X reading speed for DVD-ROM and 6X for DVD+R/+RW/-R/-RW formats. The drives were slightly faster in the corresponding tests, as it commonly happens with the latest drives.

Both drives have excellent CD writing quality with very low jitter values. However the C2 accuracy could be better. They can also playback and rip easily Key2Audio and CDS200 audio protections discs.

Teac and Memorex drives supports 4x burning speed on all the DVD-R and DVD+R media we tested, providing writing times less than 15 min for 4.38GB. The DVD error correction of both drives is very good; they managed to playback correctly all the defected DVD test discs without reporting any read problems. The DVD writing quality was acceptable with low PI values, while the PO error rate could be lower with some media.

The seek times for the CD and DVD formats were increased, in all tests the performance was below average. A firmware upgrade will probably solve the problem.

The ability to create working backups of the latest SafeDisc v.2 protected titles is limited for both Teac and Memorex drives. Software submission is required in order to produce working backups of SafeDisc v2.50 or higher.

Teac DV-W50D and Memorex Dual X-1 are two competitive drives with almost the same retail price at approximately $135~160. With decent performance and reasonable price, both deserve a position in your PC sleeves. However both companies have recently announced their new models at 8x DVD recording speed. The DVD recording market is currently very aggressive so the prices are expected to decrease as the competition rises.



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