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Home > Hardware Reviews > Optical Storage > DVD Recorders Double Layer

Thursday, December 22, 2005
Plextor PX-755A

1. Introduction

Having recently released the 750A, Plextor follows hot on the heels with the release of yet another 700 series model, the 755A. The Plextor PX-755A model drive is a typical Plextor drive, with all the well known functions enabled, including Q-Check. The drive supports all the max speeds found on most of the recent drives, while it supports up to 10X DVD+R DL writing speed. Note here that this review is the updated version of the Plextor PX-755A preview released a few days ago, and includes all the tests covering the capabilities of this drive.

Having said that, let us move on and have a look at the drive's main features and specifications...

- Features

AUTOSTRATEGY is a self-learning writing technology that determines the standard deviation of any blank disc and automatically optimizes the write strategy for unknown media, enabling high-quality disc recording. AUTOSTRATEGY technology is the culmination of five years of research and development by Taiyo Yuden, a leading Japanese supplier of quality CD and DVD recording media.

PlexEraser is a data destruction utility that makes a recorded CD-R or DVD disc unreadable. The drive will "re-record" over the Lead-in and data sectors of a write once disc rendering the disc data unusable. Initially this feature will support DVD+/-R and CD-R media. Firmware upgrades will add support for DVD+/-R DL media.

Plextor Optimized Writing Error Reduction Control (PoweRec) adjusts laser power and writing speed so they're at the optimum settings for that particular disc. Using real-time monitoring of the write data, PoweRec can increase or decrease write power and speed to guarantee the best possible writing quality with whatever brand media is used.

VariRec provides user adjustment of the recording power above or below a default level. The default level reflects an optimized laser power setting with reduced jitter. Changing this setting will result in a change of sound or sound quality and may increase the playability or compatibility with existing players.


The SecureRecording function lets you write on a CD-R disc and protect the data with a password. To view the contents of a password-protected disc (or even to see a catalog of files), the user must enter the correct password. The password can be entered with PlexTools Professional or with SecuViewer.

Buffer underrun proof

The buffer underrun proof technologies offer a solution that prevents writing failures during the burning process for CD and DVD media, by pausing the burn if the data to the drive write buffer is slowed or stopped. The drive resumes the burn process after the drive write buffer is refilled.

Silent mode

If the drive needs to be used in a quiet environment, the drive can be switched to silent mode. Unique technology that sets the drive for super-silent operation. By controlling access speed, read/write speed and tray opening and closing speed, you reduce drive noise to a whisper. This technology is excellent for recording studios or offices where low noise is required.


Enable reading CD-R media up to the maximum speed of the drive. Discs that may be damaged due to mishandling or improper use may shatter due to the higher rotational forces reached at the maximum read speed of the drive. The drive's maximum read speed is therefore limited as a safety function. SpeedRead enables the user to increase the read speed of the drive to the maximum possible. Plextor recommends examining each disc before enabling this function.


GigaRec lets you change the recording capacity of a standard CD-R disc from 70 percent up to 130 percent of its standard capacity. You can use GigaRec for CD-DA or data writing at 4X and 8X disc-at-once (DAO). The feature allows you to get that extra storage on a single disc for a larger project. For smaller projects, like an audio master, the feature enables you to use the entire capacity of the disc, increasing the size of the pits and lands for higher reproductive quality.


PlexTools Professional software provides a suite of diagnostic tests for blank and recorded media. The pre-recording tests of blank media allow you to choose the best media brands and recording parameters for your drive. The post-recording tests quantify the recording session and provide analyzer-type results to guarantee you're getting the best recording possible.

Write strategy creation

This function offers to create a new write strategy for your blank media. The drive will create a new write strategy in the AUTOSTRATEGY database without recording a disc. It is possible to create several write strategies for the same media, which can be useful if there is a quality difference among media with the same MID code.

- Specifications

Model Plextor PX-755A
Write Speed DVD+R 16X
CD-R 48X
Read Speed DVD-ROM 16X
Technical Specifications
Interface IDE/ATAPI
Data buffer 2 MB
Access Time <100ms (CD); <150ms (DVD)
Mean time between failures (MTBF) 60 000h
Disc Loading Tray (50.000 times)
Bezel replaceable Black bezel included in retail version
Digital Audio S/P DIF output
Dimensions 146 x 41,3 x 170 mm
Weight < 1Kg
Warranty 2 year Fast Warranty Service (in EU, Norway and Switzerland: Collect & Return)
1 year in other countries
System Requirements PC/AT compatible
CPU: Pentium 4 - 1.4 GHz
RAM: 256MB
HDD: 10GB free space
OS: Windows 98SE/Me/2000/XP
Compatible Formats DVD: DVD-ROM, DVD-Video, Multi-Border, Multi-Session, DVD+VR, DVD-VR, DVD+MRW (by firmware upgrade), DRT-DM
CD: CD-DA (CD-DA/CD+G/CD-TEXT), CD-ROM (Mode1/Mode2), CD-ROM XA (Mode2 Form1/2), Audio CD, Data CD, Photo CD, Video CD, CD-I, CD-I Ready, Mixed CD, CD-Extra, Multi-Session CD, Packet Write CD (Mount Rainier by firmware upgrade)), Bootable CD
Performance DVD+R 16x: 22.160KB/s (CAV), 12x: 16.620KB/s (PCAV) ,6x-8x: 8.310-11.080KB/s(PCAV), 6x: 8.310KB/s (CLV), 4x: 5.540KB/s (CLV), 2.4x: 3.324KB/s (CLV)
DVD-R 16x: 22.160KB/s (CAV), 12x: 16.620KB/s (PCAV) ,6x-8x: 8.310-11.080KB/s(PCAV), 6x: 8.310KB/s (CLV), 4x: 5.540KB/s (CLV), 2.4x: 3.324KB/s (CLV)
DVD+R DL 6x-10x: 8.310-13.850KB/s(PCAV), 6x-8x: 8.310-11.080KB/s(PCAV), 6x: 8.310KB/s (CLV), 4x: 5.540KB/s (CLV), 2.4x: 3.324KB/s (CLV)
DVD-R DL 6x: 8.310KB/s (CLV), 4x: 5.540KB/s (CLV), 2x: 2.770KB/s (CLV)
DVD+RW 6x-8x: 8.310-11.080KB/s(PCAV), 6x: 8.310KB/s (CLV), 4x: 5.540KB/s (CLV), 2.4x: 3.324KB/s (CLV)
DVD-RW 6x: 8.310KB/s (CLV), 4x: 5.540KB/s (CLV), 2x: 2.770KB/s (CLV), 1x: 1.385KB/s (CLV)
DVD-ROM 6-16x (CAV), 5-12x (CAV), 3-8x (CAV), 2-5x (CAV), 2x (CLV)
CD-RW 24x: 3.600KB/s (PCAV), 10x: 1.500KB/s (CLV). 4x: 600KB/s (CLV)
CD-ROM 20-48x (CAV), 17-40x (CAV), 14-32x (CAV), 10-24x (CAV), 8x (CLV), 4x (CLV)

Below are the main specs for the drive as given by NeroInfoTool and DVDInfoPro, VSO Inspector and Plextools Pro:

- Nero InfoTool

- DVD InfoPro

- VSO Inspector

- Plextools Professional

- The Drive

We received the bundled version of the drive, with no extra bezel or any accompanying software. For the purposes of this review, Plextor included a Plextools Pro latest version CD, with version 2.31 included, as the drive could not use its Q-Check functions with our latest Plextools Pro version, (v2.28). Regardless, the retail package contains several software programs, both full and trial, as indicated in the table below.

- Front panel view

- Rear panel view

- Label

We opened the drive to take a look at its internal mechanism. Note here, that by doing this, you void the warranty and so we strongly advise against it. Click on the image below for a larger, more detailed view of the drive internals.

Plextor has turned once more to the Sanyo chipset, after the short break with the 740 and 750 drives. The 755 uses an upgrade of the Sanyo chipset used in the 716A, the LC897496K, which according to Sanyo's official datasheet, offers DVD±R 16X, DVD ±RW 12X writing speed, DVD-ROM 16X reading speed, DVD-RAM 5X reading/writing speeds and 52X/32X recording speeds for CD-R and CD-RW media respectively. As we've seen from the drive's specs though, the 755 does not support any DVD-RAM functions and DVD-RAM will most probably be available in the 760 version.

- Installation

As already mentioned, the 755A came to our labs in its bundled version and with the latest firmware installed, version 1.00. The drive was installed as master under WinXP and was recognized as "Plextor DVDR PX-755A". Note that the PowerRec function can be disabled.

We compared the drive's results (reading-writing times) with the results of two other latest release drives with similar specs and performance, the LiteOn 1635s and the BenQ 1640.

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