755 Review (by HWP)

mhh, but the PX-755A is a 0 sheep burner :\, or on my systems is something wrong....

can we get confirmation on this? I was thinking of renouncing my hatred for plextor and considering a px760....

Is there a difference in sum1 scan graphs between the 716 and the 755?

any questions?

Someone else can confirm this?

if true. guess I won't be that interested in the 760 anymore.

No questions at all everything is very clear

Thank for the Review HWP you did a very good one.
I think I will stay with Lite-On can buy 2 for the price of one 755

The 'ct bashed the 755A badly in their latest review (mostly due to substandard writing quality) ... but they also pointed out that it isn't possible to read copy protected music CD's any more ...

Verbatim +RDL 2.4x (MKM 001 00)
PX-755a, FW 1.02
AS: Auto (did not create strategy, AS does not support DL)
Burn speed 6x CLV, no slowdown

Very good burn. Very similar quality to what i get from the 716. The 755 reads this with 8x and the 712 with 12x without problems. Beta/Jitter scan failed in the 755 at the layer break (Bug in Plextools?). So i scanned in the 712.

FE/TE, Burst, Sum1, Beta/Jitter, Read (755 and 712) scans:

Many thanks for the great review hwp , but would you say that going by the results you've seen yourself , would you say the PX-755A is as good as the PX-716A , your about the same ????

Nice review, hwp. Thanks!

Verbatim +RDL 8x (MKM 001 00)
PX-755a, FW 1.02
AS: Auto (did not create strategy, AS does not support DL)
Burn speed 8x P-CAV, no slowdown

This writing strategy still needs some work. Beta/Jitter scan failed in the 755 at the layer break (Bug in Plextools?). So i scanned in the 712. While the scans don't show POFs, this disk seems to have problems when reading back.

Burst, Sum1, Beta/Jitter, Read (712) scans:

The media code above should of course read MKM 003 00, as it reads correctly in the screenshots of the scans.

Taiyo Yuden +R 16x (Yuden000 T03 00) as sold by Plextor
PX-755a, FW 1.02
AS: OFF
Burn speed 16x CAV, no slowdown

This one burned with AS OFF to compare to an AS burn (see first burn in thread).

Very good burn IMHO. Single cause for grief: Jitter is a bit high at the beginning (TA Test says not good) but gets better later on (TA says good)

Burst, Sum1, Beta/Jitter scans:

That has to be one of the best T03 scans I've ever seen.

I always have doubts about c't reviews. I remeber the one where they stated that +R discs have worse quality than -R. In the next c't you could read that they had calibrated their machine wrong...

BTW: The above burn of a MKM 003 00 in posting #39 produces a smooth 3-8x read graph in the 755. The 755 seems to be a very capable reader...

hwp, is your batch of Plextor T03 media by any chance TH000021?

The reason I ask can be found here: Taiyo Yuden 16x DVD+R (YUDEN000 T03) Batch variation

No, it's TH000015.

They based their statement upon the fact that DVD-R wobble frequency is lower than comparable DVD+R wobble frequency, claiming that DVD-R thus has a 'theoretical' advantage (at 16x speed, at least) over +R since higher wobble frequencies could introduce higher disc jitter ...

Anyway, the 'ct bases their quality assessments entirely on AudioDev measurements with an extreme focus on in-spec disc jitter and absolutely no focus on PIF numbers (which I do not quite understand ... they once gave a '++' to written discs with a PIF max. of 13 and a PIF total of about 15000).

Besides, they always test single media specimen leaving their reviews very vulnerable to quality fluctuation ... one or two pieces of junk media can theoretically turn a good drive into a bummer and thus ruin the result.

As for the 755A review ... I highly doubt the catastrophic MCC003 Lightscribe result ... MCC media is and has always been among the most compatible media you can get if you own a Plextor drive. If I were working for 'ct, I would have repeated that test with a different piece of MCC003 media.

To me it doesn't make sense to focus on jitter instead of PIF numbers.

Jitter is underestimated IMO ... especially when it comes to compatibility with standalone DVD players.

true, but I don't think quality or compatibility can be determined one dimensionally.

Verbatim +RDL 8x (MKM 003 00)
PX-755a, FW 1.02
AS: Auto (did not create strategy, AS does not support DL)
Burn speed 6x CLV, slowed to 4x for the last few MBs

Again as with the 8x burn above this writing strategy still needs some work. Beta/Jitter scan in the 755 failed at the layer break (Bug in Plextools?). So i scanned in the 716. PIE/PIF/POE results are OK, Beta is better than the 8x burn but still outside the norm (+.15 and -.05). TA is not good on the first layer, very good on the second. All in all a burn that works, but the 716 currently does better @6x with these 8x media, look here: http://club.cdfreaks.com/showpost.ph...postcount=1855.

Burst, Sum1, Beta/Jitter, Read (716) scans: