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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: Not many have complained about the 5400 posted by Metralla on October 26, 2017 at 18:22:27:
Yes, the later generation red lasers used on DVD players (as opposed to the IR lasers used for CD) seemed to be much more reliable than the earlier generation ones. At least this seems to be true for Japanese-designed products such as Sony and Pioneer. The Chinese-designed Oppo players have also had fairly reliable lasers, but perhaps they are buying from Japanese-designed sources - I know that the laser in the BDP-83 was identical to that in the original version of the Sony PlayStation 3, which almost certainly was designed by Sony and made to Sony's specifications.
In contrast it seems that the really old IR lasers for CD players from the '80s and early '90s were super reliable, while some of the ones from the late '90s and later were horrible - especially the ones fom Philips. The TEAC transports had much more reliable lasers than the Korean made DVS transports, for example. I'm pretty sure it boils down to QC during the manufacturing process, where contaminants and/or sealing of the laser diode to prevent the entry of contaminants is the key. But I could easily be wrong. Perhaps it is the servo circuitry that is supposed to regulate the amount of current fed to the laser, as over-current will shorten the lifespan of the laser as well.
I've not enough experience with the blue lasers used for Blu-ray to know how reliable they are nor if newer ones are better or worse than older ones.
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Follow Ups
- RE: Not many have complained about the 5400 - Charles Hansen 10/26/1719:20:12 10/26/17 (0)
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