What about quality and live time expectancy of this unit especially concerning the laser unit (optical pick up) ?
http://jmf-audio.com/dmt37_en.htm
https://6moons.com/audioreview_articles/jaysaudio/4/
Long live laser units for CD use only there was not many.
This included only certain models from Hitachi like HOP-M3 (DENON Linn Karik), Sanyo like SF-91 (Cambridge Audio CD-4/CD-6(CDT), Optima Series from JVC, used also in Japan's best available transport JVC EXU-901a - go to
https://www.diyaudio.com/community/...ct-1-ct1-better-than-vam1254-cdpro2lf.149032/
and Philips CDM-0, CDM-1, CDM-3 and professional versions of CDM-4.
By far the shortest lived laser units were those from SONY KSS-series, even such from top class cd player devices like SONY ES series and Accuphase (e. g. KSS-272A, KSS-274 KSS-190A).
This is the reason, why retail prices for NOS versions (new old stock) are up to € or US-$ 2,500 (!!!).
A friend of me want to buy a SACD capable CD player and have heard from others, that models from brands like e. g. Shanlin Ayon, McIntosh, Project despite very high purchase prices are very unreliable.
The reason therefore is the fact, that the equipped mechanism parts, especially the optical pick up it is the cheapest available for the mass market - check out this URL's:
Price replacement parts:
https://www.ebay.de/itm/265606415758?hash=item3dd760458e:g:JpcAAOSwPLFiOHOk
https://www.ebay.de/itm/265604093786?hash=item3dd73cd75a:g:cYMAAOSwUnJiNpOQ
https://de.aliexpress.com/item/32415646038.html
used in CD-PRO 8 from StreamUnlimited
https://www.project-audio.com/wp-content/uploads/2019/04/CDBoxRS2T-EN.pdf
https://www.audiosciencereview.com/forum/index.php?threads/lets-talk-cd-players.9104/page-6
The fact that the mechanism's backing plate was replaced from a solid block of metal milled from the solid, doesn't extend the lifetime of those parts that are in use in a DVD player that costs less than lunch.
Post #4, #6 and #8 under
https://www.diyaudio.com/community/threads/streamunlimited-dedicated-to-high-end-cd.337527/
don't gives little hope, that the situation here will improve again especially in order to SACD playback.
But maybe the transport mentioned in the headline is like one know it from earlier times of the CD era - possibility there are some experiences in the meantime. Thanks for comments.
P.S.: I would still trust JVC the most here, since older DVD players from this brand also have no problems with short-lived laser units (and vintage cd player models from this brand with OPTIMA units also still works).
http://jmf-audio.com/dmt37_en.htm
https://6moons.com/audioreview_articles/jaysaudio/4/
Long live laser units for CD use only there was not many.
This included only certain models from Hitachi like HOP-M3 (DENON Linn Karik), Sanyo like SF-91 (Cambridge Audio CD-4/CD-6(CDT), Optima Series from JVC, used also in Japan's best available transport JVC EXU-901a - go to
https://www.diyaudio.com/community/...ct-1-ct1-better-than-vam1254-cdpro2lf.149032/
and Philips CDM-0, CDM-1, CDM-3 and professional versions of CDM-4.
By far the shortest lived laser units were those from SONY KSS-series, even such from top class cd player devices like SONY ES series and Accuphase (e. g. KSS-272A, KSS-274 KSS-190A).
This is the reason, why retail prices for NOS versions (new old stock) are up to € or US-$ 2,500 (!!!).
A friend of me want to buy a SACD capable CD player and have heard from others, that models from brands like e. g. Shanlin Ayon, McIntosh, Project despite very high purchase prices are very unreliable.
The reason therefore is the fact, that the equipped mechanism parts, especially the optical pick up it is the cheapest available for the mass market - check out this URL's:
Price replacement parts:
https://www.ebay.de/itm/265606415758?hash=item3dd760458e:g:JpcAAOSwPLFiOHOk
https://www.ebay.de/itm/265604093786?hash=item3dd73cd75a:g:cYMAAOSwUnJiNpOQ
https://de.aliexpress.com/item/32415646038.html
used in CD-PRO 8 from StreamUnlimited
https://www.project-audio.com/wp-content/uploads/2019/04/CDBoxRS2T-EN.pdf
https://www.audiosciencereview.com/forum/index.php?threads/lets-talk-cd-players.9104/page-6
Post #4, #6 and #8 under
https://www.diyaudio.com/community/threads/streamunlimited-dedicated-to-high-end-cd.337527/
don't gives little hope, that the situation here will improve again especially in order to SACD playback.
But maybe the transport mentioned in the headline is like one know it from earlier times of the CD era - possibility there are some experiences in the meantime. Thanks for comments.
P.S.: I would still trust JVC the most here, since older DVD players from this brand also have no problems with short-lived laser units (and vintage cd player models from this brand with OPTIMA units also still works).
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I know music reproduction via compact disc/SACD instead HDD/SSD is as outdated as sending a letter by post-mail instead of using "Whats App" or email or riding a horse to work instead of taking the car or the train (check out the posts from the last mentioned link).
Nevertheless the question because there are still a lot of users who prefer playback via CD/SACD (and still many manufacturers who produce devices therefore).
It looks like they need some work done on the SACD/DSD side. High-rate DSD was the first format to exceed Master Tape quality if you believe people who do their backups of Master Tapes and people who do recording, mixing and mastering for DSD.
Edit: OR... Blue Ray Pure Audio does indeed provide better sound than DSD, and I don't know it yet...
Edit: OR... Blue Ray Pure Audio does indeed provide better sound than DSD, and I don't know it yet...
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Very early on, these laser units were no longer available as regular spare parts.
Authorized SONY repair centers did not confirm my assumption at the time that the amount of spare parts from SONY was deliberately kept small - instead they confirmed the above-average failure rate and the resulting early out-of-stocks of this parts (go also to various threads here - keyword KSS-Series and SLD-104 SONY laser diode).
Even German's special guy for SONY modifications, Dipl.-Ing. Michael Swoboda must deal with this problem.
Devices,
SONY-Acccuphase/DENON Devices that are equipped with this laser unit and still work perfectly today with normal use over 30 years are the absolute exception - so I think.
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"SONY-Accuphase/DENON Devices that are equipped with this laser unit and still work perfectly today with normal use over 30 years are the absolute exception - so I think."
My personal experience and that of friends with Sony and Accuphase CD players has been exactly the opposite for products using the KSS-272 and KSS-271 optical assemblies. I can't speak about Denon players; never owned or repaired any of those. Also, I didn't know Denon products ever used the Sony KSS high-spec optical assemblies. Can you provide model numbers? I'm very curious ...
Now, for products using the other (i.e. cheaper, less robust) KSS optical assemblies, I might be inclined to agree with you.
I can add that over the years, I have seen A LOT more CD player problems due to worn-out spindle motors, damaged ribbon cables connecting the optical block to the signal processor PCB, contaminated (i.e. dirty from cigarette smoke or dust) lenses, deformed belts and electronic damage resulting from inexperienced tweakers BY FAR versus problems caused by optical assembly failures where the laser wore out.
My personal experience and that of friends with Sony and Accuphase CD players has been exactly the opposite for products using the KSS-272 and KSS-271 optical assemblies. I can't speak about Denon players; never owned or repaired any of those. Also, I didn't know Denon products ever used the Sony KSS high-spec optical assemblies. Can you provide model numbers? I'm very curious ...
Now, for products using the other (i.e. cheaper, less robust) KSS optical assemblies, I might be inclined to agree with you.
I can add that over the years, I have seen A LOT more CD player problems due to worn-out spindle motors, damaged ribbon cables connecting the optical block to the signal processor PCB, contaminated (i.e. dirty from cigarette smoke or dust) lenses, deformed belts and electronic damage resulting from inexperienced tweakers BY FAR versus problems caused by optical assembly failures where the laser wore out.