worth replacing the pcm56p-k in an old cd player? - diyAudio
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Old 7th September 2007, 02:04 PM   #1
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Default worth replacing the pcm56p-k in an old cd player?

Hi, greeting from a novice.

I got a Denon dcd-1700 from a 2nd-hand equipment store, am aware the model is 18 years old, and it used to be a top-of-the-line model from Denon.

I am quite impressed with the built quality of this machine (it is really built-like-a-tank), and it does play reliably even with cd-r discs. It seems to me it could be a keeper so I am toying with the idea of doing some modification on it.

Being a novice, i am only aware of the simplest modifications, namely, replacing the caps and op ams at the analogue output stage (done).

Now, I am enticed by the notion that the 16-bit pcm56p-k can be replaced by a pin compatible 18-bit pcm61p.

Can use some advice on the following :

1. Does replacing the pcm56p by an pcm61p "automatically' give me an 18-bit decoding player ? That the pcm61p has the in-built capability to add the extra 2-bits of data to the 16-bit CD signal for decoding, and no extra component need to be added to realize true 18-bit decoding.

2. Is there a significant audio quality improvement for such modification ? Or should other modification take priority?

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Old 7th September 2007, 06:43 PM   #2
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For the pcm61 the digital filter would have to output 18bit but it does not. Anyway the 61 is not better.
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Old 7th September 2007, 08:34 PM   #3
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Originally posted by Bernhard
For the pcm61 the digital filter would have to output 18bit but it does not. Anyway the 61 is not better.

Thanks for the input Bernhard
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Old 8th September 2007, 08:17 AM   #4
lucpes is offline lucpes  Romania
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What I would do is socket the things and also get the AD equivalents which are AD1852 and AD1861 as far as I remember - I mean why not play around a bit
We should no more let numbers define audio quality than we would let chemical analysis be the arbiter of fine wines. Measurements can provide a measure of insight, but are no substitute for human judgment. Nelson Pass
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