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hollowman
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Confused: JA's Ayre CX-7 CD player 5/2003 review

Couple of Q's. First about Ayre CDPs in general: Ayre's ad in recent Stereophile claims they were first (2002) to use CD-ROM drive. That seems hard to believe considering the date: 2002. Surely some other manuf. has used a CD-ROM drive in their CDP. Can someone clarify?

In the 5/2003 John Atkinson Ayre CX-7 review , JA noted:

Quote:

...a CD-ROM mechanism sourced from TEAC and feeding what appear to be S/PDIF-encoded data to the printed circuit board that sits behind the output jacks. This double-sided board carries both surface-mount and traditional components, and the digital data are processed by an AKM receiver chip.


- Does this mean the Ayre CX-7 passes digital data from the transport to the decoder/receiver using SPDIF format? I may have read the review incorrectly: not using SPDIF (other than for digital out, but Naim objects to even that!) is a primary goal for producing a modern, high-end, all-in-one CDP. Looking at my Philips Service Manual for another all-in-one CDP model, the digital data between the transport and decoder is "RF".

- Which AKM receiver chip is used by that Ayre? (You'll need to peek inside!)

- How have the above changed/evolved for the latest Ayre CDPs?

Thx!

Editor
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Re: Confused: JA's Ayre CX-7 CD player 5/2003 review


Quote:
Couple of Q's. First about Ayre CDPs in general: Ayre's ad in recent Stereophile claims they were first (2002) to use CD-ROM drive. That seems hard to believe considering the date: 2002. Surely some other manuf. has used a CD-ROM drive in their CDP. Can someone clarify?

I believe Meridian used a DVD-R drive in their 1999-vintage Model 800 DVD-A player, but that doesn't gainsay Ayre's claim.


Quote:
- Does this mean the Ayre CX-7 passes digital data from the transport to the decoder/receiver using SPDIF format?

That is what I decided at that time, but I haven't looked inside a CX-7 since.


Quote:
- Which AKM receiver chip is used by that Ayre?

I am pretty sure i have a photo of the circuit boards in my lab work book, so I will check this when I am back in the office Monday.


Quote:
- How have the above changed/evolved for the latest Ayre CDPs?

For that you will need to ask Ayre.

John Atkinson
Editor, Stereophile

Editor
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Re: Confused: JA's Ayre CX-7 CD player 5/2003 review


Quote:

Quote:
- Which AKM receiver chip is used by that Ayre?

I am pretty sure i have a photo of the circuit boards in my lab work book, so I will check this when I am back in the office Monday.

It's an AKM AK4112B.

John Atkinson
Editor, Stereophile

hollowman
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Re: Confused: JA's Ayre CX-7 CD player 5/2003 review


Quote:

Quote:
hollowman wrote: Does this mean the Ayre CX-7 passes digital data from the transport to the decoder/receiver using SPDIF format?


John Atkinson wrote: That is what I decided at that time, but I haven't looked inside a CX-7 since.


From the Specs of the Ayre CX-7 review, the unit does not feature Digital Input (a good thing). So, AFAIK and IMO, a SPDIF signal should not enter the decoder. But if the unit uses AKM AK4112B receiver (and not a dedicated decoder), then SPDIF-based data transmission within CX-7 is indeed correct. Wonder why Ayre chose this topology -- and do they still do it this way in their latest CX-7 updates?
SPDIF, IME, is a big compromise.

hollowman
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Re: Confused: JA's Ayre CX-7 CD player 5/2003 review


Quote:

Quote:

Quote:
- Which AKM receiver chip is used by that Ayre?


I am pretty sure i have a photo of the circuit boards in my lab work book, so I will check this when I am back in the office Monday.


It's an AKM AK4112B.

Thx for digging up this info, JA
One more question for you if you have that photo lying around:
What is the clock freq.(i.e., the freq. of the osc./crystal)? This unit may even have two main clocks: one for CD/SACD and one for DVD-based formats.
Reason I ask: the audiophile universal players tend to sound significantly better than mainstream universal (even higher end mainstream players, like Pioneer Elite or top Denons) . I'd like to establish some scientific correlation to what I perceive. The mainstream units' oscillators tend to be 27MHz, which is freq. optimized for video, not audio. E.g., 24.576MHz oscillators may be used in the audiophile uni's for DVD-based audio; SACD, on the other hand, works at a multiple sample frequency of CD (2.822Mhz).
Thanks again!

mrlowry
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Re: Confused: JA's Ayre CX-7 CD player 5/2003 review

The CX-7 is NOT a universal player, it only plays CD's. The C-5 is the universal player.

Kal Rubinson
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Re: Confused: JA's Ayre CX-7 CD player 5/2003 review


Quote:
The CX-7 is NOT a universal player, it only plays CD's. The C-5 is the universal player.

It was until the appearance of BluRay.

Kal

hollowman
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You're right!


Quote:
The CX-7 is NOT a universal player, it only plays CD's. The C-5 is the universal player.

You're right -- my bad!
But I'm still curious about the clock so I'll create a new thread. Thx!

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