This listing has ended.

Posts to:
Posts to:

Details about  Isolated 24bit 192kHz USB to I2S/SPDIF CM6631A PCB for ES9018 AK4399 PCM1794

See original listing
Isolated 24bit 192kHz USB to I2S/SPDIF CM6631A PCB for ES9018 AK4399 PCM1794
Item Ended
17 Apr, 2013 18:21:17 BST
US $69.95
Approximately £46.46(including postage)
US $4.00 (approx. £2.66) Economy Shipping | See details
See details about international postage here.  help icon for delivery - opens a layer
Item location:
HK, Hong Kong


eBay item number:
Seller assumes all responsibility for this listing.
Last updated on  15 Apr, 2013 04:33:38 BST  View all revisions

Item specifics

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is ... Read moreabout the condition

Galvanic Isolated 24bit 192kHz USB2.0 to I2S / SPDIF PCB CM6631A with ultralow noise 6.5uV regulator

Everybody know PC is a noisy environment, with this galvanic isolated USB to I2S PCB, no ground noise from PC inject to DAC anymore. It's for the most demand audiophile and highest charity audio. It is the best asynchronous USB2.0 to I2S PCB for audiophile Diyer to enjoy.


1) Dual 6.5uVrms Ultralow noise linear power regulator (use of decade old LM317/1117 regulator is kidding for audiophile)

2) Two dedicated oscillator 49.152Mhz/45.158Mhz for 44.1kHz and 48/96/192kHz with dedicated ultralow noise regulator for lowest jitter operation and highest clarity audio (much better than most XMOS design use 24.576Mhz and 11.2896Mhz oscillator only)

3) Solid ground plane (a must for high speed digital circuit)

4) No Via in active circuit (via inductance always create jitter problem)

5) 15ppm Japanese crystal and Murata capacitor sourced from digikey (guarantee no fake product from China)

6) Gold plate USB connector (Molex, FCI, or other depends on stock)

7) Compact size 60mm x 60mm

8) SPDIF (coaxial /optical) connection is routed out for diyer to mod if needed (audiophile don't use SPDIF, I2S is always better)

9) 100% tested before shipped (each sampling rate 44.1/48/96/192kHz i2s output are checked individually)

Windows 7/Vista/XP Driver is available to download from our website

*USB2.0 is a must for 24bit/192kHz operation
*Use a fresh install of windows and a dedicated USB port always avoid problem and run stable
*The length of I2S connection to the DAC chip should be as short as possible for best result and below 10cm is recommended

Special note for ES9018:
*Connect X49 on the PCB to replace ES9018 oscillator input for 48/96/192khz operation, connect X45 to replace ES9018 oscillator input for 44.1/88.2/176.4khz operation. X49/X45 should pair with ground to ES9018 and replace the original ES9018 oscillator output and ground. The connection should be as short as possible.

The ES9018 requires clock frequency above 40 MHz for optimal operation. This interface offers 49.152Mhz/45.158Mhz clocks that can be connected directly to the ES9018 DAC (bypassing the local clock). With synchronous operation you will not only experience better sound, but you can eliminate the unlock problem in(default power on setting, default dpll setting, no need metal shielding cover the dac chip, no need to wait for the lock to become stable after power on) that many have experienced with asynchronous operation. Other interfaces are designed to operate with oscillators of 24.576Mhz and 11.2896Mhz and thus cannot properly interface with the ES9018 in a synchronous manner. It is the only low cost interface that is optimized to interface to the ES9018 in a synchronous manner.

Please check the following I2S signal specification to decode each sampling rate:
*We have tested AK4399 ES9018 PCM1794A and they can work at 192khz with this PCB perfectly.

16/24bit 44.1kHz 5.6488Mhz 11.2896Mhz
16/24bit 48kHz 6.144Mhz 12.288Mhz
16bit 88.2kHz 5.6488Mhz 22.5792Mhz
16/24bit 96kHz 6.144Mhz 24.576Mhz
16bit 176.4kHz 11.2976Mhz 22.5792Mhz
16/24bit 192kHz 12.288Mhz 24.576Mhz

Worldwide Shipping By Registered Airmail

(Mail Tracking is available from Hong Kong Post WebSite)

Questions and answers about this item

No questions or answers have been posted about this item.

Submit bid

Time left:
Current bid:
(Approximately ##1##)
Import charges:
Your maximum bid:
Your maximum bid:
Please read the full listing. By clicking Confirm bid you commit to buy this item from the seller if you are the winning bidder. You will enter a binding contract.
By clicking Confirm bid, you are committing to buy this item from the seller if you are the winning bidder and have read and agree to the Global Shipping Programme terms and conditions - opens in a new window or tab. Import charges previously quoted are subject to change if you increase you maximum bid amount.
Resume bidding, if the page does not update immediately.
Submit bid
Review and confirm your bid
Bid confirmation
Free P&P
See item description
(Approximately ##1##)
(Enter ##1## or more)
(Enter more than ##1##)
Your maximum bid:
Increase maximum bid
Submit bid
Confirm bid
Increase maximum bid
Change bid
, you've been outbid. Don't let it get away - bid again.
, you're the highest bidder on this item. Hope you win it.
, you're the first bidder. Hope you win.
, you're currently the high bidder, but you're close to getting outbid.
, this auction is almost over and you're currently the high bidder.
, you're the high bidder, but the reserve price hasn't been met.
Please enter your bid again.
Please enter a valid number as the bid price.
Enter an amount that is equal or greater than the minimum bid required. This can be found under the bid entry box.
Maximum bids can't be lowered once they're submitted.
This seller requires the buyer to have a PayPal account to purchase this item. Get a PayPal account here .
Your bid is greater than or equal to the Buy it now price. We recommend you purchase this item via Buy it now. If you still wish to bid, you may do so below.
Time left:
Current bid:
(approximately ##1##)
Your maximum bid:
(approximately ##1##)
Increase your maximum bid:
By clicking 1 Click Bid, you are agreeing to buy this item from the seller if you're the winning bidder. Learn moreabout 1-click bid - opens in a new window or tab
(approximately ##1##)
Winning bid:
Starting bid:
Congratulations The auction has ended and you're the winner.
The auction has ended, but the reserve price was not met.
Sorry, the auction has ended and you were outbid.
Good news, you're the highest bidder.
Sorry, you've been outbid.
You're the highest bidder, but the reserve price has not been met.
Please enter a higher amount than the current bid.
Maximum bids cannot be lowered once submitted.
Please enter a valid number.