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Is this a real cmoybb?

post #1 of 17
Thread Starter 

I was looking for a cmoybb on craigslist and found one for a very nice price of $40. However, I question if it is actually legitimate because there do seem to be a few differences between the sellers pictures and the pictures on the JDS labs website. This is most likely a DIY and would probably work just like the official cmoybb but I would like confirmation just in case.

 

 

FYI, the seller does mention that there is a small switch inside that boosts bass response as well as an additional circuit that allows the battery to be charged with a wall adapter, or for the whole unit to be powered with it, with no battery in place.


Edited by thesuperguy - 3/28/13 at 6:33pm
post #2 of 17

looks legit to me.  The charge + battery monitoring circuit is a nice addition.  Looks like a nice amp.

 

post #3 of 17

Yes its a cmoybb, i have a new pcb sitting right here and they do match. its the type that was not made for recharging a battery so the added board is for charging. 

post #4 of 17
Thread Starter 

Great! There doesn't seem to be that little indicator light though. Oh and since they pretty much match, was this board bought from JDS?

post #5 of 17
Quote:
Originally Posted by thesuperguy View Post

Great! There doesn't seem to be that little indicator light though. Oh and since they pretty much match, was this board bought from JDS?

you mean the LED?  It looks like they used a smaller 3mm green LED in a black LED holder.  The pic I posted looks like a 5mm LED and no holder.  At any rate its a legit moyBB.

 


Edited by kramer5150 - 3/28/13 at 9:44pm
post #6 of 17
Thread Starter 

Now all that's left is waiting for the seller to respond to my email :P

post #7 of 17
Quote:
Originally Posted by thesuperguy View Post

I was looking for a cmoybb on craigslist and found one for a very nice price of $40. However, I question if it is actually legitimate because there do seem to be a few differences between the sellers pictures and the pictures on the JDS labs website. This is most likely a DIY and would probably work just like the official cmoybb but I would like confirmation just in case.

 

 

FYI, the seller does mention that there is a small switch inside that boosts bass response as well as an additional circuit that allows the battery to be charged with a wall adapter, or for the whole unit to be powered with it, with no battery in place.

 

That's a very old cMoyBB w/discontinued charging adapter.

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post #8 of 17
Thread Starter 

Would it work as well as the newest ones?

post #9 of 17
Quote:
Originally Posted by thesuperguy View Post

Would it work as well as the newest ones?

 

Yes, performance should be the same. Here's the cMoyBB version log:

http://www.jdslabs.com/versions.php?type=cmoy&page=cmoy

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post #10 of 17

I wish I knew more about my Cmoy amp (who made it etc)

 

 

 

It looks like a Penguin Royal but doesnt have the signature board

http://www.penguinamp.com/The-Royal-Amp:::2001.html


Edited by ExpatinJapan - 3/29/13 at 6:03pm
post #11 of 17

Pretty sure thats a penguinamp, just an earlier/older rendition of the design.

 

Chu Moy is credited with the original design.  heres the tangentsoft site.

 

http://tangentsoft.net/audio/cmoy-tutorial/

post #12 of 17
Quote:
Originally Posted by ExpatinJapan View Post

I wish I knew more about my Cmoy amp (who made it etc)

 

 

 

It looks like a Penguin Royal but doesnt have the signature board

http://www.penguinamp.com/The-Royal-Amp:::2001.html

 

That is the model before Royal. It is based on LM6172 instead of AD8397. It was referred as the original 'Penguin Amp' on eBay at the time, made by Robert @ Headstage.

post #13 of 17

Awesome. It still sounds crystal clear.

post #14 of 17

Yes, looks nice!

post #15 of 17

Have a quick "normal or not normal" question on my JDS cmoybb.

 

When I turn it off (still connected to Schitt Modi DAC), there is slight buzzing sound in my headphones. The sound persists - it's not transient.

 

No sound at all when the switch is on but at low volume.

 

Running off mains power (non-rechargeable version).

 

Any help appreciated - thanks.

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