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Old 15-06-2012, 11:01 PM   #1
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JDS Labs : cMoyBB v2.03 Headphone Amplifier

The wait is finally over! For those who know my story. I went down to the post office today to collect my item (no more waiting).

I'd like to start off this thread by thanking Jon Seabar (Electrical Engineer | President) from JDS Labs.

He has been extremely kind to me and went out of his way to get things done. His service is excellent to me and I am definitely going to tell the 'world' of his service along with his prized products.

With that, I'd like to thank Jon Seabar. Thank You!

Here's what I've ordered.
cMoyBB v2.03 Headphone Amplifier (OPA2227)
2x9V Power Supply
AD8620ARZ with BrownDog Adapter (Needs minimum of 10V, hence my 18V setup)

Price : $119.04 USD (w/ Express Shipping)

Pictures: Full album here!







Will do impressions in a few weeks time. Got both opamps to test.
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Last edited by paul02; 15-06-2012 at 11:54 PM..
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Old 15-06-2012, 11:02 PM   #2
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OPA2227PA

Look at the gold-plated socket ^^

AD8620ARZ (w/ Browndog Adaptor)
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Last edited by paul02; 16-06-2012 at 01:50 PM.. Reason: OPA2227PA & AD8620ARZ (w/ Browndog Adaptor) Pictures!
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Old 15-06-2012, 11:02 PM   #3
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Thumbs up Impressions between the two OPAMPS!

Got to listen to a pre production model c421 with ad8620.


The ad8620 offers more clarity and details and a neutral sound stage, bass is neutral as well. more like the O2 amp sans sound stage, less darker.

The opa2227 is more coloured, stronger bass, more warmth in mids and a hint brightness but has a more laid back sound.

They sound quite different from one and other and it is down to equipment pairing.

Impressions on both OPAMPS are similar to the quote above by @dqwong.

On the cMoy v2.03,

OPA2227PA
- wide sound scape
- boomy bass (/attributed to its wider sound scape, definitely for bass-heads)
- neutral mids
- neutral highs
-more 'air' between instruments (contributing factor to a wider sound scape)

AD8620ARZ
- medium-sized sound scape (as compared to OPA2227PA)
- more depth in the instruments
- clear and thump'y bass
- neutral mids (slightly more forward compared to OPA2227PA)
- neutral highs

OPA2227PA to the user gives songs a 'live' sound to them.

AD8620ARZ gives a more detailed and forward sound to the user

Hence,
I prefer AD8620ARZ. Attaining wider sound scape is something headphones cannot do as well as speakers. More depth lets you hear the fullness of the sound and catching the missing details.
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Last edited by paul02; 28-06-2012 at 11:36 PM.. Reason: more insight to the sound
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Old 15-06-2012, 11:15 PM   #4
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Looking forward to your review. I'm sure it will be a killer amp in this price bracket.

And your album is private btw.
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Old 15-06-2012, 11:19 PM   #5
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The word appalling has a generally negative connotation, fyi
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Old 15-06-2012, 11:21 PM   #6
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The word appalling has a generally negative connotation, fyi
Oops! Wrong word.
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Old 15-06-2012, 11:22 PM   #7
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Oops! Wrong word.
very wrong word indeed

Last edited by SoggyBear; 15-06-2012 at 11:26 PM..
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Old 15-06-2012, 11:23 PM   #8
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Looking forward to your review. I'm sure it will be a killer amp in this price bracket.

And your album is private btw.
Thank you. Album is open now.
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Old 15-06-2012, 11:26 PM   #9
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include price too!
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Old 15-06-2012, 11:55 PM   #10
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include price too!
Noted. Done.
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Old 16-06-2012, 12:02 AM   #11
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Wahhh gxgx!

How much did it set you back in total?
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Old 16-06-2012, 12:06 AM   #12
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Wahhh gxgx!

How much did it set you back in total?
Set me back?
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Old 16-06-2012, 12:18 AM   #13
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Set me back?
Like how much did it cost you la..
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Old 16-06-2012, 12:21 AM   #14
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Like how much did it cost you la..
About 151.38 SGD
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Old 16-06-2012, 02:33 AM   #15
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i bought the 9v non rechargeable one.

very good so far! love the bass boost hehe
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