[doobooloo]

So I own an Audiotrak/ESI OptoPlay 2.0...

http://www.audiotrack.net/esi/php/optoplay.php

Well, I typed this whole long post and then somehow I pressed back on my keyboard so I lost everything. To make things short...

I took the MS6308 (Mosa Electronics) opamp/headphone driver out and just connected the in to out on the unit, and when connected to the PPA, the sound is just phenomenal.

I would say this is even better than the Echo MIA MIDI I had before. Although I can't do A/B this is clearly the best I've ever heard.

So basically I reduced the number of opamps in the path from 2 to 1, right? Well it sounds exactly like that, seems like a layer of filth has been removed from my music. Really, everything is just so much smoother yet so much more detailed, just very natural and fluid and just... REAL! Haha. I can't close my jaws right now..

Anyhow. I assume the same thing will work with the Transit as well?

Anyhow. Back to listening... I will post more impressions soon...

 

[Glassman]

any pictures of the inside? which DAC does it use? some AKM or Wolfson?

 

[Haribo]

Quote:

Originally Posted by Glassman any pictures of the inside? which DAC does it use? some AKM or Wolfson?

Does your browser not support pictures?

Edit: http://www.asahi-kasei.co.jp/akm/en/...53/ak4353.html

 

[Glassman]

I wasn't expecting such info on Audiotrak's site and knowing OptoPlay I didn't even checked that site.. thanks for noting it..

 

[doobooloo]

Yup, it's the AK4353.

I will post some pics later, but not now... gotta enjoy the music first...

 

[dip16amp]

Was there any DC offset on the output of it?

 

[Iron_Dreamer]

Sounds like the same type of results the RME bypass mod gives. I will have to do this for Jasper994 who has an Optoplay.

 

[doobooloo]

Quote:

Originally Posted by dip16amp Was there any DC offset on the output of it?

Nope. Zero volts of DC.

 

[McKajVah]

Does anyone know how the AKM sound compared to PCM2702?

Hmmm...the optoplay seems to be cheap $59.

 

[Jasper994]

The question is, does it still drive headphones directly? or does the mod result in the necessity of a separate amp?

 

[doobooloo]

Quote:

Originally Posted by Jasper994 The question is, does it still drive headphones directly? or does the mod result in the necessity of a separate amp?

No, the OptoPlay can't drive headphones directly anymore. Even at full volume with E888 earbuds, the sound is faint at best.

But it does a terrific job at providing an amp with good signal!

If you want it to drive headphones, a good mod would be replacing the crap MS6308 with a better dual opamp that will be driven at 5V such as the OPA2132?

 

[Jasper994]

Quote:

Originally Posted by doobooloo No, the OptoPlay can't drive headphones directly anymore. Even at full volume with E888 earbuds, the sound is faint at best. But it does a terrific job at providing an amp with good signal! If you want it to drive headphones, a good mod would be replacing the crap MS6308 with a better dual opamp that will be driven at 5V such as the OPA2132?

That might be a very good idea... thank you!

 

[doobooloo]

Quote:

Originally Posted by Jasper994 That might be a very good idea... thank you!

Keep us updated with the results!

 

[Jasper994]

Peter,

Any opinions? Have you heard/read anything about the op amp he's talking about?

 

[doobooloo]

Actually...

The OPA2132 probably won't work since it requires +/- 2.5V...

Hmm. What could work in this position?