[cafe zeenuts]

Has anyone try AD797 in the DAC section? I want to know if its safe to do so i dont wanna blow up my D1.

 

[HiFlight]

The AD797 is a single channel opamp, you need to use a dual channel in the DAC section. Don't try it!

There is room to use an adapter for the LR to enable the use of single channel opamps in that socket.

 

[MoAv]

I don't get it, why my D1 won't work with my opa2111kp on the L/R ?

 

[musicmaker]

I just installed my AD797s in the LR (thanks to HiFlight for the adapter set and buffer bypass sockets). All I can say is WOW ! The sound is great. So much so that I'm contemplating selling my beloved XP-7.

I tried the OPA2111, LT1364 in addition to the stock in the LR and the AD797 sounds the best in my setup (ihp-140 -> sysconcept optical out -> D1 -> Senn HD25-1 II).

I'm going to experiment with some opamps in the dac section but I am very VERY happy with the AD797s in the LR.

 

[musicmaker]

I don't have buffers with AD797s. Havent tried the LT1364 unbuffered. I Ran them w/ LM4562 buffers.

Between the AD797s and LT1364s w/ LM4562s, the AD797 have a lot more impact, is a bit more upfront and has better bass definition. The treble is also smoother while still being detailed.

The LT1364 is actually a good chip and I preferred it to the OPA2111. The treble was still a bit harsh. Now, keep in mind that some folks thought that the LM4562s had a slightly problematic treble. I'll need to try the LT1364s unbuffered to draw an apple-to-apple comparison.

 

[musicmaker]

Just tried the LT1364 unbuffered. From brief listening, I definitely prefer the AD797s. Better bass definition and a balanced treble. The LT1364 sounds a bit congested in comparison with a slightly emphasized treble.

AD797s w/ LT1364 buffers. Let me try that

 

[musicmaker]

I tried the AD797s in the LR with the LT1364 buffers. I definitely prefer the AD797 unbuffered. I switched the LT1364s and buffer bypass sockets a few times to be sure. I am sure - the AD797s without buffers sound best and cleaner to me. I have found my LR opamp.

 

[PPkiller]

Quote:

Originally Posted by musicmaker /img/forum/go_quote.gif I tried the AD797s in the LR with the LT1364 buffers. I definitely prefer the AD797 unbuffered. I switched the LT1364s and buffer bypass sockets a few times to be sure. I am sure - the AD797s without buffers sound best and cleaner to me. I have found my LR opamp.

what opamp are you useing for the dac?

anyone tried lt1364 vs lt6241 vs ad8656 for the dac section? i'm interested in finding out which of the 3 opamp will sound best for the dac..

 

[musicmaker]

Quote:

Originally Posted by PPkiller /img/forum/go_quote.gif what opamp are you useing for the dac? anyone tried lt1364 vs lt6241 vs ad8656 for the dac section? i'm interested in finding out which of the 3 opamp will sound best for the dac..

Haven't played around with that many opamps in the dac position. My browndog adapters arrived yesterday and I have a bunch of opamps waiting to be soldered to try in the dac. At this stage, I've only compared the stock AD8616 vs the LT1364. The AD8616 sounds much better compared to the LT1364 in the dac position.

Shortly, I'll be trying the Ad8656 and LT6241 in the dac. Will post impressions.

 

[PPkiller]

thanks... someone mention LMH6643 sounds good in dac as well (better then 8656 in his opinion). maybe you can give it a try..

 

[cafe zeenuts]

Quote:

Originally Posted by HiFlight /img/forum/go_quote.gif The AD797 is a single channel opamp, you need to use a dual channel in the DAC section. Don't try it! There is room to use an adapter for the LR to enable the use of single channel opamps in that socket.

OK thanks HiFlight, btw can you post how to make a buffer bypass socket?

Cheers

 

[cafe zeenuts]

Quote:

Originally Posted by PPkiller /img/forum/go_quote.gif thanks... someone mention LMH6643 sounds good in dac as well (better then 8656 in his opinion). maybe you can give it a try..

That could have been me, it was actually between LMH6643 vs LT6241. I found that LT6241 is better then LMH6643 in the DAC.

 

[cafe zeenuts]

Quote:

Originally Posted by PPkiller /img/forum/go_quote.gif what opamp are you useing for the dac? anyone tried lt1364 vs lt6241 vs ad8656 for the dac section? i'm interested in finding out which of the 3 opamp will sound best for the dac..

I have try all three opamp in the DAC, after a short session listening to Track 14 (habanera fantasia from) This k2 HD sound! CD.

I have conclude that LTC6241 had the most detail of the three, it had better detail mids and highs compare to AD8656 and LT1364. I guess thats why iBasso is using them in their D1 now.

I like AD8656 second then Lt1364 third. The difference between AD8656 and LT1364 is very small.

BTW i'm using OPA627BP in L/R and AD8397 in buffer.

 

[PPkiller]

Quote:

Originally Posted by cafe zeenuts /img/forum/go_quote.gif I have try all three opamp in the DAC, after a short session listening to Track 14 (habanera fantasia from) This k2 HD sound! CD. I have conclude that LTC6241 had the most detail of the three, it had better detail mids and highs compare to AD8656 and LT1364. I guess thats why iBasso is using them in their D1 now. I like AD8656 second then Lt1364 third. The difference between AD8656 and LT1364 is very small. BTW i'm using OPA627BP in L/R and AD8397 in buffer.

roger.... have you tried ad8066 for buffer with opa627bp? i prefer it over ad8397... someone mention about lmh6655 as buffer... thinking of giving it a try...

 

[cafe zeenuts]

Nope, i have not try Ad8066, i have AD797 coming my way cant wait to try them in D1.

At this stage i reckon OPA627BP L/R AD8397 buffer and LTC6241 DAC sounds very good to my ears.