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New Portable Amp/Dac: iBasso D1 **with updates on the first page**
Nov 26, 2007 at 11:53 PM Post #2,071 of 2,626
I would be interested in hearing comments on the iBasso choice for new opamps and buffers:

Quote:

This is the new version of D1. We changed the L/R opamp to LT1364, and BUF is LMH6643. Also, the We use the LTC6241 to be the LPF of DAC. This combination has greater output power and less THD. In sum, the sound is better than before.


Is this a good combination? I will get a D1 in HK this weekend if they can get one down there for me. (It turns out that it's just the corporate secretary at their HK address. iBasso is in Shenzhen.)
 
Nov 27, 2007 at 1:31 AM Post #2,072 of 2,626
Quote:

Originally Posted by cooperpwc /img/forum/go_quote.gif
I would be interested in hearing comments on the iBasso choice for new opamps and buffers:

Quote:

This is the new version of D1. We changed the L/R opamp to LT1364, and BUF is LMH6643. Also, the We use the LTC6241 to be the LPF of DAC. This combination has greater output power and less THD. In sum, the sound is better than before.


Is this a good combination? I will get a D1 in HK this weekend if they can get one down there for me. (It turns out that it's just the corporate secretary at their HK address. iBasso is in Shenzhen.)


I have the LTC6241 that I was going to try in the LR, but I guess I can try it in the DAC (instead of my 6234). I also have a pair of LMH6643 I can try in the buffers (instead of my AD8397). But, my pair of AD797 in the LR aren't going anywhere.
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Nov 27, 2007 at 1:45 AM Post #2,073 of 2,626
Quote:

Originally Posted by HeadphoneAddict /img/forum/go_quote.gif
I have the LTC6241 that I was going to try in the LR, but I guess I can try it in the DAC (instead of my 6234). I also have a pair of LMH6643 I can try in the buffers (instead of my AD8397). But, my pair of AD797 in the LR aren't going anywhere.
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Hey how are you fitting the AD797 into the D1 case? I can't fit the adapter into place without a riser, and with a riser it would be way too high. Can you take a picture of how you have it set up so you can fit the 2 single > dual adapter into the case?
 
Nov 27, 2007 at 3:25 AM Post #2,074 of 2,626
The only way I could fit the 2 - 1 adapter in the case was to take the dip sockets out and solder the chips to the board. I also had to trim away some of the board (I used sidecutters, careful not to cut any traces). there are different types of adapters though... I bought mine off ebay assembled with two ad 797 chips.
 
Nov 27, 2007 at 3:46 AM Post #2,076 of 2,626
No!

It's a direct plug-in with NO MODS, using the Browndog 2:1 adapter that I got from HiFlight. I do have another adapter that needs to be trimmed, so I didn't use it.

See the AD797x2 on the adapter in the photo below, on the table right next to the D1, before I installed it. It fit like a glove with no bending or mods or cutting or anything - I just neglected to take a picture after it was in.

The photo was from a review I did around 11/4, when the OPA2111 was still in, then I put the AD797x2 in and did another review 11/5. http://www.head-fi.org/forums/3398212-post31.html

d1_lyrix_opamps.jpg
 
Nov 27, 2007 at 6:02 AM Post #2,080 of 2,626
Quote:

Originally Posted by souperman /img/forum/go_quote.gif
I guess my adapter is too big then. Do you know where I can purchase the small ones you are using. Mine are nearly twice the size of yours.


I got it from HiFlight. PM him, he's been a great help.
 
Nov 27, 2007 at 6:06 AM Post #2,081 of 2,626
Nov 27, 2007 at 6:08 AM Post #2,082 of 2,626
One of these days I may turn into a "why don't you do a search" turd, but for now it is still fun to be the one to do the search and be the first to post the answer
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Nov 27, 2007 at 6:10 AM Post #2,083 of 2,626
Quote:

Originally Posted by Monster_Omelette /img/forum/go_quote.gif
Has anyone tried the OPA627 in the L/R?


Yes,

I currently use OPA627BP in L/R on browndog single to dual op amp adapter DIP, AD8397 in BUFFER and LTC6241HV in the DAC. This setup to me sounds best to my ears.

After a long session of op amp rolling for the DAC section between (LT6234, LTC6241HV & LMH6643MA) listening to Diana Krall – The girl in the other room, Track 3-Temptation.

LTC6241HV is the winner; it had the most detail of the three. Follow by LMH6643MA the sound is similar to LTC6241HV but the snare drum didn’t sound as good as the LTC6241HV. Last position is LT6234 it had the least amount detail, sounded flat in this setup.
 
Nov 27, 2007 at 6:25 AM Post #2,084 of 2,626
Time to put my left over LTC6241HV to use then - that's one of my favorite songs...

HiFlight had me go with the LTC6234 for DAC (after I tried the AD8656 in the DAC).

I have the same buffers as you (AD8397), but I went with the AD797 for L/R which was HiFlight's second choice "by a hair" - "Punchy Big Sound and a little more forward" if I recall. I was very happy with the OPA2111 in LR till I heard the AD797. It was like, OMG!
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Nov 27, 2007 at 6:40 AM Post #2,085 of 2,626
Quote:

Originally Posted by cafe zeenuts /img/forum/go_quote.gif
Yes,

I currently use OPA627BP in L/R on browndog single to dual op amp adapter DIP, AD8397 in BUFFER and LTC6241HV in the DAC. This setup to me sounds best to my ears.

After a long session of op amp rolling for the DAC section between (LT6234, LTC6241HV & LMH6643MA) listening to Diana Krall – The girl in the other room, Track 3-Temptation.

LTC6241HV is the winner; it had the most detail of the three. Follow by LMH6643MA the sound is similar to LTC6241HV but the snare drum didn’t sound as good as the LTC6241HV. Last position is LT6234 it had the least amount detail, sounded flat in this setup.


What browndog adapter are you guys all talking about? I can't find it on their website. I'm assuming it's half the size of the adapter I'm using right now.
 
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