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iBasso D1 Opamp Rolling

post #1 of 23
1/2/08 at 3:01am
Thread Starter 
i just got my iBasso D1 last week, and it sounds alright with my HD580. however, i'm not all that impressed especially in the bass department. i feel that it's a little to loose for my taste. what opamps should i use to increase the impact of the bass? also, where can i buy opamps?
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post #2 of 23
1/2/08 at 3:09am
I hear the AD8397 has good bass impact.

Analog Devices AD8397 - Rail-to-Rail, High Output Current Amplifier

You request a sample from the site. However, you must keep in mind that this is a SOIC chip and needs to be mounted on a Brown Dog.
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post #3 of 23
1/2/08 at 3:43am
Thread Starter 
thx for the info. i'm a total noob when it comes to opamps, so i don't know what a brown dog is. i thought that the iBasso D1 had sockets for the opamps that allowed for easy switching.
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post #4 of 23
1/2/08 at 1:30pm
Do a search on ibasso in the amp section and you will find some really good information and advice there. There are a couple of threads on the D1 that you may find helpful.

Welcome to head-fi! I think you will find the D1 a great product, especially if you use the DAC.
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post #5 of 23
1/2/08 at 2:11pm
Thread Starter 
thanks for the advice. i tried researching this a little before posting this thread, but came up with very inconsistent information.

another noob question: does one opamp have the same effect on different amps? for example, if i read on a fubar III thread that so-and-so amp gives better bass performance, will that be the same for the D1?
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post #6 of 23
1/2/08 at 2:58pm
It will most likely give a similar sound characteristic. For example, if X opamp is known for bass impact, it will probably increase the bass impact in Y amp, but the bass on two amps with the same opamp may not be the same.
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post #7 of 23
1/2/08 at 3:21pm
Thread Starter 
thanks, that's what i suspected.

is there a list of more "detailed" and less "boomy" opamps you can suggest? also, should i switch the opamps in the amp stage, buffer stage, or the DAC stage?
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post #8 of 23
1/3/08 at 1:03pm
I am very interested in figuring out how to opamp roll as well. If anyone finds a detailed walkthrough of how to do it and what parts/tools I will need, I would greatly appreciate it.

I've found all the forums that recommend with opamps to try, but have found very little to walk me through the process.

I love this forum but it's making me poor
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post #9 of 23
1/4/08 at 2:27am
Thread Starter 
ok, i'm interested in doing this combination:

L/R: AD797 (DIP)
Buffer: Bypass w/ dummy sockets
DAC: stock

I have a slew of questions:

Do I need a Brown Dog adapter if the AD797 is DIP? If so, can someone give me a link to a place that sells one? I'm having trouble finding one.
Where can I get the parts to make the dummy opamp shown in the link? Also, do the dummy opamps need a Brown Dog as well?
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post #10 of 23
1/5/08 at 1:01am
You need 2 AD797s along with a single-to-dual opamps adapter. You'd then solder two of these onto the adapter. Mount the AD797s on these.

My suggestion to you is, rather than futz with this, PM HiFlight. I purchased my adapter set and dummy buffer sockets from him. He's a very helpful guy and a pleasure to deal with.
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post #11 of 23
1/5/08 at 3:57am
Thread Starter 
thanks a bunch. i'll send him a pm. do i need a single-to-dual adapter for the DAC? also, do i just insert the dummy sockets straight into the sockets on the D1 or do i need a single-to-dual adapter? i've been trying to figure this out for a while.
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post #12 of 23
1/5/08 at 4:04am
Thread Starter 
haha found my answer for the last question, still searching for an answer to the first one....

"To summarize, if interested in trying this combo, one needs a 2-1 single to dual Browndog adapter (DIP), 4 sockets, 4 jumpers, and 2 AD797 DIP opamps. Soldering the sockets onto the adapter requires soldering 8 small pins that in are close proximity to each other. Solder bridges are NOT good! Once the sockets are done, the rest is quick and easy."
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post #13 of 23
1/5/08 at 4:34am
Quote:
Originally Posted by thislittlepiggy View Post
thanks a bunch. i'll send him a pm. do i need a single-to-dual adapter for the DAC? also, do i just insert the dummy sockets straight into the sockets on the D1 or do i need a single-to-dual adapter? i've been trying to figure this out for a while.
In the dac area, there's very little room and there are very good dual opamps to try. LT6241, LT6234 are very good. You don't need a single to dual adapter here as these are dual opamps. So one soic chip that you solder to a soic to dip browndog adapter and insert into the dac socket.

For the dummy sockets, no adapter is needed. Its just plug and play.

hope this helps.
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post #14 of 23
1/5/08 at 2:45pm
Thread Starter 
sweet, thanks for the info. excuse me while i experiment...
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post #15 of 23
1/18/08 at 8:39pm
Did you get your opamps switched out? I have the same observations as you, the D1 is light on the the bass.
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