Thanks a lot, AudioCats, for your explainations. Looks like the AD8599 might be very well worth the try - if for nothing else, then for the subwoofer opamp.
From what I read it sounds that the bass line is great with this one, right? Better with more details that from LM4562, right?
You are right. But this thing will be in the subwoofer case, so the vibrations migh have lethal impact on any sockets... so it will be just for testing.
But you avoided the main question - or I put it very wrong, as my vocabulary is limited and english is not my main language anyway
The main question is - could any opamp in my amp do any reasonable difference when in the X-Fi that act as source of the audio incomming utilizing the 4 pieces of LM4562?
I mean - when the previous opamps is LM4562 - could opamps AFTER them matter noticably? I must say that I'm a bit skeptical about it... if something is broken (eg. the signal is not as good, as it can be from the X-Fi itself - as majkel put it so straightforward - "both OPA2134 and especially LM4562 are total sonic crap" ) already, then any attempt of fixing it could have only minimal impact...
So in the end, the most easy replacement - a 4pcs of the LM4562 - could be still a reasonable solution.
Still it should sound better that with the current NJM4558 ... right?
majkel - hmmm, I was under the impression that the LM4562 is a very good opamp? At least from reading the http://www.head-fi.org/forums/f46/ho...no-56k-226975/ X-Fi mod guide. Do I got it wrong and should I consider replacing the X-Fi opamps once again?
And the AD8599 seems to be produced only in the SOIC package - witch is idea for X-Fi, but far less ideal the the SW-5.1 HT, as it utilize DIP opamps. Four of them.
AudioCats -
Interesting idea. I do have to admit that I considering large amount of capacitor removal/exchange/upgrade with the amplifier. I got plenty of experience with soldering and modificating stuff, however mostly only computers ... so I did not modify amplifier before. I made some as student, but these times are long behind...
And I do have so many questions about modification of the circuits. Should I start another thread - eg. How to modify the Genius SW-5.1 HT audio circuit, or we can deal with it there?
I wonder if anyone can critically look at the proposed modifications by me. nd of course, since I'm a bit audio n00b, then suggest a nice decoupling caps as well - if even need.
I still believe that I should remove as many decoupling caps, as possible. In the L, R, RL, RR and CENTER channels are utilized 3 decoupling caps per channel (WTF!!!) and in the SW channel - well - there is 5 decoupling caps along the line!
This is NUTS, in my opinion. But I could be wrong, of couse... that is why I asking, so, thanks for your opinions
From what I read it sounds that the bass line is great with this one, right? Better with more details that from LM4562, right?
Quote:
| it is hard to say if the 8599 won't work great for electronics and guitar stuff in your system. I'd say install a DIP socket and try them both and see which one you like more |
But you avoided the main question - or I put it very wrong, as my vocabulary is limited and english is not my main language anyway
The main question is - could any opamp in my amp do any reasonable difference when in the X-Fi that act as source of the audio incomming utilizing the 4 pieces of LM4562?
I mean - when the previous opamps is LM4562 - could opamps AFTER them matter noticably? I must say that I'm a bit skeptical about it... if something is broken (eg. the signal is not as good, as it can be from the X-Fi itself - as majkel put it so straightforward - "both OPA2134 and especially LM4562 are total sonic crap" ) already, then any attempt of fixing it could have only minimal impact...
So in the end, the most easy replacement - a 4pcs of the LM4562 - could be still a reasonable solution.
Still it should sound better that with the current NJM4558 ... right?
majkel - hmmm, I was under the impression that the LM4562 is a very good opamp? At least from reading the http://www.head-fi.org/forums/f46/ho...no-56k-226975/ X-Fi mod guide. Do I got it wrong and should I consider replacing the X-Fi opamps once again?
And the AD8599 seems to be produced only in the SOIC package - witch is idea for X-Fi, but far less ideal the the SW-5.1 HT, as it utilize DIP opamps. Four of them.
AudioCats -
Quote:
| when I was doing the test, the output capacitors were not audio grade boutique caps. With sharp/cold sounding boutique caps (such as Kimber) for output, the 8599 can sound quite nice for electronics music |
And I do have so many questions about modification of the circuits. Should I start another thread - eg. How to modify the Genius SW-5.1 HT audio circuit, or we can deal with it there?
I wonder if anyone can critically look at the proposed modifications by me. nd of course, since I'm a bit audio n00b, then suggest a nice decoupling caps as well - if even need.
I still believe that I should remove as many decoupling caps, as possible. In the L, R, RL, RR and CENTER channels are utilized 3 decoupling caps per channel (WTF!!!) and in the SW channel - well - there is 5 decoupling caps along the line!
This is NUTS, in my opinion. But I could be wrong, of couse... that is why I asking, so, thanks for your opinions
