Thank you for that!
I´ll work sommehing out for that headphoneamp.😉
That´s just a test for the Lm4562 if I can use it in other equipment.
really? Your the man. What I am trying to do is add two stereo channels to a PCI shield. So I need 4 inputs. Or two stereo pairs. Do you understand what I mean? I want to add something that look like this to my PCI slots..
[ oo oo ]
One will be stereo AUX in and the other is stereo CD in.
I appreciat your teying to find these for me but if you can;t don;t worry about it...I do appreciate it though thx.
[ oo oo ]
One will be stereo AUX in and the other is stereo CD in.
I appreciat your teying to find these for me but if you can;t don;t worry about it...I do appreciate it though thx.
OPA2134 vs LM4562
My chips arrived this morning with no problems. Thanks Dennis.
It was beautifully packed !
Had to try out the chips immediately. I guess a quick check is no good but there will always be a first impression.
I have a Zaholu V2.5A DAC with sockets on the filter board. So its easy to swap out chips. It came with a pretty good chip the LT1057 which I changed for a pair of OPA2134. I like these better by a small margin.
The LM4562 and OPA2134 were swapped in and out several times. I don't think my OPA2134 got any better with time and so I expected the LM4562 to behave the same way. I did however let it run 30 minutes before starting any listening comparison.
The LM sounds good . However some things about the sound are quite different from the OPA. Low level separation of sounds are very similar in both chips. Bass on the OPA seems a bit more extended ( or present ) . I can't say which is more accurate.
I certainly like voices better on the OPA2134 ! I've just used one CD right now . Linda Ronstadt - Winterlight . Her voice sounds more lush on the OPA2134. The LM seems to remove some of the breath intake and other sounds that make the voice "live" .
I almost get the feeling that very low level ambience is removed by the LM chip. It can't be , but I seems to sound that way right now. I must give it some time I guess.
Piano on the other hand " might" have a bit more bite to it.
So first verdict in MY system is that the LM and OPA are very close to each other and right now the OPA is my prefered chip.
For people who prefer more bite like in Jazz music the LM might do a shade better (?) !. The LM is a very good chip in any case.
Application could make a huge difference .
Cheers,
Ashok.
My chips arrived this morning with no problems. Thanks Dennis.
It was beautifully packed !
Had to try out the chips immediately. I guess a quick check is no good but there will always be a first impression.
I have a Zaholu V2.5A DAC with sockets on the filter board. So its easy to swap out chips. It came with a pretty good chip the LT1057 which I changed for a pair of OPA2134. I like these better by a small margin.
The LM4562 and OPA2134 were swapped in and out several times. I don't think my OPA2134 got any better with time and so I expected the LM4562 to behave the same way. I did however let it run 30 minutes before starting any listening comparison.
The LM sounds good . However some things about the sound are quite different from the OPA. Low level separation of sounds are very similar in both chips. Bass on the OPA seems a bit more extended ( or present ) . I can't say which is more accurate.
I certainly like voices better on the OPA2134 ! I've just used one CD right now . Linda Ronstadt - Winterlight . Her voice sounds more lush on the OPA2134. The LM seems to remove some of the breath intake and other sounds that make the voice "live" .
I almost get the feeling that very low level ambience is removed by the LM chip. It can't be , but I seems to sound that way right now. I must give it some time I guess.
Piano on the other hand " might" have a bit more bite to it.
So first verdict in MY system is that the LM and OPA are very close to each other and right now the OPA is my prefered chip.
For people who prefer more bite like in Jazz music the LM might do a shade better (?) !. The LM is a very good chip in any case.
Application could make a huge difference .
Cheers,
Ashok.
Attachments
An update
I left the system on all afternoon.
Now in the evening I made some comparisons again.
I still feel the OPA sounds a little more real than the LM in voice reproduction.
However the LM seems to be cleaner in hf sounds like say the shimmer of cymbals or attack of the kettle drum. Piano's also have more leading edge bite like the real thing.
On the LM voices are clean but seem a bit "harder (?)" . Just a shade . It doesn't make it sound 'bad or worse' , just different .
The LM4562 is a very good chip and I'm glad I bought some.
Wonder how they will compare in a standard preamp configuration.
In my test they are used as low pass filters after a DAC.
Cheers.
I left the system on all afternoon.
Now in the evening I made some comparisons again.
I still feel the OPA sounds a little more real than the LM in voice reproduction.
However the LM seems to be cleaner in hf sounds like say the shimmer of cymbals or attack of the kettle drum. Piano's also have more leading edge bite like the real thing.
On the LM voices are clean but seem a bit "harder (?)" . Just a shade . It doesn't make it sound 'bad or worse' , just different .
The LM4562 is a very good chip and I'm glad I bought some.
Wonder how they will compare in a standard preamp configuration.
In my test they are used as low pass filters after a DAC.
Cheers.
Personally I haven't tried out the LM4562's mine are still on order. I never did like the OPA2134's though. They sound "alright" but nothing great. I like the OPA2227 and the OPA2107 better. I think it does depend alot on what circuit you put the amps into. Your the first person who said the LM4562's weren't "awsome" -I find it takes a while to learn the amps sound alot of things are very subtle -to me anyway.
THX for your review.
THX for your review.
Hello all,
With my trip to the post office this morning, the last of
the orders has gone out.
ROBSCIX: I threw in four RCA jacks. Hope they are
appropriate to you needs.
Cheers,
Dennis
With my trip to the post office this morning, the last of
the orders has gone out.
ROBSCIX: I threw in four RCA jacks. Hope they are
appropriate to you needs.
Cheers,
Dennis
Hi ROBSCIX,
Yes I have seen guys who do not like the 2134 much. I haven't had a chance to try out the OPA2227 and OPA2107. After my post I tried the OPA2604 and LT1057 . The 4562 still didn't sound awesome in comparison.
But you are correct that it will take some time to appreciate it's strengths. However I still think that it is good but not awesome like it can be in some situations depending on the sound of the previous implementation.
On a scale of 1 to 10 , I think that all these chips would be above 9 in my application. So none can be awesome against the others !
In some other circuit and implementation it could be very different !
Cheers.
Yes I have seen guys who do not like the 2134 much. I haven't had a chance to try out the OPA2227 and OPA2107. After my post I tried the OPA2604 and LT1057 . The 4562 still didn't sound awesome in comparison.
But you are correct that it will take some time to appreciate it's strengths. However I still think that it is good but not awesome like it can be in some situations depending on the sound of the previous implementation.
On a scale of 1 to 10 , I think that all these chips would be above 9 in my application. So none can be awesome against the others !
In some other circuit and implementation it could be very different !
Cheers.
Thx alot Dennis, I really appreciate you adding in those jack. That was very nice of you. I will let you know when the package has been received.
I have to say that in my headphone amp I'm not very fond of the opa2134 at all. The LM4562 on the other hand does the job quite a lot better, even my younger sister (15) said that the LM4562 sounded a lot better then the OPA2134 when I changed between the two. It's probably a matter of preference and what the chip will be used for too though. In this application the LM4562 is really, really good though!
Dennis,
Recieved the package. Very wel packed.
I really apriciate the effort you put in to it.
Thanks.
Groeten Gert-Jan
Recieved the package. Very wel packed.
I really apriciate the effort you put in to it.
Thanks.
Groeten Gert-Jan
I found the LT1057 closer to the LM4562 than the OPA2134 in transient sounds.
Kettle drum particularly has a bit more impact than the OPA2134.
However all this could be due to the fact the chips are in an active LP filter circuit. The load on it is a 20K volume control and possibly 150pF of cable capacitance. The filter itself uses low value resistors ( below 10 K ohms ).
What contributes to better transients in this case?
Only the GBWP is significantly higher ( 55Mhz) in the LM4562 than the other two chips. But the LT1057 is only 5Mhz but sounds pretty close to the LM4562 while the OPA2134 which sounds slightly softer has a GBWP of 8 Mhz.
Anyone ?
Cheers.
Kettle drum particularly has a bit more impact than the OPA2134.
However all this could be due to the fact the chips are in an active LP filter circuit. The load on it is a 20K volume control and possibly 150pF of cable capacitance. The filter itself uses low value resistors ( below 10 K ohms ).
What contributes to better transients in this case?
Only the GBWP is significantly higher ( 55Mhz) in the LM4562 than the other two chips. But the LT1057 is only 5Mhz but sounds pretty close to the LM4562 while the OPA2134 which sounds slightly softer has a GBWP of 8 Mhz.
Anyone ?
Cheers.
Does the opamp we use make any difference in filter circuits? I know there is a huge difference for headphone amps and buffer stages, but what about filter circuits? For my analog speaker crossover, I'm thinking of saving my LM4562s and using NE5532s instead, so I heard that the opamp makes no difference there.
Until someone who knows exactly which specs cause which differences in sound tells us , you will probably have to try out the different chips in your application - whatever it is.
In filter circuits the response in the HF region will not follow the theoretical curve due to opamp limitations. Usually this is beyond the audio bandwidth . Does it matter ? Try it out !
Cheers.
In filter circuits the response in the HF region will not follow the theoretical curve due to opamp limitations. Usually this is beyond the audio bandwidth . Does it matter ? Try it out !
Cheers.
- Status
- Not open for further replies.