ctm
100+ Head-Fier
- Joined
- Oct 12, 2004
- Posts
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Dear members,
I was referred to this sub-forum as in case some of you have extensive experience with opamps...
The topic recently got my attention when a fellow member and experienced and successful DIY builder of a number of different types of amps commented on the op-amp TL074 from Texas Instruments. He noted that this could be replaced with an OPA1604, an audio op-amp having over 100X less distortion than the TL074. He further went on to say that there are also other possibilities for op-amps such as these 4 channel versions: OPA1664, OPA1644, OPA1654, OPA4134, OPA4227, AD8273, and OPA4172. However, he admitted he has never done any rolling of opamps so cannot comment on the subjective sound differences.
The TL074 is the one used in my HEV70, which may be refurbished by said builder. If this proceeds as planned, he may also be swapping out some electrolytic caps and, if warranted, may also look into building a robust external power supply.
We would greatly appreciate whatever comments and recommendations you have on the opamp alternatives listed above or any others worthy of consideration. Also, if you know any others who have extensive and long time experience with a wide range of opamps, but does not frequent the DIY community on this site, then please let us know.
Thanks & best regards!
I was referred to this sub-forum as in case some of you have extensive experience with opamps...
The topic recently got my attention when a fellow member and experienced and successful DIY builder of a number of different types of amps commented on the op-amp TL074 from Texas Instruments. He noted that this could be replaced with an OPA1604, an audio op-amp having over 100X less distortion than the TL074. He further went on to say that there are also other possibilities for op-amps such as these 4 channel versions: OPA1664, OPA1644, OPA1654, OPA4134, OPA4227, AD8273, and OPA4172. However, he admitted he has never done any rolling of opamps so cannot comment on the subjective sound differences.
The TL074 is the one used in my HEV70, which may be refurbished by said builder. If this proceeds as planned, he may also be swapping out some electrolytic caps and, if warranted, may also look into building a robust external power supply.
We would greatly appreciate whatever comments and recommendations you have on the opamp alternatives listed above or any others worthy of consideration. Also, if you know any others who have extensive and long time experience with a wide range of opamps, but does not frequent the DIY community on this site, then please let us know.
Thanks & best regards!