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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Op-amps - implementation? 5532? (Jon? Anyone?) posted by Ecaroh on April 30, 2006 at 17:54:33:
The NE5532 can be sound decent IF it is correctly implemented, which usually involves some really good PS decoupling, low Z PS traces and ground, and proper impedance scaling for the input and feedback resistors.Most of that will not adversely impact an OPA-2604, but IF the resistors are properly impedance scaled, then the OPA-2604 would IN THEORY, be at a slight idsadvantage n terms of noise. However, I can say that in the real world, I have never heard this to be a problem, as the specs simply do not tell the whole story. In most all drop-in replacement situations, the OPA-2604 did not sound any noiser, and in some cases, it sounded quieter than the 5532.
The big thing the 5532 has going for it, IF properly implemented, is that it can drive low Z and high C loads much better than most other op-amps, but the OPA-2604 can ALSO do this, and do it with less sonic stress. As someone else noted, there is a huge price difference when looking at manufacturing quantities.
In some circuits, the OPA-2134/32 can sound as good, or even a little better, but they can tend toward mercilessly accurate (read: nasty) compared to an OPA-2604. Too much of a good thing....
The OPA-2132/34 seem to require even better PS decoupling and lower PS Z than the 5532 in order to sound really good, and in this sense, they do not make a very good drop-in, EXCEPT where the 5532 is already shining sonically. Same caveats re the resistor scaling for the 2604.
Jon Risch
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Follow Ups
- Re: Op-amps - implementation? 5532? (Jon? Anyone?) - Jon Risch 21:59:31 05/02/06 (1)
- Thanks, Jon, great information (nt) - Ecaroh 10:40:53 05/05/06 (0)
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