Svart
Well-known member
opa2134 for 5532 and opa134 for 5534. For the OPA parts you usually use this designation:
OPA 2(number of amps) 134(model)
so 2134 is 2 opamps of the 134 model.
the 134 can drive slightly more than the 604 in my testing.
I like the 134 series better than the 604. the 604 can sound honky in certain circuits where the 134 has always sounded the same to me. It's much brighter than the 5532 but the mids are slightly scooped in the 134. so you get better highs but worse mids, that is why the 5532 is so beloved in most apps because the mids are very clear and detailed.
I used 5532s in class A in all buffer applications and 2134s in my EQ applications because of the gyrator's need for fast opamps.
It's also a WHOLE LOT easier to swap in a FET input opamp(opa134, opa604) with success than swapping a BJT input opamp into something designed for a FET input. Check out the threads on this for the reasons.. hint: BJT input current can cause DC offset on the outputs.. Jfets don't do this nearly as much..
OPA 2(number of amps) 134(model)
so 2134 is 2 opamps of the 134 model.
the 134 can drive slightly more than the 604 in my testing.
I like the 134 series better than the 604. the 604 can sound honky in certain circuits where the 134 has always sounded the same to me. It's much brighter than the 5532 but the mids are slightly scooped in the 134. so you get better highs but worse mids, that is why the 5532 is so beloved in most apps because the mids are very clear and detailed.
I used 5532s in class A in all buffer applications and 2134s in my EQ applications because of the gyrator's need for fast opamps.
It's also a WHOLE LOT easier to swap in a FET input opamp(opa134, opa604) with success than swapping a BJT input opamp into something designed for a FET input. Check out the threads on this for the reasons.. hint: BJT input current can cause DC offset on the outputs.. Jfets don't do this nearly as much..