Hi, I have got a oem printcard from the Norwegian "Embla" crossover designed by Tom Helgesen. He is an ex Tandberg designer, made there cd player and moore.
He used the TL072CP for the filter, I have spoken to him and he say I may try the OPA2134 as they are also FET.
Im gone use only the lowpass unit on the filter but build it as a complete filter.
For high freq the OPA2134 is suppose to beat the TL072 in performance, I have read ( :
Go for TL072 or OPA2134?
Frank
He used the TL072CP for the filter, I have spoken to him and he say I may try the OPA2134 as they are also FET.
Im gone use only the lowpass unit on the filter but build it as a complete filter.
For high freq the OPA2134 is suppose to beat the TL072 in performance, I have read ( :
Go for TL072 or OPA2134?
Frank
I’d probably use the TL072. The (much) improved specs on the 2134 probably won’t show up in a low pass and you can save $$ for using the better opamp where it will make more difference.
This is probably not a decision to lose sleep over 😊.
Just for fun I swapped a tl072 for a 5532 in a baffle step filter to see if I could hear a difference. Even with sighted testing I’m not sure there was an audible difference at normal listening levels although there are reports on this forum that replacing a long chain of opamps does alter the sound signature sufficiently for the opamp to be identifiable.
This is probably not a decision to lose sleep over 😊.
Just for fun I swapped a tl072 for a 5532 in a baffle step filter to see if I could hear a difference. Even with sighted testing I’m not sure there was an audible difference at normal listening levels although there are reports on this forum that replacing a long chain of opamps does alter the sound signature sufficiently for the opamp to be identifiable.
