Opamps for active crossover/filter

[harvardian]

Hello,

I am building the Linkwitz active crossover boards and the chosen opamp is the BB OPA2134. Has anyone tried a LM6172 or LT1364 in this application? Besides for oscillation worries, which would work better?

Thanks,

Dale

 

[ThomasW]

Apples vs oranges depends which you prefer.

My choice is OPA-2604's

 

[Jamie F]

I've built the Phoenix crossovers using the 2134's and they are fine.

However, one of the engineers at work recently did a shoot-out, these came second, something else (I'll find out what next week) came first due to noise performance.

 

[Nelson Pass]

I recently tried 2604's in a crossover design, but
I found them only marginally stable in low gain
circuits, and I went right back to discrete.

 

[wuffwaff]

Hi,

another nice sounding dual-opamp is burr browns OPA2107

william

 

[djk]

"I recently tried 2604's in a crossover design, but
I found them only marginally stable in low gain
circuits, and I went right back to discrete." A while back Analog Devices was having a problem with their AD797s.Supposed to be unity gain stable.They weren't.Just return to the distributor and get a different date code.On a scary note I have a circuit that uses the AD842 at unity gain.This is not a unity gain stable part.About 1/3 of the date codes will actually work over temperature.Don't try this at home.

 

[AudioFreak]

How does the National LF411ACN fair?

 

[grataku]

Tried the lm6172 they seem to be working fine.
If I were to do it over I would buy something else, definitely something cheaper.

 

[joe]

Tried the LM6172 in my CDP (i/u conv. + filter) and found it much better sounding than the opa2134 if it is stable.

Here my personal ranking (tested in outputstage, gain 10):

Standard: NE5532, JRC...

For Beginners: OPA2604

Better: OPA2134; OP275

Premium: OPA2132

State of the Art: LM6172, OPA627/637, AD797 (the latter three are single opamps)

 

[tvi]

<a href="http://fnt-www.ss.titech.ac.jp/~hajime/uec/distortion/opa.html"> here</a> is a japanese site that has distortion/FFT plots of lotsa opamps, the AD797 measured great.

Regards
James

 

[AudioFreak]

Is it ok to use the National LF411ACN???

Are they unity gain stable?