"Phil Allison" wrote in message
...

"William Sommerwerck"

I don't know /exactly/ what your plans are, but the 1kHz corner
frequency
is
about the worst possible if you're trying to correct errors in the
speakers
you're designing.

Unless you want a "tone control" that produces shrill treble and boomy
bass, you need to move the treble corner up, and the bass down.

Furthermore, it would make sense to design the speakers first, and see
what
sort of correction they need. There are plenty of inexpensive drivers
with
relatively flat response (if you believe the spec sheets). Neither they
nor
most recordings will need much in the way of correction, so the best
tone
control would be one that supplies small amounts of boost and cut at the
frequency extremes.

Unless you're looking for lots of boom and sizzle.

There are plenty of op-amps with a wider voltage range -- the 5534 and
TL-074 come to mind, but these are rather old designs. I'm sure someone
will be able to recommend something newer.

** Every single notion expressed by this congenital ****** is wrong.
In each case, the opposite is true.

When Mr Allison deigns to speak courteously, he is almost always a fount of
useful wisdom. (Seriously.)

But he is completely wrong. I have given good advice. Ignore it at your own
peril.