[Sonnova]

In an earlier post, I mentioned upgrading a Crown IC-150 pre-amp by replacing
the original LM301 op amp with a new National Semiconductor LM4562NA. It's
been a number of years since I owned an IC-150 and I had forgotten that the
LM301 is a SINGLE op amp package and the LM4562 is a DUAL op amp package. The
correct modern, low noise, high-slew rate and symmetrical-slew operational
amplifier to replace the old, noisy, slow, non-symmetrical slew rate LM301
with is the National Semiconductor LME49710NA which is the 8-pin mini-dip
single op amp version of the LM4562. The LME49710NA IS a direct drop-in
replacement for the LM301/LM301A 8-pin mini-dip packaged use in the Crown and
I'm sure that it will noticeably improve the pre-amps performance. Even
though I haven't done this modification, I once did own an IC-150, and I did
replace the LM301 with then new National Semiconductor FET input op amps and
the result was much better sound and I recently replaced a pair of Burr-Brown
OPA134s in my 24-bit D/A converter with the LME49710NAs and heard a big
improvement, especially in the noise floor and perceived distortion. So, I'm
pretty confident that replacing the ancient, wheezing LM301s in an IC-150
will yield similar results. I don't actually suspect that my misstatement
has caused anyone any inconvenience, but in the interest of accuracy, I did
want to correct my error.