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From: klein@ucbcad.UUCP (Mike Klein)
Newsgroups: net.audio,net.analog
Subject: What are the choice audio opamps these days?
Message-ID: <17@ucbcad.UUCP>
Date: Mon, 3-Jun-85 15:37:06 EDT
Article-I.D.: ucbcad.17
Posted: Mon Jun  3 15:37:06 1985
Date-Received: Sat, 8-Jun-85 01:43:37 EDT
Organization: UC Berkeley CAD Group, Berkeley, CA
Lines: 23
Xref: watmath net.audio:5065 net.analog:313

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I've been out of daily contact with opamps for a couple of years now,
and I'm wondering what the choice opamp of the serious audio designer
is these days.  Back a few years ago, there were some nice units from
Signetics (5534 or something like that), and National was in there with
the LM308 and LF341 or some such number.  You can tell it's been a while.

Requirements: low noise, fast slew (50 V/uSec) with realistic capacitive
load (.001 ?), fast closed-loop settling (1 uSec?), equal positive and
negative slew, high compensated unity-gain-bandwidth (> 10 MHz),
very very low crossover distortion, and no more than about $3 per amp.

This is for putting together some very high-quality active crossovers,
so there are going to be at least 3 opamps in the signal path.

Flames about sound purity ruined by opamps will be immediately redirected
to /dev/null.
-- 

		-Mike Klein
		...!ucbvax!ucbmerlin:klein	(UUCP)
		klein%ucbmerlin@berkeley	(ARPA)