Rap 'n Tap
[ Home | Contents | Post | Reply | Next | Previous | Up ]
From: John Freiberger
Date: 1/4/01
Time: 12:04:44 AM
Remote Name: 24.161.70.62
I've never been successful using audio ICs barefoot in a differential mode. Instead I've employed a 741 op-am to drive a single-ended LM386 to levels sufficient for outboard speakers. Paul Harden enhanced the original Kitchin design back in '96 with a 2N2222 phase splitter ahead of L1 to provide a true differential mode. He reports that: "a phase splitter to drive U1 differentially, does seem to lower overall noise level and provides slightly better fidelity." I haven't tried to verify his results.
John Freiberger