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RE: Looking forward to updates here too......

73.229.163.4

In Reply to: RE: Looking forward to updates here too...... posted by cawson@onetel.com on July 18, 2023 at 14:20:17

Have you used that amp switcher before with your M33 ? It could possibly cause a problem if the switcher uses a common ground but I'm not sure. NAD warns against grounding the blue speaker terminals.

M33 Manual Page 9 that I found on the internet:
IMPORTANT NOTES
- The blue terminals must never be connected to ground (earth).
- Never connect the blue terminals together or to any common ground device.
- Do not connect the output of this amplifier to any headphone adapter,
speaker switch or any device that uses common ground for left and
right channels.

If you use the amp switcher [speaker output switcher?] you might want to power-OFF both amps for several seconds before you switch then power-ON only the amp under test.

Edits: 07/19/23

Follow Ups:

RE: Looking forward to updates here too...... - cawson@onetel.com 14:09:55 07/19/23 (1)
Thanks for the advice. Before buying the Beresford TC-7220 Mk III switcher, I checked with Mr Beresford who confirmed that no input is earthed and the action of switching is "break before make", so the 2 amps are never connected to one another. However the advice is to switch while no music is playing. Peter
- RE: Looking forward to updates here too...... - AbeCollins 20:29:45 07/19/23 (0)
  Excellent. That switcher should make for easy comparison w/o having to wrestle with cables.

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