RE: 4 ohms vs. 8 ohms - Lowers Supply rails

Posted by BigguyinATL (M) on March 15, 2012 at 06:57:05

In Reply to: 4 ohms vs. 8 ohms posted by JefferyK on March 14, 2012 at 21:28:34:

so that the Amplifier can pass the rigorous (and largely irrelavant) continous power test with out blowing up. For music, even for 4 ohm speakers use the 8 ohm setting. This optimizes you clipping point.

There is an exception to this, however: If your loudspeaker has a extreme reactivity - greater than 45 degree in the lower frequencies you should set to 4 Ohm (even with a 6 Ohm speaker)

Note: For McIntosh Autoformer or Tube Amp Transformers with multiple taps - it's more relavent - to match the impedance for optimum power transfer efficiency - or to just listen to what sounds good.
"The hardest thing of all is to find a black cat in a dark room, especially if there is no cat" - Confucius

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Follow Ups Full Thread

Topic - 4 ohms vs. 8 ohms - JefferyK 21:28:34 03/14/12 (18)

RE: 4 ohms vs. 8 ohms - Lowers Supply rails - BigguyinATL 06:57:05 03/15/12 (2)

Now that you mention it... - Presto 11:57:48 03/15/12 (1)

RE: Most the time... lower rail voltage. - BigguyinATL 06:46:09 03/16/12 (0)

Lower Voltage - djk 02:50:41 03/15/12 (0)

RE: 4 ohms vs. 8 ohms - Presto 21:59:32 03/14/12 (13)

RE: 4 ohms vs. 8 ohms - JefferyK 22:04:04 03/14/12 (12)

RE: 4 ohms vs. 8 ohms - Presto 10:36:34 03/15/12 (0)

RE: 4 ohms vs. 8 ohms - JefferyK 22:16:01 03/14/12 (10)

RE: 4 ohms vs. 8 ohms - jseverino50 22:19:44 03/14/12 (9)

What B.L.Zeebub said... :o) - Presto 10:40:13 03/15/12 (3)

RE: What B.L.Zeebub said... :o) - Pro Sound Guy 11:08:18 03/15/12 (1)

RE: What B.L.Zeebub said... :o) - Presto 12:01:21 03/15/12 (0)

RE: What B.L.Zeebub said... :o) - JefferyK 10:42:11 03/15/12 (0)

RE: 4 ohms vs. 8 ohms - b.l.zeebub 01:47:46 03/15/12 (1)

RE: 4 ohms vs. 8 ohms - michaelhigh 10:16:03 03/16/12 (0)

This question, as many is answered by: Set it to what sounds best to YOUR ears.. nt - Elizabeth 23:59:59 03/14/12 (2)

I disagree to an extent. - Presto 10:03:51 03/15/12 (1)

RE: I disagree to an extent. - Pro Sound Guy 11:09:44 03/15/12 (0)

Follow Ups

RE: 4 ohms vs. 8 ohms - Lowers Supply rails - BigguyinATL 06:57:05 03/15/12 (2)

Now that you mention it... - Presto 11:57:48 03/15/12 (1)

RE: Most the time... lower rail voltage. - BigguyinATL 06:46:09 03/16/12 (0)

RE: 4 ohms vs. 8 ohms - Lowers Supply rails

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