You'd really have to build and measure it - Ralph - OTL Asylum

OTL Asylum

OTL, Output Transformerless Amplifier User Group.

You'd really have to build and measure it

In Reply to: RE: This really sounds like a crossover issue; here's something to consider posted by lotsmorebetter1 on May 12, 2023 at 13:36:11:

but I suspect that the ZOBEL network won't be needed in the context of a crossover. A lot will depend on the impedance curves of the drivers in question.

If the amplifier has no feedback, even with an output transformer you'll run into frequency variation due to load variation.

Some speakers are designed to expect a higher output impedance from the amplifier (IOW an amp with no feedback) as the assumption there is that the brain pays more attention to tonality induced by distortion than it does to tonality caused by frequency response errors. Of course, keeping in mind that all speakers have profound FR errors all by themselves.

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Follow Ups Full Thread

Topic - otl amps/speakers and zoebel networks - lotsmorebetter1 18:44:01 05/08/23 (8)

You may not have an output coupling cap- many OTLs don't. - Ralph 10:27:02 05/11/23 (7)

RE: You may not have an output coupling cap- many OTLs don't. - lotsmorebetter1 14:17:30 05/11/23 (6)

RE: You may not have an output coupling cap- many OTLs don't. - lotsmorebetter1 10:32:18 05/12/23 (4)

This really sounds like a crossover issue; here's something to consider - Ralph 10:47:27 05/12/23 (2)

RE: This really sounds like a crossover issue; here's something to consider - lotsmorebetter1 13:36:11 05/12/23 (1)

You'd really have to build and measure it - Ralph 13:56:11 05/12/23 (0)

RE: You may not have an output coupling cap- many OTLs don't. - lotsmorebetter1 10:33:40 05/12/23 (0)

That's correct. - Ralph 09:03:52 05/12/23 (0)

Follow Ups

You'd really have to build and measure it - Ralph 13:56:11 05/12/23 (0)

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