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** You have some hearing damage ?Or is that what some dopey "audioligst" told you.
** The transformers are nasty cos they have no low end.IIRC, the spec reads " 250Hz to 15kHa +/- 2db. "
Typically the low end ( ie all the bass ) will be riddled with core saturation distortion too - so massive IM of the whole audio band.
A radio ham built it...
..... Phil