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Ted Kendall · 4th Dec 2021, 1:41 pm

The other point here is that the FM4's output capacitor is specified on the assumption of standard input impedance on the 34/44. If this is lowered, the bass rolloff frequency rises, as some have found when running an FM4 into other amplifiers.

4th Dec 2021, 1:41 pm	#56
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,671	Re: Quad 34 preamp volume knob clicks The other point here is that the FM4's output capacitor is specified on the assumption of standard input impedance on the 34/44. If this is lowered, the bass rolloff frequency rises, as some have found when running an FM4 into other amplifiers.