I’ll reiterate again: Taking a high level output from a Tube Amp is a bad idea.
The speaker impedance controls the LEVEL INPUT TO THE SUB.
See http://www.ielogical.com/assets/Audio/TubeAmpSpkrV.png
The input to the sub is ≈7.7db lower at 20Hz than 60Hz. Blecchh !!
SS amps will exhibit considerably less change, but are NOT immune to LS impedance.
Current which drives the LS is not in phase with the voltage which drives the sub. The sub introduces its own phase errors which is why ALL subs need Continuous Phase and Polarity controls. Without them, unless the sub was engineered for the system, it’s a crap shoot. Mostly crap!
ROLL THE LOW END FROM THE MAINS AND USE THE LOW LEVEL INPUT !!!
The speaker impedance controls the LEVEL INPUT TO THE SUB.
See http://www.ielogical.com/assets/Audio/TubeAmpSpkrV.png
The input to the sub is ≈7.7db lower at 20Hz than 60Hz. Blecchh !!
SS amps will exhibit considerably less change, but are NOT immune to LS impedance.
Current which drives the LS is not in phase with the voltage which drives the sub. The sub introduces its own phase errors which is why ALL subs need Continuous Phase and Polarity controls. Without them, unless the sub was engineered for the system, it’s a crap shoot. Mostly crap!
ROLL THE LOW END FROM THE MAINS AND USE THE LOW LEVEL INPUT !!!
