Thank you David and Fran. I checked the stacked knob for tightness to the shaft and it seems proper. I think it is my hearing loss that best explains the situation. The doctor says my right ear is 90% gone and the left has 65% hearing loss. I do wear hearing aids but it is still a major handicap. So if I understand correctly, it will be best to keep the treble or upper knob fully flat which seems to me to be fully counter clockwise for a left handed bass. Correct me if I'm wrong. The volume pot increases in volume as the knob is turned clockwise on my bass so I'm thinking that the treble is full on clockwise and flat when totally counter clockwise.
Thanks for the number Fran. I'm proud to be a club member.
Mike
This is correct. The concentric bass (large) and treble (small) knobs are 'boost only' and are basically 'out of the system' when turned completely counter clockwise.
The 'basic', neutral setting of the Sadowsky pre is:
Volume... all the way up
VTC.... all the way up (i.e., out of the circuit)
Blend... at the center detent point (remember, this blend control is wired opposite of most, favoring the bridge pickup, for example, when turned clockwise from center)
Tone controls.... totally counter clockwise (i.e., out of the circuit.
Your not being able to really hear the treble control is, as you state, probably part of a hearing issue on your part. However, if you are using a rig without a tweeter, your rig also is probably not reproducing a lot of that 4K+ frequency range that the treble control is boosting.
The Sadowsky basses are quite bright inherently. I've never used the treble boost myself, and I like a bright tone. Just leave it off, and add a bit of bass boost (typically no more than 20% ever) to fatten the low end a little bit when needed.
Enjoy!