Do i have a problem!!

Deaky · #1 08-01-2011, 02:05 PM

Hi guys

Just looking for some help with my Fender American pbass deluxe please..

When I play the bass in passive mode and turn the knob right back I notice quite a drop in volume. Is that normal?
When I have the volume on the bass up full it doesn't happen, just when it's bout half way up!

Is it something I should see a tech about or is this normal?

Thanks to all

Stuart

SGD Lutherie · #2 08-01-2011, 04:17 PM

Are you talking about the volume knob? Turning down the volume knob would create a drop in volume.

It might be more of a drop when in passive mode because the volume control is no longer buffered.

Deaky · #3 08-02-2011, 07:13 AM

No it's it's when I turn the tone knob down. But it doesn't happen when the volume is on full...

SGD Lutherie · #4 08-02-2011, 08:21 AM

That's normal actually.

Deaky · #5 08-02-2011, 08:23 AM

Great. It's not too bad but I need to increase the volume a tad to compensate if I roll the tone right back...

SGD Lutherie · #6 08-02-2011, 08:26 AM

You should leave the volume knob on ten anyway.

Deaky · #7 08-02-2011, 08:42 AM

Yeah I do most of the time it was just by chance a had it a little lower and ogives the change. Is there a particular reason why it happens?

Jay2U · #8 08-02-2011, 01:36 PM

If the pick-ups are to feed signal into a connected amp or box or pedal, it has to drive signal into a certain impedance. The lower the impedance, the more signal is being lost. If, however, a pre-amp buffers the pick-ups, the output impedance of your bass drops significantly, enabling it to drive connected equipment (almost) without this loss.

Deaky · #9 08-02-2011, 01:58 PM

I see..so that's why there is a slight loss of volume when the tone is rolled back??

Jay2U · #10 08-03-2011, 10:51 AM

Quote:

Originally Posted by Deaky

I see..so that's why there is a slight loss of volume when the tone is rolled back??

Yes, I think so.