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Active pickups are typically "hi-z" (hi impedence)...sort
of like an active microphone. Old-school (ie P-Bass and
Gibson)are "passive" pickups also called "low-z" (low
impedence).
Often, bass amps have an "active" (hi-z) input and a
"passive" (low-z) input. Sometimes there is a hiZ/LoZ
switch. Does your Mesa have either feature? Sometimes this
is also refered to as the "line level" switch...
BUT CHECK THIS OUT, it may be something as simple as a
nearly dead 9-volt battery in your Stingray. Or, could be
flourescent lights interfering with your active pickups.
good luck, bass dude
-dp
PS: I'm glad that you narrowed down your problem...and I'm
glad your passive basses all sound great through your amp
setup...a very good sign
--- Richard <> wrote:
>
>
> I've discovered the source of the noise--it's the
> active pickups on the Ernie Ball Stingray I'm using.
> I tested the head at my amptech's through a great big
> 2x15 and a Gibson passive bass. Great sound, cranked
> it all I wanted, no noise.
>
> Got back to the practice space, warmed her up good and
> plugged both cabinets into the 4 ohm
> jacks...noise...switched cable...no noise...plugged in
> Precision bass...perfect. Low hum, no ambient noise
> or popping while playing. I cranked it and banged it
> and it was perfect. I plugged the Stingray in with
> the onboard eq turned all the way up and it did
> ok...but periodically there was the popping. Rolled
> way off the tone and that was much better, less hum,
> and no popping, but is that normal for active pups?
>
> Richard
>
>
>
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