I want to get that geddy lee sound which is both bassy and trebly. I was thinking rather than running each pickup to a seperate amp, I was thinking running each pickup to its own preamp, most likely just a normal tone and volume pot for each. But the catch is to only have one output jack, do you think this is possible? Also, will my amp supply both sounds simultaneously?

If you e-mail John East he may be able to hook you up with somethig on this level. He is a TBer

This is definitely possible, but unless you do it on a circuit board (like East) it's a bit of a pain.

I have a Sonus 4 with two preamps (and two routes) and 3 pickups in it, and can switch between the two preamps with a single switch, all run to the same output. With a few modifications I could add a few switches to be able to switch on different preamps at different pickups (it's like 10 mins worth of changes). There's a lot more you can do with it, but I'm going to wait until I make a full board for it to save space and hassle.

The question is, though, what will you really gain by just running a volume/tone? That's just a passive circuit, so the only really difference you'll get is if you run two different values of capacitors on the tone control, and it won't make that big of a difference.

Contact Tim at Callowhill basses, he already produces a Maurice Fitzgerald signature bass with two pre-amps.

So you want a volume and a tone pot for each pickup? That has been done a thousand times over.

lowsound

You can get a schematic for a passive v-t-v-t from Rickenbacker's site.

maybe he meant having both pickups going out of one output, but still being able to have two separate preamps for each pickup? if this is the case, im guessing a stereo output jack would suffice.

The yamahaTRB series has 8. One on each pickup (for inpeadance matching), a combiner, bass boost, mid boost. treble boost, master out. There is even a spare in case you fit a piezo!

Pbassred, what are you talking about?

Sounds like maybe he's talking about the # of op amps on the circuit board.

Although I would have expected four dual or two quad op amps rather than eight singles, but it's possible.

well, it may not sounds right to you. i use stereo cable to carry the signal of the two pickups seperated and feed them to different pre.

Yes PJ i was counting the opamps and they are dual.

That said, A dual opamp is only 2 op amps in the same package, and a pre amp is essentially only an opamp. I have a honer with a single transistor "preamp". So, on that bassis, the TRB ALREADY has a preamp for each pickup. It then uses another op amp to combine them (later TRBs use a JFET I think). Having individual tone controls for each is just another step (and more knobs), but there is no reason why you couldn't.

Whether its of any benefit is a matter of preference.

This is easy. Get yourself a control plate assembly from a 62 Reissue

http://photos.imageevent.com/olivias/62rijazzbass/websize/62RI%20001.jpg

It's already got tone controls for each pickup. Then, swap out the jack for a stereo jack. Keep the Sleeve grounded, connect the pots of the neck pickup to the Tip of the jack, and the pots of the bridge pickup to the Ring. You'll need to run a stereo cable now, TRS, instead of TS. Then, at your rig, just put a small splitter box that takes the TRS on 1 side, and connects the Tip and Sleeve to the Tip and Sleeve of a mono jack, this'll be your neck pickup, and then connect the Ring and Sleeve to the Tip and Sleeve of a mono jack, this'll be your bridge pickup.

What you might consider beyond that is a small switch on the bass, that switches the bridge output between the Tip and the Ring. That way, you can have the stereo mode, or a mono mode, like a regular jazz, if you want.