Re: Swiss Army-Bass
This makes no sense at all to me. There is going to be noise in any passive setup (which I strongly disagree with), so among other things add a preamp? And you defer to those with more experience re: actives? You just told him to make it active!
There is going to be noise in any passive setup? Meaning every passive setup? No. I agree with you about the shielding, but a good passive humbucking pickup or set of pickups will not add noise. Most of my basses are passive and have no noise issues. As a matter of fact, the only basses I ever have noise issues with have preamps on them.
Maybe you forgot to add "single coil" in your post? That would make more sense to me.
Yes, you're right. I should have been more specific. Allow me to clarify: In the abstract,
everything has a noise floor. Even in an anechoic chamber, the sound of a heartbeat, and the blood rushing through ones' ears, could be heard.
Many of the popular bass pickups (Rickenbacker 4000 series, original Precision, split-coil Precision and Jazz, to name a few) are in fact single coil. The split-coil P is technically 2 single coils, wired in series. By themselves, they can be noisy at times -- subject to RFI (radio frequency interference), power line buzz (from florescent or neon lights, for example), microphonics due to loose winding, and so on. An off-the-shelf electric bass with factory passive SC pickups can be something of a coin flip in terms of sound or performance; that's one of the reasons why Seymour Duncan (the company) exists. Hotter pickup output increases the S/N ratio, of course. Shielding helps with the RFI, good grounding and braided signal wire wrap will reduce hum and buzz. Even after all that, however, there will be a
very slight hiss. This is no big deal on stage. The amp is usually noisier than that, the HVAC in the room will drown that out, and when the crowd shows up they don't care anyway, as long as they can hear you. However, a really anal retentive studio engineer (IMO, part of the job description) will noise gate you just on general principle, for that little tiny bit of hiss.
The humbucker was developed to combat single coil's inherent deficiencies, and it did so successfully. However, it's not the same sound as a single coil.
I don't dispute that you've got a good, quiet sound. I'm glad, because I had to jump through some hoops to get the sounds I needed from both my 5-string P and my Jazz. Pup swaps, braided wire wraps, copper foil lining the body cavities, upgrading the volume and tone pots, cap swaps on the tone controls... my experience with single coil setups has been arduous but worthwhile.
Again, you're right, so again let me apologize: a preamp by itself will only boost the signal, so garbage in, garbage out. If it's noisy to start with, it'll only be noisy and loud afterwards. It was my (mis-)understanding that active pickups were more for low-impedance matching.