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PREAMPS: Okay, but will a preamp help with feedback problems?
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So, you read the "Do I Need a Preamp?" FAQ - but you have lots of feedback problems; will a preamp help with reducing feedback?

Okay, so this answer assumes that you've read the other FAQ, linked above. If you haven't read that one, please do. That said, the straight answer to this question is that it may help, but it's really hard to say for sure.

It can depend on your pickup; a pickup mounted/clamped/glued to the surface of the bridge (like a Fishman BP100, K&K Double Big Twin, etc.) puts out less sound than one that is under pressure; this means you need to have more "makeup" gain to bring it up to performance volume levels. This added gain can increase the likelihood of feedback, since raising the incoming signal also increases noise and makes the pickup more "sensitive." As a result, it may be more likely to feed back, since that increased sensitivity is more likely to also pick up unwanted sounds, like the output from speakers and amps onstage.

Also, like we mention in that other FAQ (you DID read it, didn't you?) piezo-electric pickups are commonly known for having a "quacky" response when a buffering preamp isn't used. Most players prefer at least 1 megohm (5-10 can be better, depending on the pickup used) to make such a pickup sound good. Not having that impedance buffer can create some weird peaks and valleys in the tonal response of the pickup, which you end up trying to fix with all sorts of crazy EQ correction.

"Correction" is the key word, here - it signifies the difference between radically altering the EQ controls to just make the pickup sound "decent," rather than "enhancement," which is just making subtle tweaks to improve an already reasonably good sound. Doing this sort of extensive correction can also open up avenues for feedback; by over-compensating with EQ at certain frequencies to get a decent tone, you may also be unintentionally boosting particularly "touchy" or "hot" frequencies for feedback as well.

So a preamp that increases gain and properly buffers the signal may allow you to run a lower input gain, and flatten the EQs a bit, both of which may help reduce feedback.

But there's not really a guarantee, since there are so many other variables and causes for feedback.

If you've bought a pickup or preamp from us, we included a bright pink sheet of tips, which has about a page's worth of tips for reducing feedback and getting better sound. Don't have that? Email me and I'll reply with some additional feedback-fighting tips!






The Fine Print:

The information contained herein is based on what's in my brain — and/or my observations and opinions from my personal experiences (and those of Bob, before me) — as of this moment today, and is subject to change. I'm sure that a great deal more information and detail could be added — but the intent of these writings is to present easily understood, quick FAQs, to address common questions and improve the reader's general knowledge.

What's written here is by no means any kind of authoritative absolute answer, for I am not the world's greatest authority on bass (not even close), or on much of anything else, for that matter. So, by all means, get a second opinion, and know that all the information provided here is for general informational purposes only. I am not providing professional advice; be aware that, where applicable, any information acted upon is at your own risk.

I simply and sincerely hope the information and opinions here are helpful to you on your quest for knowledge about the bass and related subjects... that's the point!

I welcome email with dissenting and additional viewpoints/information/updates that help improve my personal awareness and these content pages. If you have a question that you think belongs here, please let me know.
Mark

PS: It should go without saying that all of the information here, unless otherwise attributed, was expressly created by us for the benefit of our customers. All graphics, text, data, and other information is copyrighted © 1995-current. You are not permitted to re-use any text, information, or graphical elements on your own website; you may post links to it, or small excerpts, on message boards if properly attributed and linked back to our pages.