Here's the new boost from Matt Hoopes. Cornish buffer up front, so like the DRV, not a true bypass effect unless you want to wire it tha...

Cool JFET preamp circuit from Greer. Its supposed to sound like a Brownface-era Fender amp. I'd be curious what it sounds like without t...

Got a little simple boost/preamp for your Thursday. Should be a pretty easy fit in a 1590A. J113 alternatives would be J201, 2N5457, and pro...

Apparently it's tube week. Here's the Tube Driver made famous by David Gilmour. It uses a 12AX7 which is pushed by a dual opamp foll...

Came across John K's vero of this circuit with a few mods (Mid pot, bipolar charge pump) and figured we needed a layout for it as well. ...

Originally a bit of a flop from Boss, the FET Amplifier was made famous by U2's The Edge. It features a 2-band Baxendall tone stack and ...

This one just traced over on FSB . It's essentially a modified Wampler Plexidrive with an added bass control. Unless you're really s...

Apparently the guitar players were feeling left out with the all the old Music Man bass preamps, cuz I got a ton of requests for the Sabre I...

Lot of requests for this one after I posted the Stingray pre a few weeks ago, so here's the Sabre II. Pretty similar the the Stingray bu...

Gotten a lot of requests for this one and I finally bit the bullet and laid it out. It's the pedal version of the 3rd channel on Diezel...

Had several requests for on-board bass preamps and what better place to start than the original StingRay circuit? Simple 2 band-EQ with low ...

Stumbled across this schematic on FSB . It's a buffer/EQ/preamp for peizo pickups, specifically all Barcus-Berry electret microphone sys...

Here's a pretty simple but effective bass preamp from EWS. It's a 3-band EQ being pushed by a MOSFET gain stage. Looks like EWS made...

Here's a simple bass preamp circuit derived from the Sunn 200S using JFETs. It's pretty similar to the Bassman Preamp , but with the...

The Ashbory bass was first introduced in 1986 and is/was a half scale (18") fretless travel bass with a piezo pickup and built in pream...

Here's an older design from Catalinbread, but an interesting design as usual. It's a preamp/boost with a wide range of tone shaping ...

Here's a loud one for you (I am not responsible for any blown speakers that may happen as a result of you building this thing! haha)! It...

Got several requests for this one. Basically, it's small preamp to plug into a mobile device for use with apps like iRig. Pretty simple ...

If you're a Dead Head, you'll probably be interested in this one. It's the pre-amp from Jerry Garcia's Tiger guitar used fro...

The EchoPlex Preamp emulates the input stage on the old EchoPlex EP-3. It provides up to 11dB of gain and is mostly used as an always on ped...