bass tube preamp pedal 12AU7 Preamp

bass tube preamp pedal 12AU7 PreampThe 12AU7 PREAMP is specifically designed for acoustic guitars, especially those with piezo pickups, with the goal of making the signal sound like an actual guitar. Let the audience hear what you hear! No more phony brightness, but rather a much more natural presentation with enough tone control range to dial in your desired sound. A JFET input stage offers up very high input impedance for improved bottom end when connected to piezo directly. The XLR

The 12AU7 PREAMP is specifically designed for acoustic guitars, especially those with piezo pickups, with the goal of making the signal sound like an actual guitar. Let the audience hear what you hear! No more phony brightness, but rather a much more natural presentation with enough tone control range to dial in your desired sound.

A JFET input stage offers up very high input impedance for improved bottom end when connected to piezo directly. The XLR output (for PA) is galvanically isolated to minimize hum and buzz while on stage (ground lift button on side). Let vacuum tube magic warm up your sound! This always-on pedal works great for synth and bass too.

I was inspired to design this pedal to help local artists (Kimokeo, Peterson, Na Leo, Kapono) achieve a more life-like sound in concert.

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Specifications

• 1 x 12AU7, all analog circuit
• 5MOhm input impedance
• 15dB maximum gain
• 2.5% distortion @500mV
• 50Hz to 20kHz bandwidth
• 9V @140mA (center negative)
• 4.7" x 3.7" x 2.1"

Downloads

• User Manual

Videos

Testimonials

• "This thing sounds great, I can really hear that tube!"
• "Hey Jim, I am loving my acoustic tube preamp pedal I bought from you. One of the first times I used it live, another Guitar player came right up to me afterwards and said: 'What is going on with your acoustic guitar, it sounds so natural.' So I told him all about your preamp."
• "Your stuff is killing. I think you could market the PREAMP to bassists as well as guitarists. It sounds fantastic on ebass and upright bass. I can see acoustic and jazz bassists loving, and like I said, it gave me the best slap bass (marcus miller, larry graham) tone I've ever heard. I just don't get paid to slap. :)"
• "The tone was exactly the same as my J45 sound when played acoustically. The levels per frequency was even and gave a much warmer and fuller sound through the sound system. Very easy to make adjustments but very minimally needed because the 12 ʻoclock setting suggestions seemed to be spot on...just with some minor adjustments."