Tube Preamps for Guitar and Bass

Introducing the Frog Tube Preamps. This hand built preamp, is inspired by the iconic 1970’s era Alembic F2b preamp based on the Fender Dual Showman preamp section from the late 60’s.

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  • Frog Tube Preamp Fx1 Studio

    $349.00

    Click on the preamp picture for more info!

    The Frog, guitar Tube Preamp Fx1, built by hand, is based on the 1st two stages of the Fender Dual Showman, using exactly the same tube preamp circuit as the iconic Alembic F2b Preamp. Its unique because it is pounds lighter and fits in a small pedal enclosure that can snuggle up with your other pedals on your pedalboard.  Make sure to read the shipping and special International order notes in the product description!

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  • Frog Tube Preamp Fx1 Ruggedized

    $399.00

    Click on the preamp picture for more info!

    The Frog, guitar Tube Preamp Fx1 Ruggedized, built by hand, is based on the 1st two stages of the Fender Dual Showman, using exactly the same tube preamp circuit as the iconic Alembic F2b Preamp. Its unique because it is pounds lighter and fits in a pedal enclosure that can snuggle up with your other pedals on your pedalboard.  Make sure to read the shipping and special International order notes in the product description!

    Special features of the Ruggedized version!:

    • True bypass stomp switch that removes the preamp circuitry from your pedal chain using the  Frog True Bypass Stomp switch circuit board.
    • Internally installed preamp vacuum tube with shield to provide more rugged protection of the glass preamp vacuum tube.  It can still be changed to any tube you want to use and we maintained the ability to switch the heater circuitry to 6 volt or 12 volt to support tons of preamp tubes.
    • Dual 1/4 inch output jacks for bi-amping (I love this feature when I hook output to two different pedal chains and two different amps, or, you can hook one to your amp and the other to the sound board
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