There is no pedal in the world not meant to bring us good tone. The Calvin Compressor features an OTA-based, transparent circuit and is a great start to your chain and is ultimately tweakable with five knobs and a voicing switch to attenuate treble frequencies, making it a great fit for electric, bass and acoustic guitars. 

Review by bonedo

Review by TDPRI

Manual

Demo by The Gear Dad

Demo by  Benten Distribution

Official Website

Calvin Compressor

Our confidence in DI does not make us lazy, and the Zurich Preamp features a simple but powerful setup. Volume, Bass, and Treble controls enable this preamp to tweak your tone to your liking while letting your acoustic guitar’s natural tone to come through. Use it on acoustic or bass, or even use it as an EQ’ed boost on electric guitar.

Demo by Benten Distribution

Official Product Video

Product Page

Zurich Preamp

Visit many good tones, but live in the versatile ambience of the Spurgeon Reverb V2. The Spurgeon Reverb V2 covers all sorts for ground - from classic spring to washy plate and hall tones - with the flick of a switch. Along with the traditional Mix, Tone, and Decay controls, the Spurgeon V2 features a Regen knob, which feeds the higher frequencies back into the circuit for subtle modulation to enormous oscillation.

Demo by  Sean Pierce Johnson

Review by delicious audio

Spurgeon V2

All who say preamps are invalid err and slander tone. The Zwingli SDD-3K Preamp takes the preamp from the Korg SDD-3000 delay and swaps the toggle switches for knobs for more flexibility. Use it as an always one to get that certain "Edge" in your tone (Make it meatier, if you will), or set the Zwingli as a solo boost.

Review by U2 Guitar Tutorials

Review by The Gear Page

Zwingli SDD-3K Preamp

This is our tone and that of our guitars. The Augsburg Deluxe Amp Sim is an all analog emulation of Fender Silverface and Blackface amps. It features a switchable cabinet simulator and XLR out, which makes it perfect as an analog option for running direct and an inexpensive option for running stereo. It also features a 1/4″ output dry through, so you can bypass the Augsburg at home, or run the XLR to the PA while you run the 1/4″ output to an amp.

Demo by Sean Pierce Johnson