Psycho Knob Board - Internal Distortion/Boost/Overdrive for Guitar or Amp - now with pre-wired leads! - C. B. Gitty Crafter Supply
Onboard Preamp- Clapton Mid Boost, Brian May Treble Boost, C
Dual Boost" two switch Onboard Mid Boost/Frequency Expander
Amazon.com: Kmise Under Saddle Piezo Pickup Onboard Preamp System for Acoustic Guitar : Musical Instruments
Dual Boost" two switch Onboard Mid Boost/Frequency Expander
Micro Booster MK4 Onboard Guitar Preamp with Push-Push Switch-Pot – BECOSFX
Fender Pre-Amp Mid Boost Kit 25 DB | Musician's Friend
BECOS FX Micro Booster MK4 Onboard Guitar Preamp with Push-Push Switch-Pot, 250K (for Single Coil) | guitar pedals for any genre
Fun with Onboard Boosters! - tonefiend.com
Artec QTB, 4 Step Clean Boost On Board Circuit for Electric
BECOS Micro Boost-EQ Onboard Guitar Preamp with Tilt-EQ, Variable Gain, Push-Push True-Bypass - 250K | Reverb
Demeter MID Boost/Fat Control Onboard Guitar Device
Onboard Preamp- Clapton Mid Boost, Brian May Treble Boost, C
Active Onboard Guitar Preamp - EQ-Boost External Potentiometer - AnalogWorkshop | eBay
GFS Onboard Guitar Enhancer Preamp Booster, DOD 250 | Reverb
Aguilar Onboard Preamp 2-band Boost/Cut – Chicago Music Exchange
Fun with Onboard Boosters! - tonefiend.com
Tiny Active Onboard JFET Guitar Preamp 6dB Linear Gain Booster | eBay
Aguilar OBP-3SK/PP Onboard Active Bass Guitar Preamp Kit
Simple OnBoard JFet Preamp for Piezos - Cigar Box Nation
Active Onboard Guitar Preamp - EQ-Boost external potentiometer - AnalogWorkshop | eBay
Seymour Duncan Active Bass™ Preamp 3 Band for Active Pickup | Seymour Duncan
How To Make a DIY Onboard Bass Guitar Preamp (Project Berocca Part 10) - YouTube
East UK Uni-Pre Onboard Preamp | Bass Gear Magazine
