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LEVEL is the master output level and it controls the amount of signal provided to the host amplifier. GAIN determines the amount of gain (overdrive) in the signal path. BASS works in tandem with the TREBLE control to adjust low frequencies. MID increases or decreases the amount of midrange frequencies. TREBLE adjusts the amount of high frequencies present in the mix and – unlike devices with just a TONE control - allows you to fine tune the high frequencies separately from the low frequencies.


True Bypass On/Off Switching - Bypasses all circuitry when off to ensure no tonal loss,

LED Indicators

On/Off Status LED

Power Requirements

9V Battery Powered or optional AC Powered via External Power Jack Input. WARNING!!! To avoid immediate damage and voiding the warranty, the External Power Supply MUST be 9VDC with a NEGATIVE CENTER plug polarity and a jack plug size of 2.1mm x 5.5mm.

Current Draw


Input Output Jacks

Input & Output Jacks (Nominal Input -20 db)

Input Impedance

1M Ohm (500k Ohm minimum)

Output Impedance

10k Ohm

Switching Type

True Bypass


4.77 x 2.87 x 2.29



Disclaimer: In order to continually improve the design, quality and performance of our products and to use the best materials at all times, MESA/Boogie reserves the right to substitute or change specifications (including parts or coatings) without notice.



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