From the Mesa/Boogie Website:
The GRID SLAMMER™ overdrive pedal produces a variable boost in gain over a wide range with a classic, guitar-centric midrange bump that enhances many different playing styles. It’s a true overdrive “specialist” that covers an amazing array of what many top players consider the most expressive and musical ranges of overdrive. From sweet, subtle breakup to a harmonically smoldering overdrive that can both sting and sing, the GRID SLAMMER sets a new bar in legendary overdrive!
Designed and Handcrafted in Petaluma, California, USA True Bypass On/Off Switching - Bypasses all circuitry when off to ensure no tonal loss Gain Control allows you to dial in the perfect amount of vintage breakup or classic overdrive Master Level Control provides a variable range of signal boost up to +20dB Tone Control balances the amount of high frequencies On/Off Status LED 9V Battery Powered or Externally Powered (optional) via External Power Jack Input Input & Output Jacks (Nominal Input -20dB) Dimensions (W/D/H): 2.87" x 4.77" x 2.28" (73mm x 122mm x 58mm) Weight: 0.731 lbs. (332g) with battery, 0.631 lbs. (287g) without battery True Bypass Switching Battery Type: 9VDC (one) Input Impedance: 1M Ohm (500k Ohm minimum) Output Impedance: 10k Ohm
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