MXR® MICRO AMPThe Micro Amp allows you to boost your signal with a preset amount of gain up to +26dB. This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included). Adding a preset amount of gain with just a single control, the Micro Amp is a great way to boost your signal for lead work or adjust between two different guitars with unmatched output (i.e. humbuckers to single-coils). It can also provide a permanent boost in a long effects chain where signal drop off is a problem. SPECIFICATIONS Input Impedance 1 MΩ Output Impedance 470 Ω Maximum Output Level +6 dBV Noise Floor* -80 dBV Gain Control +0.5 dB to +26 dB Freq. Response 20 Hz to 20 kHz, +0 dB, -1.4 dB Bypass Hardwire Current Draw 2.5 mA Power Supply 9 volts DC