User Manual

CONNECTIONS & POWER
INPUT Jack – This ¼” jack is the audio input to the Nano Metal Muff. The input
impedance presented at the INPUT jack is 1MΩ.
OUTPUT Jack – This ¼” jack is the audio output from the Nano Metal Muff. In
Bypass mode, the OUTPUT jack is connected to the INPUT jack through a buffer
circuit. The output impedance at the OUTPUT Jack is 600Ω.
9V Power Jack – An optional 9VDC, center-negative power supply can be inserted
into this jack to power the Nano Metal Muff. The Nano Metal Muff requires 24mA at
9VDC on a center-negative plug. Do not exceed 12V at the power jack.
When using a 9V battery, plugging into the INPUT jack activates power. The input
cable should be removed when the unit is not in use to avoid running down the
battery.
To change the 9-volt battery, you must remove the 4 screws on the
bottom of the Nano Metal Muff. Once the screws are removed, you can
take off the bottom plate and change the battery. Please do not touch the
circuit board while the bottom plate is off or you may damage a
component.
NOTES & SPECIFICATIONS
• Audio input impedance at INPUT jack: 1MΩ
• Audio output impedance at OUTPUT jack: 600Ω
• Current draw: 24mA
• Maximum input signal level in bypass, before clipping: +8.5dBu
To achieve its biting distortion, the Nano Metal Muff has very high maximum gain.
This requires that both the pickups and cables be well shielded and properly
grounded to avoid excessive hum when high sustain control settings are used.