MXR Bass Compressor

The MXR Bass Compressor by Dunlop features a range of technical specifications and functionalities. It offers recording-quality compression with Constant Headroom Technology™ and true bypass switching for maintaining a tight and clean low end. The 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).

Technical Specifications:
- Input Impedance: 1 MΩ
- Output Impedance: 600 Ω
- Max Input Level: +14 dBV
- Max Output Level: +8.5 dBV
- Frequency Response: ±1 dB, 20 Hz to 20 kHz
- Noise Floor: -90 dBV
- THD: > 0.5%
- Gain: 31 dB
- Compression Ratio: 4:1, 8:1, 12:1, 20:1
- Attack Time: 20 µs to 800 µs
- Release Time: 50 ms to 1.1 s
- Bypass: True Hardwire
- Current Draw: LEDs OFF 14 mA, LEDs ON 19 mA
- Power Supply: 9 volts DC

The controls include:
- METER display showing gain reduction level and compressor response time
- RELEASE knob for controlling the speed at which the signal returns to its uncompressed gain level
- ATTACK knob for controlling the reaction time of compression
- OUTPUT knob for controlling the overall effect volume
- RATIO knob for setting the degree of compression, from mild 4 (4:1) to extreme 20 (20:1)
- INPUT knob for controlling the gain level of the input signal
- FOOTSWITCH for toggling the effect on/bypass (blue LED indicates on)

The MXR Bass Compressor is designed in a durable, lightweight aluminum housing, similar in size to a Phase 90 pedal.