A staple EQ. Used only for home recording and never taken outside. It's in beautiful condition with no scratches or paint chips. All accessories are included. The adjustable frequencies are: 31.25Hz (Ultra-low, resonance of guitar and cabinet) 62.5Hz (Ultra-low, the low end of bass) 125Hz (Low end of guitar, the "thump" when muting the strings) 250Hz (Low end of guitar, the pitch of the 5th and 6th strings) 500Hz (Low-mid of guitar, often boosted by jazz guitarists) 1kHz (Mid of guitar, often called "delicious mids") 2kHz (High-mid of guitar, the "jangly" sound) 4kHz (High end of guitar, makes it crisp when boosted) 8kHz (Presence of guitar, the "sparkle," but be careful not to overdo it) 16kHz (Ultra-high, the noise of the pick attack) The above knobs can be adjusted by ±12dB. The 18V operation and large headroom are also key features. A dedicated AC adapter is included. Type: Effects pedal Manufacturer: MXR Search terms) BOSS KLON CENTAUR Ibanez Fulltone Tone bender Fuzz Irei Neve