This is an all-analog parametric equalizer effector with an independent EQ section from the distortion effector "PTPRE" released in 2023. It has been refined by adding a "Q control" section that allows you to adjust the width of the frequency band to be boosted or cut, and by expanding the headroom, it can also be used with electric bass and keyboards. This one unit allows you to freely adjust the sound. 5-Band Parametric EQ Equipped with a 5-band parametric equalizer. Use the knob to select any frequency from each of the five bands, and use the slider to boost/cut by ±10dB. You can fine-tune the sound to suit any situation. ○Q controls Each equalizer band adjusts the frequency bandwidth to boost or cut. Centered around the selected frequency, turning the Q knob fully counterclockwise will give you the widest bandwidth, while turning it fully clockwise will give you the narrowest bandwidth. Master LEVEL control Adjusts the overall volume. Maximum boost is approximately +6dB. ○Wide headroom generated by ±9V power supply circuit. The internal boost circuit expands headroom, allowing it to be used with electric basses and keyboards.- Control 5-band frequencies, 5-band levels, 5-band Q controls, Master Level - Other True bypass - I/O's INPUT, OUTPUT - Dimension 100mmW x 123mmD x 63mmH -Weight 690g (Including Battery) - Required Current 125mA @9V - Power Supply One 9 volt battery (006P) or External DC 9 volt AC adapter (*) *Please purchase a 9V/center negative AC adapter separately. - Individual pack 119mmW x 154mmD x 66mmH / approx. 755g