The PQ-50 has 4 bands labelled Low, Low-Mid, High-Mid and High. Each band can be adjusted as much as +/- 20dB over a bandwidth ranging from 20Hz to 20KHz. For the high and Low bands there are two EQ curves available. Peaking EQ is for accurate boost or cut at a specific frequency range. Shelving EQ is for overall tonal contouring. Harmonic distortion is down at 0.03% while the residual noise level is down at -97dBm. Through a switch at the back the input signal can be switched between -10dBm (instruments) or +4dBm (line level).
About The Author
Florence Munoz founded BossArea.com in 2003 and has written extensively about guitar pedals. Boss Area lists over 150 different pedals of all types produced since 1977. The listings are now on GuitarLessons.org.