The Acti-Boost – Type A and Type R are two versions of a boost/tone shaper pedal that are based on the AC Boost / RC Boost. They both use the same PCB but can only be used one at a time.Both versions feature Baxandall active EQ circuitry, which helps to maintain a clean and crisp tone. They offer +/- 15db of boost on bass and treble frequencies and can provide up to 20dB of boost.The main difference between the two versions is the character of the boost. Type A offers a bit of grit and can push into overdrive at higher settings. Type R, on the other hand, remains clean throughout most of the range but starts to introduce some dirt at the top end.Additionally, you have the option to choose more bass-friendly capacitors, which will affect the frequency filtering at the input and adjust the EQ control frequencies. While these pedals are not specifically designed for bass, they can still be used effectively on a 4 or 5-string bass guitar.

Summary created by AI from the original source.