They’re both! The BASSRIG pedals are full-featured preamps which offer the full spectrum of vintage valve bass amp tones, but they can be used as drive pedals with a traditional amp too. The AMP OUT EQ allows the BASSRIG pedals to be used as an overdrive pedal with any amp, either to compliment or contrast your core tone. Alternatively, use the BASSRIG as an “always on” preamp, either with an amp or direct to the PA with the cabinet simulated DI OUT.