Behringer's "Modded Out" take on the TB-303 rebuilds the legendary acid bass synth's circuitry from the ground up — matched transistors, authentic VCO/VCF/VCA design — while adding features the original never had, most notably a Devil Fish-inspired MIDI-controllable filter and a three-octave sub-oscillator. A 16-step sequencer and arpeggiator handle pattern programming without touching a computer.

An overdrive circuit replaces the original's simpler distortion for more sound-shaping range, and a 16-voice Poly Chain function lets multiple TD-3 units combine for genuine polyphony. It ships ready to play with no patching required, though a full CV/gate I/O panel is there for anyone who wants to go deeper.