Tube accelerator using 12AU7 tubing Equipped with an advanced audio engine ZFX-3. "96kHz sampling" for clear and good bass sound 21 types of base amplifier/stomp box modeling Creates the best bass sound for every situation. 6-band semi-parametric EQ for your professional needs 112 high definition effects with tuning for the base Built-in sound source & filtering, two different types of bass synth "Z pedal" for new dimension sound control Sound on sound for up to 5.4 seconds of phrase recording. Built-in chromatic tuner for multi-string bass sound range Stereo XLR output that acts as DI USB audio interface function.