Bass Head Power: 500W into 4Ω, 300W into 8Ω Dual JFET precursor Class D amplifier Variable compressor Controls for gain, bass, mid, treble and volume Mid-tone control: 5-position Ultra hi/lo boost Balanced direct out (XLR) Pre / post EQ option -40 dB pad Ground lift FX loop with adjustable mix, switchable per foot Audio in (for practice, e.g. with MP3 player)