Aguilar Tone Hammer 500 Super Light 500 Watt Solid State Bass Amplifier Head with Drive Control, FX Loop and Balanced DI Output with Water Resistant Bag and Instrument Cable 500W @ 4 ohms, 250W @ 8 ohms Class D power amp Bass, Mid Level, Mid Frequency, Treble tone controls Adjustable Drive control adds subtle distortion and EQ Series effects loop adds 6dB of additional gain, perfect for a broad range of effects units