Gallien-Krueger MB 500 500 Watt Bass Amplifier Head 500 Watts at 4 Ohms Built-in Limiter Four-band active EQ with variable contour 10 dB Pad XLR out, pre and post EQ & ground lift switch 500 Watts at 4 Ohms Built-in Limiter Four-band active EQ with variable contour XLR out, pre and post EQ 10 dB Pad, ground lift switch