Product Detail 500 watts of power Classic 12AX7 High Voltage Class-A tube preamp circuit Bass and Treble Shelving, plus mid-peak EQ controls Selectable brite switch for added high frequency response Selectable limiter switch with LED indicator . The "Hartke LH500 Bass Guitar Amplifier Head" is best product for you. We recommended Hartke LH500 Bass Guitar Amplifier Head