Hartke LH1000 Bass Guitar Amplifier Head Dual Parallel Mode: 2 x 225 watts @ 8 ohms, 2 x 320 watts @ 4 ohms, 2 x 545 watts @ 2 ohms, Bridge Mode: 1 x 750 watts @ 8 ohms, 1 x 1100 watts @ 4 ohms Bass and Treble Shelving, plus mid-peak EQ controls, Selectable brite switch for added high frequency response, Selectable limiter switch with LED indicator Classic 12AX7 High Voltage Class-A tube preamp circuit, Balance control blends level of A and B outputs Front panel XLR balanced direct output, Rear panel 1/4-Inch effects loop 1/4-Inch plus Speakon output connectors, Two-rackspace metal chassis with steel faceplate and handles