EVH 5150III 100S Head 100-watt Special Run Tube Head - Black Stealth "Power: 100W (tube) Tubes: eight 12AX7 (ECC83) - preamp; four 6L6 - power amp Three channels Controls: 3-band EQ, gain, volume, presence, resonance Impedance: 4, 8, 16 ohms (switchable) Direct output Two speaker outputs FX loop Adjustable bias control Black ""stealth"" look Four-button footswitch included Dimensions: 22"" x 12.5"" x 26"" Weight: 58 lb." Tubes: eight 12AX7 (ECC83) - preamp; four 6L6 - power amp Three channels "Controls: 3-band EQ, gain, volume, presence, resonance" "Impedance: 4, 8, 16 ohms (switchable)"