The TUBE ENGINE from MOOER is a 20 Watt, all-tube power amp. This Class A/B tube circuit utilizes hand-picked and matched sets of EL84 tubes to provide the perfect platform for use with your preamp pedals, amp modellers and effects units. TUBE ENGINE is fairly transparent, allowing the real tone of your other units to shine through. Whilst adding just enough warmth and color to make this a viable and different choice over the solid-state alternatives. TUBE ENGINE is housed in a light-weight metal chassis and comes complete with a carry handle and rack mounting lugs. Features: 20 Watts class A/B tube power amplifier. Supports Hi/Low gain input. 1 * 12AX7(ECC83), 1 * 12AT7(ECC81), 2 * EL84(6BQ5). Outputs for 1 * 16Ω, 1 * 8Ω or 2 * 16Ω. Supplied with carry handle and rack mounting lugs. Specifications Power Output: 20 Watts Preamp Tube: 12AT7（ECC81）* 1,12AX7（ECC83）* 1 Power Tube: El84（6BQ5）* 2 Power Requirements：100~120V 50/60Hz or 220~240V 50/60Hz Item Size: 30 * 18 * 10cm/ 11.8 * 7.1 * 3.9in Item Weight: 5182g/ 11.4lbs Package Size: 40 * 24 * 14.5cm/ 15.7 * 9.4 * 5.7in Package Weight: 5910g/ 13lbs Package List: 1 * Power Amplifier 1 * AC Power Cord 1 * Users Manual(English)