Technology: Class D · Power at 4 ohms: 800 W · Connections: Speakon · Enclosure: Metal · Including: Bag · Country of Origin: Made in USA · The Mesa Boogie Subway D-800 is MESA's first ultra lightweight, professional Class D bass amp head. This amplifier provides an easy to use, very extensive preamp with comprehensive sound control, combined with an 800W amplifier. The tone control of the Mesa Boogie Subway D-800 is as follows: Bass Control: + - 12dB at 80Hz Low Mid Control: + - 12dB at 200Hz Hi Mid Control: + - 12dB at 480Hz Treble Control: + - 12dB at 2.5kHz The 'Voicing Control' is a kind of continuous voicing knob, so the sound can be continuously cross faded from vintage oriented towards modern to mid-heavy sound, scooped sound.