6.5" Bass Combo The HD15 Bass Combo packs Hartke's patented HyDrive speakers into a sleek combo design for small venues, rehearsal rooms, and bedroom practice sessions, and is capable of greatly enriching your low-end tone. The HD15 also maintains Hartke's commitment to producing quality bass amplification with exceptional durability. The HyDrive Design The HD15 (15 watt, 6.5" driver) features Hartke's patented HyDrive speaker technology, a meticulously crafted hybrid (half paper, half aluminum) cone bass speaker. Combining the warmth and roundness of paper with the punch and attack of aluminum, the HyDrive design produces a serious tone ideal for bassists of all genres and styles. Solid... With Style Packed with professional features, the HD15 combo is designed to be easy to use and reliable for players of all levels. The combo offers volume, bass, mid, and treble controls on its top-mounted amp panel for easy adjustments. It also features a 1/8" stereo auxiliary input for playing along with your favorite tunes on an MP3 player and a 1?4" headphone output for more intimate practice sessions. The HD15 also features a built-in limiter to keep the amp running at safe levels. Finally, its rugged enclosure is stylishly finished with a sleek, perforated metal grille and molded strap carry handle. With the exceptional tone of a HyDrive speaker in a durable, highly portable enclosure, the Hartke HD15 bass combo is capable of performing at levels far beyond ordinary bass combos. Features 15 watts of output power 6.5" HyDrive paper and aluminum cone driver Top-mounted amplifier with Volume, Bass, Mid and Treble controls 1?4" input for active and passive bass guitars 1/8" stereo Aux input for stereo line level devices (MP3 players, drum machines, keyboards, etc.) 1?4" headphone output Built-in limiter Perforated metal grille Molded strap carry handle Specifications Rated Output Power 15W (@1 kHz, 4 ohm, 1% THD) Rated Input Level -28dBV (@_1 kHz) Total Harmonic Distortion 0.13% (@ 1 dB below rated output, 1 kHz typical) Signal To Noise Ratio 57dB (1_Wrms @ 1 kHz) Signal Gain 46dB Bass Control 100 Hz Mid Control 400 Hz Treble Control 10 kHz Headphone Output 137mW/32 ohms (-10dBu,100Hz) Dimensions) 12.5? x 12.2? x 8? / 316 mm x 309 mm x 202 mm Weight 13.44lb / 6.1 kg