8" Bass Combo The HD25 Bass Combo packs Hartke's patented HyDrive speaker technology into a sleek combo design that is ideal for small venues, rehearsal rooms, and bedroom practice sessions, and can greatly enhance your low end. The HD25 also maintains Hartke's commitment to producing high-quality bass amplification with exceptional durability. The HyDrive Design The HD25 (25-watt, 8-inch driver) features Hartke's patented HyDrive speaker technology, a carefully 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 HD25 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 HD25 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 HD25 bass combo is capable of performing at levels far beyond ordinary bass combos. Features 25 watts of output power 8" 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 25w Rated Input Level (@_1 kHz) 44.6mv rms Total Harmonic Distortion 0.09% Signal To Noise Ratio (1_Wrms @ 1 kHz) 1W/60dB, 25W/74dB Signal Gain -27dBV Bass Control 100 Hz Mid Control 400 Hz Treble Control 10 kHz Headphone Output 125mW/32 Ohms Dimensions 15.2? x 14? x 10? / 387mm x 355mm x 254mm Weight 24.7lb / 11.2kg