Serious Tone. The all-new HD15 Bass Combo packs Hartke’s patented HyDrive speakers into a sleek combo design for small venues, rehearsal spaces and bedroom practice sessions, and capable of greatly enriching your low-end tone. The HD15 also maintains Hartke’s commitment to producing high-quality bass amplification with exceptional durability. The HyDrive Design The HD15 (15 watts, 6.5″ driver) employs Hartke’s patented HyDrive Speaker Technology that offers a carefully crafted hybrid (half paper, half aluminum) cone bass speaker. By combining the warmth and roundness of paper with the punch and attack of aluminum, the HyDrive design produces serious tone that is ideal for bass players of all genres and styles
