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12" Bass Combo

The HD75 Bass Combo packs Hartke's patented HyDrive speaker technology into a sleek combo design that greatly enhances your low-end tone and has enough power to handle any rehearsal room or small venue. The HD75 also maintains Hartke's commitment to producing quality bass amplification with exceptional durability.

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  • The HyDrive Design

    The HD75 (75 watt, 12" driver, 1" tweeter) features Hartke's patented HyDrive speaker technology, which offers 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.

  • HD75_Top

    Solid... With Style

    Packed with professional features, the HD75 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, as well as a 7-band graphic EQ for easy tweaking. It features a full effects loop, as well as a 1/8" stereo auxiliary input for playing along with your favorite tunes via an MP3 player, and a 1⁄4" headphone output for more intimate practice sessions. In addition, the HD75 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 sound of HyDrive speakers in a durable, highly portable enclosure, the Hartke HD75 bass combo is able to perform at levels far beyond ordinary bass combos.

Features / Specs


  • 75 watts of output power
  • 12” HyDrive paper and aluminum cone driver
  • 1” tweeter
  • Top-mounted amplifier with Volume, Bass, Mid and Treble controls
  • 7-band graphic EQ
  • 1⁄4” input for active and passive bass guitars
  • 1/8” stereo Aux input for stereo line level devices (MP3 players, drum machines, etc.)
  • 1⁄4” headphone output
  • Built-in limiter
  • Effects loop
  • Perforated metal grille
  • Molded strap carry handle


Rated Output Power 75w
Rated Input Level (@ 1 kHz) 44.6mv rms
HD150 38.8mv rms
Total Harmonic Distortion (@ 1 dB below rated output, 1 kHz typical) 0.32%
Signal To Noise Ratio 1W/62dB
Signal Gain Speaker Output 35V
Signal Gain to Send Jack 545mV
Bass Control 50 Hz
Mid Control 700 Hz
Treble Control 10 kHz
Seven-Band Graphic EQ Frequencies 63Hz, 125Hz, 250Hz, 500Hz, 1.25kHz, 2.5kHz, 5kHz
Dimensions 19.9” x 18.6” x 13.9” / 506mm x 472mm x 353mm
Weight 48.2lb / 24.7kg

Warning CALIFORNIA PROPOSITION 65 WARNING: Cancer and Reproductive Harm -

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