HD508

4 x 8" Bass Combo

Packing four 8" Hartke patented HyDrive speakers and a 500-watt Class D amplifier into a sleek cabinet that weighs only 49 pounds, the HD508 brings exceptional bass tone to any rehearsal, stage, or studio.

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The HyDrive Design

HyDrive speakers feature carefully crafted paper/aluminum hybrid cone drivers. The hybrid makeup delivers an exceptional blend of warmth and attack that can't be attained by traditional all-paper bass speakers. And specific to the HD508, packing four 8" HyDrive speakers into a single cabinet creates a combined cone area that is larger, as well as able to reproduce a wider audio range, than that of a single 15" speaker.
Power and Portability

In addition to the impeccable sound of the HyDrive speakers, the HD508 offers tremendous power in a highly portable design. Its lightweight Class D amplifier produces an earth-shattering 500 watts of power capable of filling any rehearsal room, recording studio or performance venue. And with a total weight of only 49 pounds, the HD508 is easy to transport with its molded strap handle, metal side handles, or removable casters.
Shape Your Tone

The HD508 includes a selectable Shape circuit that allows you to dial in a specialized EQ curve designed to improve tone by selectively boosting and cutting across the frequency range. In addition, a 3-band EQ provides further customization options.

Features

Lightweight Class D combo amplifier that weighs 49lb
500 watts of power
Four 8" HyDrive paper/aluminum hybrid cone drivers
Top-mounted control panel
Hartke's Shape EQ knob with variable filter
3-band (Bass, Mid, Treble) EQ
XLR direct output
1/8" stereo Aux input
1⁄4" headphone output
1⁄4" bass input
Effects loop
Perforated steel grille
Molded strap carry handle
Two metal side carry handles
Four removable casters included

Specifications

Rated Output Power	500 watts Peak / 250 watts RMS
Rated Input Level	77.46mv rms (@1kHz)
Total Harmonic Distortion	0.54% (@1dB below rated output, 1kHz typical)
Signal To Noise Ratio	1W/49.3dBu (1Wrms @1kHz)
Signal Gain Speaker Output	37.1Vrms
Signal Gain to Direct Out	4.2Vrms
Bass Control	70Hz
Midrange Control	700Hz
Treble Control	5kHz
Shape Control	100Hz - 900Hz
Dimensions	20″ x 12″ x 22″ / 506mm x 305mm x 560mm
Weight	49lb / 22.2kg