hartke 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. 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
