Why choose QSC's HPR Series?
There's a QSC amplifier inside each HPR Now you can get the legendary performance and reliability of QSC's rack mount amplifiers built into a powered loudspeaker. The power module is designed with the same top-quality components and rigorous standards you expect from any QSC amplifier. QSC is regarded as one of the leading amplifier manufacturers in the world. We have over 35 years experience making professional-grade amplifiers. When you buy an HPR Series powered loudspeaker, you know it is backed by the QSC quality and reliability you've come to expect. 
Discrete component designs
Many powered speaker amplifier modules use low-cost, consumer-grade "chip amps" to decrease costs and simplify design. The HPR Series features a professional, discrete component design, hardened to withstand abuse and engineered to deliver the best possible performance even when pushed to the limit. Signal Processing An advantage of powered speakers is that the design engineers know everything about the system. This means that all the signal processing - crossover frequencies and slopes, EQ transfer functions, phase corrections and limiting - can be precisely tailored. Multi-Band Limiting Nothing kills speaker drivers faster than clipping, which happens when an amplifier is driven too hard. At best, this clipping will be annoying to listeners. At worst it may burn up the speaker voice-coils. The HPR series protects itself (and your performance) through the use of active Multi-Band Limiting that detects excess level at each amplifier channel before clipping occurs. Then dynamic peak limiting is applied to the overall signal. The limiting parameters have been carefully set to maintain overall frequency balance and minimize audible "pumping". You will probably need to watch the rear panel LIMIT LED to even know that limiting is taking place. The result - your HPR system delivers clean, undistorted sound even when you push it hard. For high-level dance music or reinforcement of bass instruments and kick drum, an HPR series subwoofer will add low-frequency extension and power to any sound system. When the requirement is for compact size and tight, punchy low-end, the single 15” HPR151i subwoofer is the answer. The 700 watt power module is capable of producing 133 dB peak SPL with frequency response down to 43 Hz and sound quality that rivals many 18” subwoofers. A top-mounted 35mm pole socket is provided for use in sub/satellite systems.
• Power module based on the best-selling RMX series amplifier technology provides 700 watts of class H power
• Attractive and professional appearance
• Rugged birch enclosure
• Tour-grade 16 gauge steel grille
• Ergonomic handles with comfortable, non-slip grip
• 35 mm pole socket
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