Output Connections

Full-range models have one XLR output connector marked FULL RANGE LINE OUT. The output connector is wired in parallel with the input enabling connection of multiple enclosures in a “daisy-chain” fashion.

Subwoofer models have two sets of output connectors, one set for the left and one set for the right audio chan- nel. Each channel has a FULL RANGE LINE OUT connector and a 100 Hz LOW-CUT OUT connector (active 100 Hertz filter applied, non-defeatable).

We recommend balanced connections be used. Balanced connections will reduce AC hum and interference, espe- cially with long cable runs. Unbalanced connections may be suitable for short cables.

HPR122i, HPR152i and HPR153i

Insert the XLR connector into the jack marked FULL RANGE LINE OUT. Connect the other end of the cable to the next down-stream audio device’s input connector. The output connector is wired in parallel with the input con- nector and is not effected by the 100 Hertz low-cut filter switch setting.

HPR151i and HPR181i

FULL RANGE LINE OUT: Use the outputs marked FULL RANGE LINE OUT (Left and/or Right) when connecting to down-stream powered loudspeakers which accept full- range audio or have their own filtering.

100 Hz LOW-CUT:Use the outputs marked 100 Hz LOW- CUT OUT (L and/or R) when connecting to downstream powered loudspeakers that have no low-frequency filter- ing but the low-frequency roll-off is desired. Do not use the 100 Hz LOW-CUT OUT connectors for connecting to other subwoofers. Instead, use the FULL RANGE LINE OUT. Be sure to turn off any loudspeaker connected to the 100 Hz LOW-CUT OUT before turning off the subwoofer’s AC power. This prevents any undesired turn-off transients (thumps, bumps) in the connected devices.

If using the subwoofer’s 100 Hz LOW-CUT OUT connector to provide signal to the top-boxes (HPR152i and HPR153i), be sure the top-box’s low- cut filters are OFF. Do not apply a second filter as the sonic performance of the system will be nota- bly degraded.

IMPORTANT! If using full range loudspeakers from another manufacturer, we recommend they be connected to the QSC subwoofer’s 100 Hz LOW- CUT OUT. This will ensure proper phasing of the full range loudspeaker with respect to the sub- woofer.

Full-range loudspeaker’s Input (IN) and Output (OUT) Connectors

Subwoofer loudspeaker’s Input (IN) and Output (OUT) Connectors

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QSC Audio HPR122i, HPR152i, HPR153i, HPR151i, HPR181i user manual Output Connections, HPR122i, HPR152i and HPR153i
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HPR122i, HPR152i, HPR153i, HPR151i, HPR181i specifications

QSC Audio is renowned for delivering high-quality audio solutions, and their HPR series is a testament to this commitment. The HPR122i, HPR152i, HPR153i, HPR151i, and HPR181i are standout models in the lineup, catering to a variety of sound reinforcement needs.

Starting with the HPR122i, this model is a 12-inch two-way loudspeaker designed for portable applications. It features a built-in 1000-watt Class D power amplifier, delivering exceptional clarity and high output. The rugged birch plywood enclosure enhances durability, while the advanced waveguide technology ensures a wide dispersion pattern, making it ideal for both live sound and permanent installations.

Moving up, the HPR152i showcases a larger 15-inch woofer, perfect for larger venues where deep bass and punchy sound are required. It retains the same robust build quality and integrated amplification as its smaller counterpart, ensuring reliability during extended use. The HPR152i’s contoured design allows for versatile positioning, whether it's on stands or as a floor monitor.

The HPR153i takes it a step further, offering a three-way design for even greater fidelity. With a dedicated 15-inch woofer, a 6.5-inch midrange, and a 1-inch compression driver, the HPR153i delivers a rich and detailed sound across all frequencies. This model is especially favored in settings where clarity and precision are paramount, such as concert halls and theatres.

Not to be overlooked, the HPR151i is a powerful subwoofer that complements the full-range speakers in the HPR series. Its 15-inch driver, paired with a 1000-watt Class D amplifier, delivers deep, impactful bass, enhancing the overall sonic experience. The HPR151i is ideal for situations requiring enhanced low-frequency response, making it a great match for DJs and live performers.

Finally, the HPR181i subwoofer elevates the low-end even further with its 18-inch woofer. This model is designed for serious bass enthusiasts, providing thunderous lows that can fill large spaces. Its robust design and advanced thermal management allow for extended use without overheating.

All models in the HPR series incorporate QSC’s Digital Signal Processing (DSP) technology, ensuring optimal sound performance and system protection. With their rugged construction, advanced features, and powerful sound, the QSC HPR series stands out as a top choice for audio professionals seeking reliability and exceptional performance in live sound applications. Whether for music, speech, or multimedia, the HPR series effectively meets the demands of diverse sound environments.
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