Manuals / QSC Audio / Home Audio / Stereo System

QSC Audio HPR122i, HPR152i, HPR153i, HPR151i, HPR181i Output Connections, HPR151i and HPR181i

Models: HPR122i, HPR152i, HPR153i, HPR151i, HPR181i

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Output Connections

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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FAQ

What type of connections are recommended for QSC Audio stereo systems?

We recommend using balanced connections to reduce AC hum and interference, especially with long cable runs. Unbalanced connections may be suitable for short cables.

Can I use the 100 Hz LOW-CUT OUT connectors for connecting to other subwoofers?

No, instead use the FULL RANGE LINE OUT. The 100 Hz LOW-CUT OUT connectors are intended for downstream powered loudspeakers that have no low-frequency filtering but require the low-frequency roll-off.

How should full-range loudspeakers from another manufacturer be connected to QSC subwoofers?

We recommend they be connected to the QSC subwoofers 100 Hz LOW-CUT OUT to ensure proper phasing of the full range loudspeaker with respect to the subwoofer.