HPR151i - Speaker QSC - Free user manual and instructions
Find the device manual for free HPR151i QSC in PDF.
📄
Document temporarily unavailable
The manual is currently being transferred to our new server. It will be accessible again in a few hours. Thank you for your patience.
Pick your language and provide your email: we'll send you a specifically translated version.
| Product Type | Active subwoofer |
| Brand | QSC |
| Model | HPR151i |
| Frequency Response (-3 dB) | 51 Hz - 105 Hz |
| Frequency Range (-10 dB) | 43 Hz - 145 Hz |
| Maximum Peak SPL | 135 dB |
| Transducer | 381 mm (15 in) with 76 mm voice coil |
| Amplifier Power | 700 W |
| Input Sensitivity | 0.775 V (0 dBu) |
| Input Headroom | 10 V (22.2 dBu) |
| Input Impedance | 22 kΩ (balanced), 11 kΩ (unbalanced) |
| Input Connectors | 2 x XLR female (L and R) |
| Output Connectors | 4 x XLR male: 2 full range, 2 low-pass 100 Hz |
| Controls | Gain (21-position), polarity (normal/reverse), front indicator ON/OFF |
| Indicators | Power (blue), signal (green), limit (red) |
| Protection | Thermal, mute mode, power limiting, short circuit, RF, ultrasonic |
| Mains Power | 120 V or 230 V (depending on model) via locking IEC connector |
| Dimensions (H x W x D) | 651 mm x 559 mm x 525 mm |
| Weight | 44.5 kg |
| Finish | Black textured paint, perforated steel grille |
| Recommended Use | Floor or stage placement, 35 mm pole socket on top |
| Rear Clearance for Cooling | Minimum 152 mm |
| Maximum Ambient Temperature | 40 °C |
| Warranty | 3 years (USA), check dealer elsewhere |
Frequently Asked Questions - HPR151i QSC
What type is the QSC HPR151i?
The QSC HPR151i is a self-powered active subwoofer designed for professional applications.
How to install the HPR151i?
Place the HPR151i on the floor or stage, never on its side. A rear clearance of at least 152 mm is required for cooling. You can insert a 35 mm pole into the top socket to support a full-range speaker.
Can a pole be used with the HPR151i?
Yes, the HPR151i has a 35 mm pole socket. For top speakers, the pole must not exceed 660 mm (for HPR152i) or 787 mm (for HPR122i) to avoid tipping risk.
What do the indicators on the rear panel mean?
The blue POWER indicator shows power on. The green SIGNAL indicator lights when signal exceeds -25 dB. The red LIMIT indicator signals amplitude limiting (fast flashing) or mute mode (steady on) in case of overheating or fault.
How to adjust the polarity of the HPR151i?
Use the POLARITY switch (normal/reverse) to optimize low-frequency response. Start with NORMAL. If the subwoofer is far from full-range speakers, try REVERSE to improve phase coherence.
Which power cable to use?
Use the supplied V-LOCK cord (blue IEC connector with locking). If lost, a standard 18 AWG IEC cord works but without locking. Voltage must match the label (120 V or 230 V).
How to daisy-chain multiple speakers?
Use the FULL RANGE LINE OUT outputs to connect other speakers in parallel. You can daisy-chain up to 20 speakers without loss of quality. For subwoofers, use the 100 Hz LOW-CUT OUT outputs for full-range speakers if you want to filter lows.
What to do if the red LIMIT indicator stays on?
A steady red indicator indicates mute mode (thermal protection or fault). Let the unit cool for a few minutes. If the problem persists, check ventilation and environment (max ambient temperature 40 °C). If unchanged, contact QSC technical support.
How to clean the HPR151i?
Clean only with a dry cloth. Do not use liquid or abrasive cleaners. Ensure the unit is unplugged before cleaning.
What are the dimensions and weight of the HPR151i?
Dimensions: 651 mm (H) x 559 mm (W) x 525 mm (D). Weight: 44.5 kg. Transport with two people if possible.
User questions about HPR151i QSC
0 question about this device. Answer the ones you know or ask your own.
Ask a new question about this device
No questions yet. Be the first to ask one.
Download the instructions for your Speaker in PDF format for free! Find your manual HPR151i - QSC and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. HPR151i by QSC.