Specifications, Subwoofer Models

	HPR151W	HPR181W
Frequency Response, ±6dB	47-110 Hz	42-110 Hz
Frequency Range, -10dB limit	43-140 Hz	39-140 Hz
Maximum Peak SPL	133dB	134dB
Nominal coverage, H x V	Not applicable (N/A)	Not applicable (N/A)
Directivity Index	0	0
Directivity Factor	1	1
Transducer Description	15” (381mm) transducer with 3” (76mm) voice coil	18” (457mm) transducer with 4” (102mm) voice coil

Amp Power

700 Watts

Input Sensitivity

0.775 Vrms (+0dBu)

Input Headroom/Clipping

10 Vrms (+22.2dBu)

Input Connectors/Impedance

Two XLR female, 22k Ohm, balanced, left and right (L+R) inputs (11k Ohms unbalanced)

Output Connectors

Four XLR male: two wired in parallel with Input connector (full range), two post-100 Hz low-cut filters

Controls, Indicators, and

Gain control, Phase switch (normal/reverse), Front LED on/off switch, Limit/Clip (red LED), Signal presence (green LED), AC Power (blue LED)

Adjustments

AC Power switch, AC circuit breaker

Protection, Agency certs.

Thermal limiting, On/Off muting, power limiting, DC protection, short circuit protection, ultrasonic protection, RF protection, UL/CE listed

AC Power Requirements

AC Power Connector and Cordset	Factory supplied IEC cordset: 6’ (2m) #18AWG 120V North American or European 230V cordset
Dimensions	25” (635mm) x 22” (559mm) x 21” (525mm)	28” (711mm) x 24” (595mm) x 23” (582mm)
Weight	98 lb/44.5 kg	127 lb/57.6 kg
Finish and Grill	Wear-resistant textured paint finish with powder-coated perforated steel grill

Notes:

1- Maximum Peak SPL: Calculated by adding the loudspeaker’s sensitivity (1W at 1m) to the peak power (dBw) of the amplifier provided.

2- Directivity Index (DI): Difference between on-axis SPL and average SPL (considering all axes) for the specified coverage range. DI= 10 log Q

3- Directivity Factor (Q): Directivity index expressed as a power ratio Q=10 exp DI/10

4- Amplifier Power: The maximum sustained power at less than 1% clipping, averaged over the intended frequency range,

5- Input Sensitivity: The sine-wave input voltage required to reach amplifier clipping, measured within the frequency range used to determine Maximum Peak SPL, with the gain on “normal” and no gain reduction due to limiting.

6- Input Headroom/Clipping: Maximum input voltage.

7- Input Connector/Impedance: RF shunt capacitance should not reduce impedance by more than 30% at 20k Hz.