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HD1521

HIGH-DEFINITION POWERED 

LOUDSPEAKER

2/6 PAGES

HD1521 SPECIFICATIONS

Acoustic Performance

Frequency Response (–3 dB) 

50 Hz - 18 kHz

Frequency Range (–10 dB)  

40 Hz - 20 kHz

Horizonal Coverage (–6 dB) 

1

 

80˚ averaged 

 

2 kHz to 10 kHz

Vertical Coverage (–6 dB) 

1

 

50˚ averaged 

 

2 kHz to 10 kHz

Directivity Factor; Q (DI)  

14.0 (11.4), averaged  

 

2 kHz to 10 kHz

Max SPL peak (calculated) 

2

 

135 dB @ 1 m

Max SPL peak (measured) 

3

 

125 dB @ 1 m

Crossover Point 

1200 Hz

1

 HF horn can be rotated 90º if desired. 

2

 Calculated from driver sensitivity and amplifier power. 

3

 Measured with pink noise, free field at 1 meter, before limiting.

Input / Output

Input Type 

Female XLR, balanced differential

Input Impedance 

11 k  balanced

Loop Out Type 

Male XLR, balanced differential

Equalization

Low Shelving 

±3 dB @ 80 Hz (6 dB / octave)

Mid Peaking 

±3 dB, 100 Hz to 8 kHz, Q=1.5

High Shelving 

±3 dB @ 12 kHz (6 dB / octave)

Low-Frequency Power Amplifier

Rated Power 

700 watts rms 

 

1400 watts peak

Rated THD 

< 0.03%

Cooling 

Convection Extrusion

Design 

     Class D

High-Frequency  Power Amplifier

Rated Power 

100 watts rms 

 

200 watts peak

Rated THD  

< 0.03%

Cooling  

Convection Extrusion

Design 

Class D

Low-Frequency Transducer

Diameter 

15 in / 381 mm

Voice Coil Diameter 

3 in / 76 mm

Diaphragm Material 

Paper

Magnet Material 

Neodymium

High-Frequency Transducer

Voice Coil Diameter 

1.75 in / 44 mm

Horn Entry Diameter 

1 in / 25 mm

Diaphragm Material 

Heat treated titanium

Line Input Power

US 

100 - 120 VAC, 50 - 60 Hz, 1050W

Recommended amperage service 

9 amps

EU, CN 

200 - 240 VAC, 50 - 60 Hz, 1050W

Recommended amperage service 

5 amps

AC Connector 

3-pin IEC 250 VAC

Safety Features

RMS limiting, power supply and amplifier thermal protection

Construction Features

Basic Design 

Trapezoidal, 20˚ included angle

Material 

15 mm exterior grade premium birch plywood

Finish 

High durability black paint

Handles 

One on each side

Grille 

Powder coated galvanized steel

Display LEDs 

Power ON, EQ ON, Sig/Limit,  

 

Thermal protection, Front Power Light ON

Fly Points 

Twelve M10 x 1.5 mm

Operating Temperature 

0˚ - 40˚C 

 

32˚ - 104˚F

Physical Properties (packaged product)

Height 

33.0 in / 838 mm

Width 

21.0 in / 533 mm

Depth 

22.0 in / 559 mm

Shipping Weight 

89.0 lb / 40.4 kg

Physical Properties (product)

Height 

30.0 in / 762 mm

Front Width 

18.3 in / 464 mm

Rear Width 

11.8 in / 300 mm

Depth 

18.8 in / 478 mm

Net Weight 

80.0 lb / 36.3 kg

Mounting Methods

Floor mount, pole mount, or fly via 12 integrated threaded inserts 
using M10 x 1.5 x 37 mm forged shoulder eyebolts.

 

Options

PA-A2 Forged Shoulder Eyebolt Kit (4 x M10 x 1.5 mm x 37 mm)   
 

P/N 0028272

SPM200 Loudspeaker Pole Mount 

P/N 2035170-01

Ordering Information

HD1521 15” 2-Way High Definition Powered Loudspeaker, US 

 

 

P/N 0032628-00

HD1521 15” 2-Way High Definition Powered Loudspeaker, EU 

 

 

P/N 0032628-01

HD1521 15” 2-Way High Definition Powered Loudspeaker, CN 

 

 

P/N 0032628-05

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