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hertz-audio.com
All Specifications Subject to Change Without Notice_23.A
1. Up to 87% efficiency thanks to ADC (Advanced D-Class) output stage, ensuring
high audio performance in a compact size.
2. USS (Universal Speakers Simulators) allows SP 1.900 to work with head units
featuring the “speaker load detection” circuit.
3. 1000 W RMS (1Ω) with ultra-compact size: 211.6 x 130 x 49 / 8.33 x 5.12 x
1.93 (mm/inch)
4. IP55 aluminium chassis for maximum protection against humidity and external
agents.
5. No cooling fan to prevent internal accumulation of dirt.
6. Sealed power cord, line inputs and speaker outputs to prevent oxidation.
7. Crossovers filters and controls on a single side to facilitate calibration when the
product is installed.
8. Balanced fully differential high-noise rejection inputs.
9. ART (Automatic Remote Turn-On/Off) automatically turns on/off the amplifier
when the OEM head-unit turns on/off (can be enabled/disabled).
10. 24 dB continuous adjustable (50 to 250 Hz) Lo-Pass subwoofer filter.
11. SUBSONIC11. filter (24 dB - 25 Hz), removes very low subsonic frequencies
from music signal to avoid damages to the subwoofer.
12. The optional HRC BM Remote Volume Control provides the ability to adjust the
subwoofer volume level from the dashboard.
SP 1.900
D-CLASS MONO AMPLIFIER
1000 W
A 205 mm 8.07 in.
B 211.6 mm 8.33 in.
C 107 mm 4.21 in.
D 130 mm 5.12 in.
E 49 mm 1.93 in.
Sealed connectors
HRC BM optional
E
POWER SUPPLY
Nominal power supply voltage 11 ÷ 15 VDC
Pulse Operating voltage 6 ÷ 16 VDC
Idling current 1.1 A
Idling current when off 0.03 mA
Consumption @ 14.4 VDC, MIN load
impedance (Max Musical Power)
50 A
Remote IN 6 ÷ 15 VDC (9 mA)
DC-REM - Remote Turn on by SPK DC
from BTL speakers outputs
3.5 ÷ 7 VDC
AMPLIFIER STAGE
Distortion - THD @ 1 kHz, 4Ω, 70% Rated Power <0.1%
Damping factor @ 1 kHz, 4Ω, 2 VRMS >300
Bandwidth @ -3 dB 10 Hz ÷ 500 kHz
S/N ratio (A weighted @ 1 V Input) 95 dBA
Pre-In sensitivity 0.6 ÷ 6 VRMS
Speaker-In sensitivity 2.2 ÷ 22 VRMS
Minimum load impedance 1Ω
Output power (RMS) @14.4 VDC, 1% THD:
1Ch 600 W x 1 (4Ω)
1Ch 1000 W x 1 (2Ω)
1Ch 1000 W x 1 (1Ω)
INPUTS / OUTPUTS / FILTERS
Inputs Pre IN / Speaker IN
Filters:
OFF
Lo-pass: 50 ÷ 250 Hz @ 24 dB/Oct.
Subsonic: 25 Hz @ 24 dB/Oct.
Phase: 0 ÷ 180°
Bass Boost 45Hz (adjustable) (0 ÷ 8 dB) [LP = ON only]
CEA SPECIFICATION
Output power @ 4Ω
1% THD+N, 14.4 V
500 W x 1 Ch
SN ratio (ref. 1 W output) 81 dBA
SIZE / WEIGHT
Max size (mm/inch) 211.6 x 130 x 49 / 8.33 x 5.12 x 1.93
Weight (kg/lbs) 2.15 / 4.74
GENERAL
IP Rating IP55
Operating Temperature Range 0°C (32°F) to 55°C (131°F)
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