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Hertz  |  SKU: SP4.500-Plug-N-Play-98-13

Hertz SP4.500 600W RMS 1000W Peak Advanced Class D Amplifier With Plug & Play Wiring for 1996-2013 Harley-Davidson® Motorcycles

$000 USD
Taxes, discounts and shipping calculated at checkout.


For your convenience, we offer this amplifier pre-wired for factory Harley radios (flash required), as well as aftermarket models.

We have completed all the hard work for you, making this a true plug and play setup! We have pre-set the gains and high pass filters to exactly what they need to be for the radio you have! We've also connected the power and ground wires, so all you have to do is plug into the radio harness and run the power and ground wires to your battery, then your system will be rockin'!

General Specs
Channels 4 - 3 - 2
Nominal power supply voltage 11 ÷ 15 VDC
Pulse Operating voltage 6 ÷ 16 VDC
Idling current 0.9 A
Idling current when off 0.03 mA
Consumption @ 14.4 VDC, MIN load impedance (Max Musical Power) 27 A
Remote IN 6 ÷ 15 VDC (9 mA)
DC-REM - Remote Turn on by SPK DC from OUTPUT BTL speakers 3.5 ÷ 7 VDC
Distortion - THD @ 1 kHz, 4Ω, 70% Rated Power <0.02%
Damping factor @ 1 kHz, 4Ω, 2 VRMS >150
Bandwidth @ -3 dB 10 Hz ÷ 35 kHz
S/N ratio (A weighted @ 1 V Input) 100 dBA
Pre-In sensitivity 0.6 ÷ 6 VRMS
Speaker-In sensitivity 2.2 ÷ 22 VRMS
Minimum load impedance:  
@ 4Ch
@ 3Ch 2Ω + 2Ω + 4Ω
@ 2Ch
IP Rating IP55
Operating Temperature Range 0°C (32°F) to 55°C (131°F)
Max size (mm/inch) 192.7 x 130 x 49 / 7.58 x 4.18 x 1.9
Weight (kg/lbs) 2.15 / 4.74
Adjustable Crossovers yes
Output Power
Output Nominal Power (RMS) @ 14.4 VDC, THD 1%:  
4 Ch: 90 W x 4 (4Ω)
4 Ch: 150 W x 4 (2Ω)
3 Ch: 80 W x 2 (4Ω) + 330 W x 1 (4Ω)
3 Ch: 145 W x 2 (2Ω) + 300 W x 1 (4Ω)
2 Ch: 300 W x 2 (4Ω)
Total Power RMS 600 W
INPUTS / FILTERS
INPUTS: Pre IN / Speaker IN
Ch 1-2  
Full Yes
Hi-pass 50 ÷ 5k Hz @ 12 dB/Oct.
Lo-pass: 50 ÷ 5k Hz @ 12 dB/Oct.
Ch 3-4  
Full Yes
Hi-pass 50 ÷ 5k Hz @ 12 dB/Oct.
Lo-pass 50 ÷ 5k Hz @ 12 dB/Oct.
Bass Boost 45Hz (adjustable) OUT 3 - 4 (0 ÷ 8) dB [LP = ON only]
Physical Specs
SP 4.500
  mm in
A 185.7 7.31
B 192.7 7.58
C 107 4.21
D 130 5.12
E 49 1.93

Hertz ADC 

(Advanced D-Class)

SP 4.500 Ch: 4 - 3 - 2 | 600 W


SP 4.500 features Hertz ADC (Advanced D-Class) output stage, reaching up to 85% efficiency and delivering an impressive power rating of 90 x 4 (4Ω) W RMS or300 W x 2 (4Ω) W RMS when bridged, with an ultra-compact size of 192.7 (7.58) x 130 (5.1) mm (in.) x 49 (1.9).