The Audison SR 4.500 4-channel amplifier with crossover features great power packed into ultra-compact dimensions (130 W x 4 @ 4Ω).As far as the electronic design is concerned, every aesthetic and functional detail of the Audison SR 4.500 has been taken care of, resulting in a compact amplifier made of extruded aluminum with rounded corners, which facilitates the installation of the product in narrow spaces. 

Thanks to the generous heat sinks on the two short sides of the amplifiers, there is no need for internal cooling fans, which often cause noise and dust accumulation. 

In keeping with tradition, the SR amplifiers confirm their vocation for versatility by including on all models a complete filter section, suitable for any kind of audio system configuration. 

The controls, protected by a satin-finished aluminium panel, are located on the top panel of the amplifier, so that they can be easily reached from above, even after the product has been installed. 

When the system includes an Audison bit processor, the filter section can be totally excluded.

AMPLIFIER TECH DATA

Channels4

ClassD-Class

Hi Level InputYes

Low Level InputYes

Digital InputNo

Power supply voltage / fuse11 ÷ 15 VDC / 2 x 25A

Operating power supply voltage6.5 ÷17 VDC

Idling current1.7 A

Idling current when off0.09 mA

Consumption @ 14.4 VDC, 2Ω, Max Musical Power40 A

Remote OUT6.5 ÷ 15 VDC (150 mA)

Remote IN6.5 ÷ 15 VDC (1 mA)

ART - Automatic Remote Turn on/off from OUTPUT BTL speakers (Selectable)1.5 ÷ 7 VDC

AMPLIFIER STAGE

Distortion - THD @ 100 Hz, 4Ω, 70% Rated Power0.08 %

Bandwidth A10 Hz ÷ 35 kHz

S/N ratio A105 dBA

Damping factor A200

Input sensitivity Pre-In0.2 ÷ 5 VRMS

Input sensitivity Speaker-In0.8 ÷ 20 VRMS

Total Power RMS880 W

Minimum load impedance@4Ch: 2Ω

@ 3Ch: 2Ω + 2Ω + 4Ω

@ 2Ch: 4Ω

Output Power (RMS) @14.4 VDC, 1% THD4Ch 130 W x 4 (4Ω)

4Ch 220 W x 4 (2Ω)

3Ch 120 W x 2 (4Ω) + 480 W x 1 (4Ω)

3Ch 220 W x 2 (2Ω) + 440 W x 1 (4Ω)

2Ch 450 W x 2 (4Ω)

Adjustable CrossoverYes

CEA SPECIFICATIONS

Output power @ 4Ω, 1% THD+N, 14.4 VOutput power @ 4Ω, 1% THD+N, 14.4 V: 125 W x 4 Ch

SN ratio (ref. 1W output)SN ratio (ref. 1W output): 83 dBA

INPUTS

Input TypePre-In / Speaker-In

Filters OutputsPRE OUT full range (Input A)

Filter Pass AFront Ch Filters - Full Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.

Filter Pass BFront Ch Filters - Full Lo-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.

Filter Pass CRear Ch Filters - Full Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.

Filter Pass DRear Ch Filters - Lo-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct

Channel MonoA/B Ch MONO IN (on/off) Yes

Inputs/Outputs Sub CH(-20 ÷ 6) dB

Inputs/Outputs Bass BoostB Ch (0 ÷12) dB