Audison SR 4.500 Version 2 - 4-channel amplifier

Amplifier | 880W | 4×125W | D class

The Audison SR 4.500 4-channel amplifier with crossover offers great power in a small space (130 W x 4 @ 4Ω).
The electronic design of the Audison SR 4.500 paid attention to every aesthetic and functional detail.
The result is a compact extruded aluminum amplifier with rounded corners, making it easy to install the product in tight spaces.
Thanks to the generous heat sinks on the two short sides of the amplifiers, there is no need for internal fans, which often cause noise and dust accumulation.
In keeping with tradition, the SR amplifiers confirm their vocation for versatility by incorporating on all models a complete filter section suitable for any type of audio system configuration. The controls, protected by a satin aluminum plate, are located on the top of the amplifier, making them easily accessible from above even after the product has been installed.
If the system includes an Audison bit processor, the filter section can be omitted entirely.

AMPLIFIER SPECIFICATIONS

Channels: 4
Amplifier class: D-Class
Hi Level Input:  Yes
Low Level Input: Yes
Digital input: No
Supply voltage / Fuse:  11 ÷ 15 VDC / 2 x 25A
Power supply operating voltage:  6.5 ÷17 VDC
No-load current:  1.7 A
No-load current when switched off Condition:  0.09 mA
Power consumption @ 14.4 VDC, 2Ω, Max music power: 40 A
Remote OUT: 6.5 ÷ 15 VDC (150 mA)
Remote IN: 6.5 ÷ 15 VDC (1 mA)
ART - Automatic on/off with OUTPUT BTL speaker (selectable):  1.5 ÷ 7 VDC

AMPLIFIER SECTION

Distortion - THD @ 100 Hz, 4Ω, 70% Rated power:  0.08%
Bandwidth A:   10 Hz ÷ 35 kHz
S/N ratio A:  105 dBA
Damping factor A:  200
Input sensitivity Pre-In:  0.2 ÷ 5 VRMS
Input sensitivity Speaker-In:  0.8 ÷ 20 VRMS
Total power RMS 880 W

Minimum impedance:

• @4Ch: 2Ω
• @ 3Ch: 2Ω + 2Ω + 4Ω
• @ 2Ch: 4Ω

Output power (RMS) @14.4 VDC, 1% THD: 

• 4Ch 130W x 4 (4Ω)
• 4Ch 220W x 4 (2Ω) 
• 3Ch 120W x 2 (4Ω) + 480W x 1 (4Ω)
• 3Ch 220W x 2 (2Ω) + 440W x 1 (4Ω)
• 2Ch 450W x 2 (4Ω)

Adjustable crossover: Yes

CEA SPECIFICATIONS

Output power @ 4Ω, 1% THD+N, 14.4 V:   Output power @ 4Ω, 1% THD+N, 14.4 V: 125 W x 4 Ch
SN -Ratio (ref. 1W output):          < nonbreakingspace/> SN ratio (ref. 1W output): 83 dBA

INPUTS

Input Type:  Pre-In / Speaker-In
Filters Outputs:  PRE OUT full range (Input A)
Filter Pass A:  Front Ch Filters - Full Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
Filter Pass B:  Front Ch Filters - Full Lo-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
Filter Pass C:  Rear Ch Filters - Full Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
Filter Pass D:  Rear Ch Filters - Lo- pass: 50 ÷ 3.2k Hz @ 12 dB/Oct
Channel Mono:  A/B Ch MONO IN (on/off) Yes
Inputs/Outputs Sub CH:  ( -20 ÷ 6) dB
Input/Output Bass Boost:  B Ch (0 ÷12) dB

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Weight 2.12 kg