Amplifier ' 520 W total power ' 4 x 130 W @ 2ohm ' D-class

Audison SR 4.300 4-channel amplifier with crossover and great power packed into ultra-compact dimensions (85 W x 4  4Ω)SR line, perfected by taking full advantage of the capabilities of the latest amplification devices. 

After numerous listening tests with professionals and enthusiasts, Audison's R&D team decided to adopt a new class D technology called ADT (Audison D-Class Technology) for this line of amplifiers, which has made it possible to considerably reduce their size, totally preserving the audio performance that characterises every Audison design.

As far as the electronic design is concerned, every aesthetic and functional detail of the Audison SR 4.300 has been taken care of, resulting in a compact amplifier made of extruded aluminium 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.

Audison USS

Thanks to the integration of Audison USS (Universal Speakers Simulator) technology in the high level inputs, the SR amplifiers can also be conveniently connected to OEM sources equipped with the 'speaker load detection' function, which monitors the presence of a low impedance load enabling the audio outputs.

Audison SR 4.300 allows multiple connectivity

All models have balanced high-level inputs for connecting to the OEM headunit speaker output and a low-level RCA for after-market speakers. 

When using the high-level input, the ART (Automatic Remote On/Off) function can be enabled to control the amplifiers' power-up with the headunit's power button. In addition, there is a remote IN / OUT socket to allow control of multiple amplifiers in cascade that turn on when needed.

Through the PRE-OUT signal using the Speaker-IN socket it is possible to interface the amplifier with OEM sources that only have amplified outputs, allowing for system expansion.

AMPLIFIER TECH DATA

Channels4

ClassD-Class

Hi Level InputYes

Low Level InputYes

Digital InputNo

Power supply voltage / fuse11 ÷ 15 VDC / 1 x 30A

Operating power supply voltage6.5V ÷17 VDC

Idling current1.6 A

Idling current when off0.03 mA

Consumption @ 14.4 VDC, 2Ω, Max Musical Power25 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 Power0.03%

Bandwidth A10Hz ÷ 35 kHz

S/N ratio A100 dBA

Damping factor A150

Input sensitivity Pre-In0.2 ÷ 5 VRMS

Input sensitivity Speaker-In0.8 ÷ 20 VRMS

Total Power RMS520 W

Minimum load impedance@ 4Ch: 2Ω

@ 3Ch: 2Ω + 2Ω + 4Ω

@ 2Ch: 4Ω

Output Power (RMS) @14.4 VDC, 1% THD4Ch 85 W x 4 (4Ω)

4Ch 130 W x 4 (2Ω)

3Ch 80 W x 2 (4Ω) + 250 W x 1 (4Ω)

3Ch 130W x 2 (2Ω) + 260 W x 1 (4Ω)

2Ch 250 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: 75 W x 4 Ch

SN ratio (ref. 1W output)SN ratio (ref. 1W output): 82 dBA

INPUTS

Input TypePre-In / Speaker-In

Filters OutputsPRE OUT full range (Input A)

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

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

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

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

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

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