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.

Specification

• Channels - 4
• Class - D-Class
• Hi Level Input - Yes
• Low Level Input - Yes
• Digital Input - No
• Power supply voltage / fuse - 11 ÷ 15 VDC / 1 x 30A
• Operating power supply voltage - 6.5V ÷17 VDC
• Idling current - 1.6 A
• Idling current when off - 0.03 mA
• Consumption @ 14.4 VDC, 2Ω, Max Musical Power - 25 A
• Remote OUT - 6.5 ÷ 15 VDC (150 mA)
• Remote IN - 6.5 ÷ 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 Power - 0.03%
• Bandwidth A - 10Hz ÷ 35 kHz
• S/N ratio A - 100 dBA
• Damping factor A - 150
• Input sensitivity Pre-In - 0.2 ÷ 5 VRMS
• Input sensitivity Speaker-In - 0.8 ÷ 20 VRMS
• Total Power RMS - 520 W
• Minimum load impedance
• @ 4Ch: 2Ω
• @ 3Ch: 2Ω + 2Ω + 4Ω
• @ 2Ch: 4Ω
• Output Power (RMS) @14.4 VDC, 1% THD
• 4Ch 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 Crossover - Yes

CEA Specifications

• Output power @ 4Ω, 1% THD+N, 14.4 V - Output 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 Type - Pre-In / Speaker-In
• Filters Outputs - PRE OUT full range (Input A)
• Filter Pass A - Ch Filters: - Full Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• Filter Pass B - Ch Filters: - Lo-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• Filter Pass C - Ch Filters: - Full Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• Filter Pass D - Ch Filters: - Lo-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• Channel Mono - A/B Ch MONO IN (on/off) Yes
• Inputs/Outputs Bass Boost - B Ch (0 ÷12) dB