Audison SR4.300 4 Channel D-Class Amplifier with Crossover

 Audison SR4.300 4 Channel D-Class Amplifier with Crossover 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 characterizes 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 aluminum 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 USSThanks 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 connectivityAll models have balanced high-level inputs for connecting to the OEM head unit 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 head unit'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. Specs Channels 4Class D-classHi Level Input YesLow Level Input YesDigital Input NoPower supply voltage / fuse 11 ÷ 15 VDC / 1 x 30AOperating power supply voltage 6.5V ÷17 VDCIdling current 1.6AIdling current when off 0.03mAConsumption @ 14.4 VDC, 2Ω, Max Musical Power 25ARemote 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 VDCAMPLIFIER STAGEDistortion - THD @ 100 Hz, 4Ω, 70% Rated Power 0.03%Bandwidth A 10Hz ÷ 35 kHzS/N ratio A 100 dBADamping factor A 150Input sensitivity Pre-In 0.2 ÷ 5 VRMSInput sensitivity Speaker-In 0.8 ÷ 20 VRMSTotal Power RMS 520WMinimum load impedance @4Ch: 2Ω@ 3Ch: 2Ω + 2Ω + 4Ω@ 2Ch: 4ΩOutput Power (RMS) @12.0 ÷ 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 YesCEA SPECIFICATIONSOutput power @ 4Ω, 1% THD+N, 14.4 V Output power @ 4Ω, 1% THD+N, 14.4 V: 75 W x 4 ChSN ratio (ref. 1W output) SN ratio (ref. 1W output): 82 dBAINPUTSInput Type Pre-In / Speaker-InFilters 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) YesInputs/Outputs Bass Boost B Ch (0 ÷12) dBOTHERWeight 1.56kgDIMENSIONSDimension A 190mmDimension B 160mmDimension C 155mmDimension D 135mmDimension E 47.5mm