Audison SR 4.300 4-Channel Class-D Amplifier

This product is the recently renewed Audison SR 4.300, a 4-channel class-D amplifier with 85 watts per channel at 4 ohms. Initially launched in 1988, it has since been continuously updated with the latest and most advanced technologies.

Headquartered in Potenza Picena, Italy, the Audison design team spent extensive time meticulously planning and perfecting the new SR line. Utilizing the latest amplification devices, the team conducted numerous double-blind listening tests with professionals and enthusiasts to determine the best technology for the range. As a result, the entire range now employs ADT (Audison D-Class Technology), reducing the size of the amplifiers while maintaining the high-quality audio performance seen in all Audison projects.

EDGELESS DESIGN
The Audison style center has meticulously designed the electronics, ensuring both aesthetic appeal and functionality. This results in a sleek, compact amplifier made of extruded aluminum with rounded corners, perfect for installation in tight spaces. With ample heat dissipation on both sides, the need for internal cooling fans is eliminated, preventing noise and dust buildup.

COMPLETE CONTROLS ON UPPER PANEL
The SR amplifiers embrace their versatility with a complete filter section included in all models, making it perfect for any audio system setup. The controls, found on the upper panel of the satin-finish aluminum panel, are easily accessible from above even after installation. With the addition of an Audison bit processor, the filter section can be fully disabled.

 
The high-level inputs of Audison SR amplifiers allow for appropriate connection to OEM sources with the "speaker load detection" function. This is due to the integration of Audison USS technology, which provides a dynamic load circuit that can adjust to different load levels. This allows for future-proofing, as well as preventing issues with current or heat dissipation.

LIMITLESS CONNECTIVITY

All models come with high-level balanced inputs to connect with OEM Head Unit speakers and low RCA level inputs for after-market ones. If high-level input is used, the ART function (Automatic Remote Turn-On / Off) can be activated to control turning on of amplifiers with the head unit switch-on button. Additionally, a remote IN / OUT socket can be used to control multiple cascaded amplifier switch-ons when needed. The SR 1.500, SR 4.300, and 4.500 models replicate the PRE-OUT signal using the Speaker-IN input to connect with OEM sources that only have amplified outputs, allowing for system expansion.

POWER SUPPLY

• 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 IN 6.5 ÷ 15 VDC (1 mA)
• Remote OUT 6.5 ÷ 15 VDC (150 mA)
• ART - Automatic Remote Turn on/off from
• OUTPUT BTL speakers (Selectable) 1.5 ÷ 7 VDC

AMPLIFIER STAGE

• Distortion - THD @ 1 kHz, 4Ω, 70% Rated Power 0.03%
• Damping factor @ 1 kHz, 4Ω, 2 VRMS 150
• Bandwidth @ -1.5 dB 10Hz ÷ 35 kHz
• S/N ratio (A weighted @ 1 V Input) 100 dBA
• Pre-In sensitivity 0.2 ÷ 5 VRMS
• Speaker-In sensitivity 0.8 ÷ 20 VRMS
• 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)
• INPUTS / OUTPUTS
• Inputs Pre-In / Speaker-In

Outputs PRE OUT full range (Input A)

• Front Ch Filters:
• Full
• Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• Lo-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• Rear Ch Filters:
• Full
• Hi-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• Lo-pass: 50 ÷ 3.2k Hz @ 12 dB/Oct.
• A/B Ch MONO IN (on/off) Yes
• Bass Boost 50Hz (adjustable) B Ch (0 ÷12) dB

SIZE

•  W x H x D : 7.48" x 6.10" x 1.87"