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FREE SG Delivery above SGD 100  |  All Prices inclusive of GST

SGD 1,526.00

Availability: In stock

Power Amplifier, 4 x 75W @ 4-OHMs

Only 1 left

Price includes 7% GST



The Ashly SRA-4075 is a 4-channel convection-cooled rackmount P.A. or studio power amplifier housed in a rugged 1RU metal chassis, offering an output of 40 Watts per channel at 8 Ohms, designed to drive 4 and 8 Ohm loads.


The SRA-4075 incorporates a switch-mode-power supply and Class-D amplifier circuitry, providing a power-efficient solution. The low-noise unit features a switchable HPF filter and selectable gain sensitivity, turn-on delay DIP switches with up to 8 seconds of delay available and dual or bridge modes of operation.

The SRA-4075 is equipped with an internally switchable 120V/240V power supply, extensive protection circuitry, and standard Euroblock inputs along with screw terminal outputs.




  • 1RU 10 lb. lightweight rackmount 4-channelpower amplifier with 40 Watts per channel power output at 8 Ohms

  • Selectable Dual or Bridge Mono Operation, designed for 4- or 8-Ohm loads

  • 2-stage high-efficiency switched mode power supply with high power-to-weight ratio

  • Ultra-quiet convection-cooled operation

  • On-board 80Hz HPF, selectable gain sensitivity

  • Up to 8 sec. of turn-on delay with selectable Dip Switch complement

  • Comprehensive amplifier protection circuitry includes: Output Over-current, DC Output, Main Supply Rail Over-voltage, Chassis Temperature, Inrush Limiting, Mains Fuse

  • Front Panel Indicators include: overall power, standby, and protect; per-channel clip and signal indicators

  • Euroblock input connectors, Screw Terminal outputs


Power Rating

Stereo @ 8 Ohms: 4 x 40W per Ch.

Stereo @ 4 Ohms: 4 x 75W per Ch.

Mono Bridge @ 8 Ohms: 4 x 150W per Ch.

Damping Factor >200, 8-Ohm load, <1kHz
Input Sensitivity 1.5V
Input Impedance 20 kOhms, Balanced
Gain Selectable 26dB or 36dB
Frequency Response 20 Hz - 20 kHz, +/-1.0dB
Signal-to-Noise Ratio >98dB, 20Hz - 20kHz unweighted
Total Harmonic Distortion (THD) <0.01% (8-Ohm load, 10dB below rated power, 20Hz - 10kHz
Input Connections 4 x Ch.1,2,3,4 3- Pin Euroblock
Output Connectors 4 x Ch.1,2,3,4 Screw Terminals
Controls Front Panel

1 Power Switch

4 x Gain Control Knobs

Controls (Rear)

4 x Delay DIP Switches

2 x 80Hz HPF On/Off Button

2 x Gain Sensitivity Button

2 x Bridge/Stereo Mode Switch


1 x Blue Power On LED

1 x Yellow Standby LED

1 x Red Protect LED

4 x Red Clip LED's

4 x Green Signal LED's

Cooling Convection-cooled
Power Consumption

37.5W (1/8 Power Pink Noise @ 4 Ohm)

Typical Current:

Idle: 0.52A

1/8 Power: 1.24A

Dimensions 19 x 1.75 x 11" (483 x 44.5 x 279.4mm)
Weight 10 lb (4.5 kg)

Adjustable Turn-On delay Switches

Convection Cooling

Switch-Mode Power Supply


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