The SRA Series SRA-4075 Convection-Cooled Power Amplifier from Ashly is a 4-channel convection-cooled rackmount P.A. or studio power amplifier housed in a rugged 1-RU metal chassis, offering an output of 40 W 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 9.4 lb. lightweight rackmount 4-channel power amplifier with 40W 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 (+26/+36 dB)
Up to 8 seconds 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, and mains fuse
Front panel indicators include overall power, standby, and protect along with per-channel clip and signal indicators
Euroblock input connectors, screw terminal outputs

Ashly SRA-4075 Specs
Number of Channels 2
Power Rating 8 Ohms:
4 x 40 W per Channel
4 x 150 W Bridged
4 Ohms:
4 x 75 W per Channel
Amplifier Class Class-D
Performance
Protections On/Off Muting
Frequency Response 20 Hz to 20 kHz ±1 dB
Damping Factor > 200 at 8 Ohms
Input Sensitivity +1 dBu or +4 dBu
Input Impedance 20 Kilohms (Balanced)
Max Gain 36 dB
SNR > 100 dB
THD 8 Ohms:
< 0.5% (Full Range, at Rated Power -10 dB) Signal Processing Filters 2 x High-Pass: 80 Hz Connectivity I/O 4 x Euroblock 3-Pin Input 4 x Screw Terminal Output Power Current Consumption 39 mA (Standby) 565 mA (Idle) 1.25 A (1/8 Power, Typical) 2.25 A (1/3 Power, Max) Physical Display & Indicators 1 x Blue LED (Power) 1 x Yellow LED (Standby) 1 x Red LED (Protect) 4 x Red LED (Clip) 4 x Green LED (Signal) Cooling Convection Dimensions 19.0 x 1.8 x 11.0" / 483.0 x 45.5 x 279.4 mm Weight 9.4 lb / 4.3 kg Packaging Info Package Weight 19 lb Box Dimensions (LxWxH) 16 x 16 x 4"