Ashly SRA-4075 4-Channel Convection Cooled Power Amplifier, 75W at 4 Ohms

The Ashly SRA-Series of amplifiers incorporates switch-mode-power supplies and Class-D amplifier circuitry, providing an extremely power-efficient solution. Four models in each series are available in two and four channel configurations with power ratings of 75W and 150W per channel. Features include: convection cooling, extremely low noise, an internally switchable 120V/240V power supply, extensive protection circuitry, euroblock inputs and screw terminal outputs.

SRA-Series amplifiers are housed in a compact 1RU chassis weighing only 10 lbs. and are designed to drive four or eight ohm loads. Front panel features include: level attenuators for each channel, signal present and clip alert status LEDs for each channel. Rear panel features include: rear panel switches to select between two choices of input sensitivity, HPF frequencies and normal or bridged mode, remote power turn-on/off and adjustable turn-on delay up to eight seconds. Two-channel versions have a stereo headphone jack located on the front panel.

Features

• Convection cooling
• Extremely low noise
• Extensive protection circuitry
• Level attenuators for each channel
• Signal present and clip alert status LEDs
• Selectable input sensitivity
• Defeatable 80Hz HPF
• Euroblock inputs/outputs
• Stereo or bridged mode switch per channel pair
• Remote stand-by control
• Adjustable turn-on delay up to 8 seconds
• Stereo headphone jack (on 2-channel models)
• Safety/Compliance: cTUVus, CE, FCC, RoHS

Specifications

• Frequency Response (8 Ohms): 20Hz–20kHz, ±1.0dB
• Distortion (SMPTE, typical): < 0.5% - 8 Ohm load, 10dB below rated power
• Distortion (THD-N, typical): < 0.5% - 8 Ohm load, 10dB below rated power, 20Hz–20kHz
• Damping Factor (8 Ohm load, < 1 kHz): > 200 into 8 Ohms
• Input Impedance: 20k Ohms, Balanced
• Input Sensitivity: 1dBu (75W), 4dBu (150W)
• Gain: 26dBu, 36dBu, Selectable
• Maximum Input Level: +21dBu
• HPF: 80Hz 2nd Order, defeatable
• Cooling: Convection
• Output Circuitry: Class D
• Amplifier/Load Protection: Output Overcurent, DC Output, Main Supply Rail Overvoltage, Chassis Temperature, Inrush Limiting, Mains Fuse
• Environmental: 40-120° F, (4-49° C) noncondensing
• Front Panel
  • Controls: AC Power Switch, Level
  • Indicators (LED color): Power (Blue), Standby (Yellow), Protect (Red), Signal (Green), Clip (Red)
• Rear Panel
  • Controls: 80Hz HPF, Gain/Sensitivity: +26dB, +36dB, Bridge/Stereo Switch, Remote Standby, Delay
  • Input Connector: 3-Pin Euroblock
  • Output Connector: Euroblock
  • Cordset: 3-Prong IEC
• Channels: 4
• Max Output Power: Per Channel, 20Hz–20KHz, 1% THD All Channels Driven
  • 4 Ohms: 75W
  • 8 Ohms: 40W
  • 8 Ohms (bridged): 150W
• Line Current Draw: All Channels Driven @ 4 Ohms
  • Standby Mode: 39mA
  • No Signal: 565mA
  • Typical (1/8 power poink noise): 1.25A
  • Max (1/3 power pink noise): 2.25A
• Thermal Dissipation: BTU/hr, All Channels Driven @ 4 Ohms
  • Standby Mode: 13
  • No Signal: 113
  • Typical (1/8 power poink noise): 145
  • Max (1/3 power pink noise): 150
• Signal to Noise (20Hz–20kHz, unweighted): >100dB
• Dimensions (W x H x D): 19 x 1.75 x 11 in (483 x 45.5 x 279.4 mm)
• Unit Weight: 9.4 lbs (4.27 kg)
• Shipping Weight: 16lbs (8kg)
• Power Req.: 120VAC, 240VAC ±10%, 50/60Hz (factory set)