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Page - 4 Operator Manual – SRA Series Amplifiers
Copyright© 2010 – Ashly Audio Inc.
The SRA Series
SRA-Series amplifiers are high-efficiency, lightweight amplifiers incorporating the latest
amplifier technologies.
The series provides a power range of 75 to 150 watts per channel at 4 ohms (20Hz-20kHz,
1% THD). The SRA series is available in 2 and 4 channel versions at two power points. All
models will drive 4 or 8 ohm loads. All models are 1RU, with the two and four channel
versions weighing 9 pounds and 10 pounds respectively. All SRA amplifiers utilize a state-
of-the-art, efficient, high speed switched mode power supply and offer remote power on/off
among the many standard features.
SRA-Series Power Ratings (per channel)
Stereo Mono Bridged
Model 8Ω 4Ω 8Ω
SRA-2075 40 W 75 W 150 W
SRA-4075 40 W 75 W 150 W
SRA-2150 80 W 150 W 300 W
SRA-4150 80 W 150 W 300 W
• Input connections are via 3-pin Euroblock connectors.
• Output connectors are screw terminal strips.
• Rear panel switches include: Gain and Operation Mode.
Protection
SRA-Series Amplifiers come standard with several protection circuits:
Output over-current protection - The output current is limited to safe levels
regardless of load.
DC output protection - The amplifier is switched off if more than 2 volts of
dc is present on the output. The amplifier will automatically restart after 5
seconds (if no fault remains). The protect LED is lit as well as the clip LED of
the affected channel(s).
Main supply rail overvoltage protection - The amplifier is switched off if
the main supply rails have too high of a voltage. The amplifier will
automatically restart after 5 seconds (if no fault remains). The protect LED is
lit as well as the clip LED of the affected channel(s).
Chassis internal temperature monitoring - The amplifier is switched off
when the internal ambient temp reaches 70º C. The amplifier will again switch
on when the internal ambient temp reaches 55º C. The protect LED is lit as
well as the clip LED of ALL channels.
Inrush limiting - The turn-on current is limited. This is active during initial
startup as well as when exiting standby mode.
Mains fuse - There is a 5 amp time delay fuse.
Important Safety
Instructions – 2
Introduction - 3
The SRA Series - 4
Protection
Physical Description - 5
Installation - 6
Operation - 8
Troubleshooting - 9
Spec Table - 10
Dimensions - 11
Warranty - 12