Ashly TRA-Series Operating Manual page 4

Page - 4
Important Safety
The TRA Series
Instructions – 2
Introduction - 3
TRA-Series amplifiers are high-efficiency, amplifiers incorporating the latest amplifier
The TRA Series - 4
technologies.
Protection
Physical Description - 5
The series provides a power range of 75 to 150 watts per channel at 4 ohms (20Hz-20kHz,
1% THD). The TRA series is available in 2 and 4 channel versions at two power points. All
Installation - 6
models will drive 4 or 8 ohm loads as well as 25V, 70V, and 100V constant voltage lines.
Operation - 8
All models are 2RU, with the two and four channel versions weighing 19.5 pounds and 29.5
Troubleshooting - 9
pounds respectively. All TRA amplifiers utilize a state-of-the-art, efficient, high speed
Spec Table - 10
switched mode power supply and offer remote power on/off among the standard features.
Dimensions - 11
Warranty - 12
Input connections are via 3-pin Euroblock connectors.
Output connectors are screw terminal strips.
Controls on the rear panel include: Gain and channel attenuation.
TRA-Series Power Ratings (per channel)
Model
TRA-2075
TRA-4075
TRA-2150
TRA-4150
Protection
TRA-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.
Operator Manual – TRA Series Amplifiers
Stereo
8Ω 4Ω
40 W 75 W
40 W 75 W
80 W 150 W
80 W 150 W
Copyright© 2012 – Ashly Audio Inc.
Constant Voltage
25/70V/100V
75 W
75 W
150 W
150 W