Ashly 4075 Dépliant

The power amplifiers shall consist of two separate models (4075, 

4150), being of four channels, and shall deliver a minimum 

power of 40 or 80 watts RMS per channel into 8 ohm loads and 

75 or 150 watts RMS per channel into 4 ohms depending on the 

model being used. The amplifiers shall have internally mounted 

transformers to provide both 70V and 100V constant voltage. 

Each channel shall deliver a minimum of 75W or 150W, model 

depending, to the constant voltage lines.

Dimensions of the amplifiers shall be 19”W x 3.5”H x 11.0”D, 

with a weight of 29.5 pounds. The amplifiers shall utilize a state-

of-the-art, efficient, switched mode power supply. The power 

supply shall operate at either 120 or 240VAC, 50/60Hz. The 

amplifier shall be convection cooled.

 

The amplifier shall have a selectable input gain of 26dB or 36dB. 

Frequency response shall be 20 Hz - 20 kHz, +/- 1.0 dB.  Hum 

and noise shall be greater than 98dB and greater than 105dB 

repectively below full output (20Hz to 20KHz unweighted).

Each amplifier channel shall be supplied with an attenuator 

located on the rear panel. Each input shall have a fixed high pass 

filter of 12dB/octave at 80Hz. 

The inputs shall be active balanced design, with an impedance 

of 20K ohm with a maximum input level of +21dBu. Input con-

nections shall be 3-pin Euroblock. Output connectors shall be a 

screw terminal strip with safety cover. 

The amplifiers shall have front panel indicators for power, stand-

by and protect. Each channel shall have a 6-step signal level 

meter indicating -24db, -18dB, -12dB, -6dB, -3dB and clip alert.  

The amplifier shall have built in protection for Output Over-

Current, DC Output, Main Supply Rail Overvoltage, Chassis 

Internal Temperature, Inrush Limiting and Mains Fuse.

The amplifer shall have a 2-pin Standby Connector to provide 

for remote standby switching with a 0.5 second turn-on delay. 

Additionally, the amplifier shall have user selectable Delay 

Switches to provide incremental turn-on delay when the Standby

connector is used. The switches shall be additive, providing as 

much as 7.5 seconds of delay to the 0.5 second Standby delay.

The amplifier shall have a cTUVus safety listing and shall be in 

compliance with FCC, CE and RoHS regulations.

The amplifier shall be covered under a full limited warranty of not 

less than five years. The amplifier shall be an SRA-Series two-

channel model, manufactured by Ashly Audio, Inc. of Rochester, 

New York.

Features

• 2RU Chassis
• 4 Independent Channels
• High Efficiency Switched Mode Power 

Supply

• Class-D Output Circuitry
• Input Attenuators On Rear Panel

• Input Sensitivity 26dB or 36db
• Remote Power Turn-On/Off
• Adjustable Turn-on Delay
• Convection Cooled
• 6-Step Signal Level and Clip LEDs
• Safety/Compliance: cTUVus/FCC, 

CE, RoHS

Technical Notes & Specifications

TRA-Series  4075 and 4150 Four-Channel Amplifiers