SKU: 60938312354

Ashly TRA-4075 Rackmount 4-Channel Power Amplifier With 70V100V Transformer - 40 Watts Per Channel At 8 Ohms

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Description

Ashly TRA-4075 Rackmount 4-Channel Power Amplifier With 70V100V Transformer - 40 Watts Per Channel At 8 OhmsAshly TRA 4075 overview The Ashly TRA 4075 is a 4 channel convection cooled rackmount P. A. or installation power amplifier housed in a rugged 2RU metal chassis, offering an output of 40 Watts per channel at 8 Ohms, designed to drive 4 and 8 Ohm loads and transformer coupled 70V and 100V lines simultaneously. The coupling transformers are internally mounted. The TRA 4075 incorporates a switch mode power supply and Class D amplifier circuitry,

Ashly TRA-4075 overview

 

The Ashly TRA-4075 is a 4-channel convection-cooled rackmount P.A. or installation power amplifier housed in a rugged 2RU metal chassis, offering an output of 40 Watts per channel at 8 Ohms, designed to drive 4 and 8 Ohm loads and transformer-coupled 70V and 100V lines simultaneously. The coupling transformers are internally mounted.

 

The TRA-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 rear-mounted set-and-forget gain controls.

The TRA-4075 is equipped with an internally switchable 120V/240V power supply, extensive protection circuitry, and standard Euroblock inputs along with screw terminal outputs.

2RU rackmount 4-channel power amplifier with 40 Watts per channel power output at 8 Ohms and built-in 60W/70V transformer
Designed to simultaneously drive 4- or 8-Ohm loads and 70V/100V transformer-coupled lines
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
Up to 8 sec. 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, Mains Fuse
Front Panel Indicators include: overall power, standby, and protect; per-channel clip and signal indicators
Euroblock input connectors, Screw Terminal outputs

Ashly TRA-4075 specs

Power Rating Stereo @ 8 Ohms: 4 x 40W per Ch.
Stereo @ 4 Ohms: 4 x 75W per Ch.
Stereo @ 70V: 4 x 75W per Ch.
Stereo @ 100V: 4 x 75W per Ch.
Damping Factor >200, 8-Ohm load, <1kHz
Input Sensitivity 1.5V
Input Impedance 20 kOhms, Balanced
Gain Selectable 26dB or 36dB
Frequency Response 20 Hz - 20 kHz, +/-1.0dB
Signal-to-Noise Ratio >98dB, 20Hz - 20kHz unweighted
Total Harmonic Distortion (THD) <0.01% (8-Ohm load, 10dB below rated power, 20Hz - 10kHz
Input Connections 4 x Ch.1,2,3,4 3- Pin Euroblock
Output Connectors 4 x Ch.1,2,3,4 Screw Terminals
Controls Front Panel 1 x Power Switch
Controls (Rear) 4 x Gain Control Knobs
4 x Delay DIP Switches
4 x 80Hz HPF On/Off Buttons
4 x Gain Sensitivity Buttons
Indicators 1 x Blue Power On LED
1 x Yellow Standby LED
1 x Red Protect LED
4 x Red Clip LED's
12 x Green -24/-18/-12dB Signal LED's 
8 x Yellow -6/-3dB Signal LED's
Cooling Convection-cooled
Power Consumption 37.5W (1/8 Power Pink Noise @ 4 Ohm)
Typical Current:
Idle: 0.52A
1/8 Power: 1.24A
Dimensions 19 x 3.5 x 11" (483 x 89 x 279.4mm)
Weight 29.5 lb (13.4 kg)
Specialties Adjustable Turn-On delay Switches
Convection Cooling
Switch-Mode Power Supply

Shipping Notes
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Exchange/Return Notes
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SKU: 60938312354

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Wilson Xu
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★★★★★ 5
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I bought this butyl repair patch and the quality is good. I brought it to the school where I’m learning automotive repair and used it as a teaching consumable. Many students tried it, and everyone thought it worked very well. One thing I would suggest for individual buyers: pay attention to the size combinations in the package. For most car owners, you may end up using only one size more often. Because of that, this mixed-size packaging is probably more suitable for schools, training programs, or auto repair shops where different sizes are needed regularly. Overall, it’s still a good quality product and performs exactly as expected.
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Reviewed in the United States on March 15, 2026
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Jon P Summers
Los Angeles, US
★★★★★ 4
Look very useful
Size: 0.16 x 1.42 ,0.24 x 1.77 ,0.35 x 2.36 Inch
Haven't actually used them yet, but they look like the perfect way to fix a flat. As can be seen they come in various sizes depending on what you will need. All you need to get is some tire patch rubber cement and a good inner tire sealer (I picked up a can of Xtra Seal)
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Reviewed in the United States on March 1, 2024
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Zac Briggs
Boise, US
★★★★★ 5
Saved me from buying a tire
Size: 0.16 x 1.42 ,0.24 x 1.77 ,0.35 x 2.36 Inch, Size: 0.16 x 1.42 ,0.24 x 1.77 ,0.35 x 2.36 Inch
Took our ancient van on a trip to Florida (from IL) and wouldn't you know we picked up some debris in construction. I was able to plug it however the next morning it was flat again. This time I used 2 plugs to and we were able to get home on that. Realizing this wasn't what I wanted my wife driving around and I didn't wanna buy tires for a van with 250k on it I set out to find some internal patches. I pulled the tire off using a harbor freight bead breaker and some motion pro spoons, used vulcanizing Compound and a dremel and patched it right up. Once the tire is off its a really easy process and I just marked my tire and rim to keep the balance close when it went back together. All appears to be working perfectly with no leaks over the past few weeks. This cost way less than a new tire and now I have more for other holes in the future
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Reviewed in the United States on August 2, 2024
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ballpeen
Louisville, US
★★★★★ 5
Better than just a patch
Size: 0.16 x 1.42 ,0.24 x 1.77 ,0.35 x 2.36 Inch
Do what they are suppose to do, easy to use
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Reviewed in the United States on June 2, 2026
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dtep955
Charlottesville, US
★★★★★ 5
worked great for Me
Size: 0.16 x 1.42 ,0.24 x 1.77 ,0.35 x 2.36 Inch
I have only used two patches so far, and they have worked just fine, You do have to have some tools like a buffing wheel and the vulcanizing glue and a roller wheel to make these patches work as they should, but I am happy with these patches, especially since nobody will repair a motorcycle tire, so this is Your only way to fix them.
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