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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
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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 ButtonsIndicators 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'sCooling Convection-cooled Power Consumption 37.5W (1/8 Power Pink Noise @ 4 Ohm)
Typical Current:
Idle: 0.52A
1/8 Power: 1.24ADimensions 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
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.0 ★★★★★
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Product Reviews
★★★★★ 5
Multiple size bags and easy to use.
Set name: 20 Combo
I was pleasantly surprised with how great these were. I chose these for the variety in bag size but I thought I would forever be using the hand pump. Very surprised it worked very quickly and the suction held. Would definitely recommend!
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Reviewed in the United States on May 26, 2026
★★★★★ 5
I highly recommend it
Color: White, Size: D20Plus, Color: White, Size: D20Plus
This is an excellent product and I am very happy with it. The suction power is strong , The automatic station makes cleaning almost hands-free, which is very convenient.
Navigation and mapping are accurate, and it moves around furniture smoothly. It handles daily dust, dirt, and pet hair very well. Setup was quick and the app is easy to use.
Overall, this robot saves a lot of time and works reliably every day. Definitely worth the purchase
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Really nice and affordable vacuum!
Color: White, Size: D20Plus, Color: White, Size: D20Plus
I’ve been looking to upgrade my vacuum robot for a while. I came across this vacuum, it is affordable and comes with the features that I’m looking for. The strong suction, hair detangle brush (critical if you have long hair) and easy mapping. It honestly made daily cleaning so much easier. The suction power is seriously impressive. It picks up dust and crumbs and I love how it auto emptied the dust bin. Also I have hard floor at home and I’m loving the mopping function. I love how I don’t have to vacuum and mop the floor by myself anymore! Would recommend this robot to people that are looking for an affordable option!
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Reviewed in the United States on March 3, 2026
★★★★★ 4
Decent vacuum/mop for the price
Color: Black, Size: D20Plus, Color: Black, Size: D20Plus
We have had this vacuum for a couple of months now and can now give it an honest review.
The good: cleans well, good suction power, durable, manages changes in floor height fairly well, attractive (for a robot vacuum), programmable, great mapping
The bad: noisy, muffled voices, cumbersome to program initially, app is not the most user-friendly, does not like rugs with a higher nap.
Some tips:
1) If you have pets, be cautious of the cleaning solution. Make sure it's pet safe.
2) For pets and children- Remember to pick up any toys before the cleaning cycle begins. The vacuum will try to eat smaller, flat or string toys, and you will end up with a wrapped brush notification.
3) When mapping for the first time, remember to close doors to any rooms or exterior areas you do not want vacuumed or mopped.
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Reviewed in the United States on April 2, 2026
★★★★★ 5
Excellent for vacuuming with a great app
Color: White, Size: D20Plus
This thing is just awesome. I gave her name and some googly eyes, and now she is my official cleaning lady. Does a great job with dog hair which was the main reason for the purpose. I was vacuuming all the time. I have hard floors and 3 dogs one of which is a golden retriever that sheds like crazy. The D20 does really great getting up the pet hair along with other stuff in the floor. I have a couple area rugs as well as thick mats in front of the front and back doors, and she does great on both. I definitely make sure to get up any cables or little things like door stops as she will get caught up from time to time. The app works great and does a good job of sending alerts when there is an issue. It lets you know if it’s hung up on something, stick on an edge and if the cleaners are tangled up underneath along with other things. It’s really easy to flip over and take off the brushes to clean them out and untangle them, and easy to put it all back together. You can also schedule her to clean any time of day / night and customize how it cleans certain areas. I prefer to let her run late at night while me and the dogs are sleeping, and she gets the house done in about 90 minutes and covers a lot of ground. She’s also surprisingly quiet for as much as she is picking up. If I’m already awake, I can hear her start to roll around upstairs. But I’ve never been woken up by her, nor have my dogs. I have never used the mop feature as I bought it only for the vacuuming. From what I’ve read it seems there are better options for mopping. But as far as vacuuming goes I am super happy with her! I was vacuuming 3-4 times a week and would usually mop every other week, if ai could get away with it. Now I vacuum and mop once every two weeks, and Dreame does a wonderful job keeping the place clean in between my bi-weekly cleanings. The D20 was a great purchase and a major time and energy saver for me!
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Reviewed in the United States on January 9, 2026