Pyle Hydra Marine 400W 4-Channel Amplifier - Waterproof with Dual MOSFET Power Supply - GAIN level Controls - RCA Input - LED Indicator - Compact Design for Boat/Vehicle Audio - PLMRA402
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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 10 left in stock, order soon!
Arrives
Jul 13 – Jul 17
Style: Marine Amplifier Elite
Features
- PREMIUM 4 CHANNEL AMPLIFIER: Pyles PLMRA400 is engineered as a 4 Channel marine amplifier that allows high quality stereo reproduction from source. This will power up your speaker and be universally compatible with a variety of head units.
- RCA STEREO INPUT: For an easier use of this hydra marine amplifier, it comes with premium RCA inputs. If your marine receiver lacks RCA output jacks, you can connect speaker output leads to the high-level terminal inputs.
- SHORT PROTECTION: Built with a heavy duty Aluminum Alloy heatsink, thermal overload speaker short protection and LED light indicator. These are to protect the amp and your vehicle's electrical system from short circuit conditions.
- POWERFUL 400 WATT: This amplifier is powerful with its 100 WATT x 4 max or 400 WATT and dual MOFSET power supply. Comes with dual adjustable input GAIN level controls between 1-300mV and 4 or 8 Ohm speaker impedance.
- MARINE GRADE: With its Marine rating of IP-01, it is waterproof ready. Its constructed with gold-plated speaker output terminal connectors as well to combat corrosion with long term use.
Item dimensions L x W x H: 9 x 7.9 x 2 inches
Voltage: 12 Volts
Manufacturer: Pyle
Mounting Type: Surface Mount
Brand: Pyle
Voltage: 12 Volts
Mounting Type: Surface Mount
Number of Channels: 4
Operating Temperature: 85 Degrees Celsius
Output Power: 400 Watts
Package Type Name: box
Maximum Output Power: 400 watts
Item Dimensions: 9 x 7.9 x 2 inches
Material Type: Metal
Specification Met: Ip-01
Manufacturer: Pyle
Model: PLMRA402
Brand Name: Pyle
Warranty Description: Manufacturer Warranty
UPC: 842893140940
Part Number: PLMRA402
Item Type Name: 4-Ch. Elite Series Marine Amplifier
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 13 – Jul 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Little amp just works. It comes with high level inputs. Easy to install. I’ve splashed it with water from the hose while cleaning the boat and it hasn’t seemed to affect it. Is it 100 watts per channel? Idk. I have 3 skar 6.5s and they sound amazing with it, with amp gain all the way up they are still asking for more. . Plus two Rockville wake tower 6.5s and even though they are rated at 250 watts per unit they don’t like it with the amp the way up ,currently their channels are set to half. Two of the skars share a channel. Will see how it hold up this summer but as for now It gets 5 stars.
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Reviewed in the United States on May 8, 2026 by Jordan
I was a little nervous about buying it because of the complaints about alternator noise. I took a chance and so far, it works great and no alternator noise. I power four KICKER 6.5” 2 way speakers. Good little amp.
Reviewed in the United States on March 30, 2026 by BEAUTIFUL
Hooked this up to replace my 20yr old marine audio 120w 2 channel amp. When I hooked it up worked fine until I started the engines. Loud whine came through the stereo as the suzuki 300 were running. Also whine was heard when using underwater lights. It was so bad could not keep radio on, had to shut it down. Hooked back up old amplifier works perfectly. This amp is a pyle of @#$#. I waited too long to hook it up or I would return it. Guess I'm stuck with it now....
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Reviewed in the United States on June 2, 2025 by Dan steiner
Works as it should love it..
Reviewed in the United States on March 18, 2026 by Luis Rosado
Pretty decent little amp for the money. Only problem I had (maybe my fault for poor ventilation) was the amp would cut out or lower the output volume after use sometimes. I’m assuming it was getting hot in my front deck storage of my boat. If you didn’t need something super loud this would be a pretty good amp and it’s fairly compact.
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Reviewed in the United States on December 16, 2025 by Nathan W.
I’ve had this amplifier for a good couple of months now it hasn’t given me any problems. I’ve blew a couple of fuses in my car but that thing never gave up. I’m running 12 gauge wiring same as the speaker wire and power wire ground wire ACC wire and it’s still output wires don’t get hot. It also doesn’t get hot. I wouldn’t recommend for a boat as it is cheap but for the money, the audio quality is great and as long as you keep it in a car, it will do just fine. I have three amplifiers and I can’t tell you how much work I’ve put into my car if you’re looking for something simple to use that’s not complicated do this amp you can run it off the original head unit wire
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Reviewed in the United States on August 10, 2024 Reviewed in the United States on August 10, 2024 by Tay
Loud but can't get rid of the alternator noise I wired it every way I can and always has alternator noise coming through the speakers brought it to a audio shop and they were unable to get the alternator noise to stop I've installed many amps and never had a issue contacted pyle for help and got no response if your system don't have a alternator or any battery charger it is perfect but if it does don't get this one I thought it was the amp causing it at first so I got a replacement and it does the same thing I recommended but at the same time I don't
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Reviewed in the United States on March 8, 2026 by Rebecca Lynn Hermel
HUGE step up from factory with simple high end speakers, same size as factory (6” I think) Bought this and new modern stereo. We jam now on the lake. Love Pyle brand regarding performance and reliability for small budgets
Reviewed in the United States on March 11, 2026 by Daniel R. Keith