---
product_id: 364078250
title: "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"
brand: "pyle"
price: "486 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Pyle"
url: https://www.desertcart.pl/products/364078250-hydra-marine-400w-4-channel-amplifier-waterproof-with-dual-mosfet
store_origin: PL
region: Poland
---

# 400W max power output IP-01 waterproof marine grade Thermal & short circuit protection 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

**Brand:** pyle
**Price:** 486 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Ride the wave of power and precision sound wherever you go!

## Quick Answers

- **What is this?** 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 by pyle
- **How much does it cost?** 486 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/364078250-hydra-marine-400w-4-channel-amplifier-waterproof-with-dual-mosfet)

## Best For

- pyle enthusiasts

## Why This Product

- Trusted pyle brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power Your Adventure:** 400W of crystal-clear, high-fidelity sound across 4 channels to elevate every boat or vehicle ride.
- • **Seamless Connectivity:** Universal RCA inputs plus high-level terminal compatibility for effortless integration with any head unit.
- • **Precision Sound Control:** Dual adjustable gain controls let you fine-tune audio levels for the perfect immersive experience.
- • **Smart Protection System:** Heavy-duty aluminum heatsink with thermal overload and short circuit safeguards keeps your gear safe and sound.
- • **Built to Brave the Elements:** Marine-grade IP-01 waterproof design with corrosion-resistant gold-plated terminals ensures durability on water and road.

## Overview

The Pyle Hydra Marine 400W 4-Channel Amplifier (PLMRA402) delivers robust 400-watt output with dual MOSFET power supply, engineered for marine and vehicle audio systems. Featuring waterproof IP-01 rating, gold-plated corrosion-resistant terminals, thermal and short circuit protection, and versatile RCA/high-level inputs, it offers reliable, high-quality sound in a compact, durable design.

## Description

Buy 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: Marine Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Need a small car amp? Bingo. - None of the cheap car audio amps were below 70$. Low and behold this little guy just popped out of no where. In the 20$ range... huh? Yea i thought so too. Got it, installed, set crossovers to my speakers ranges. Sounds bichin'. Other reviews say its not 400 watts... maybe? But i couldnt get my stereo to 27 of 65 w/out clipping. Just terrible. With the amps gains set to jist the 1st notch - Im able to get to 57 w/out clipping, and thats way loud. Just need some tweets now. Great product I believe (havent had more than a few days, time will tell) - but great product thus far. Cheap Quality w/ a "marine" stamp on it.. for boats i guess, works great in a car.
Review: Good amp for motorcycle due to its size - Good little amp which fits in the changer bay on my 2004 Honda Goldwing and has good sound at low to mid volumes. With it wired correctly with heavy cables (which must be cut down to fit under the spades), this amp works well at low to mid volumes, but cuts out when turning up the volume, even with input gains set correctly (even all the way down where there is little to no amplification). Immediately reducing the volume will restore the sound.

## Features

- PREMIUM 4 CHANNEL AMPLIFIER: Pyle’s 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. It’s constructed with gold-plated speaker output terminal connectors as well to combat corrosion with long term use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |
| Number of Channels | 4 |
| Operating Temperature | 85 Degrees Celsius |
| Output Power | 400 Watts |
| Package Type Name | box |
| Specification Met | Ip-01 |
| Material | Metal |
| UPC | 842893140940 |
| Product Dimensions | 9 x 7.9 x 2 inches |
| Item Weight | 3.36 pounds |
| ASIN | B09BD65KJ9 |
| Item model number | PLMRA402 |
| Date First Available | July 28, 2021 |

## Product Details

- **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

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/71TpNTjPknL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Need a small car amp? Bingo.
*by E***N on January 17, 2024*

None of the cheap car audio amps were below 70$. Low and behold this little guy just popped out of no where. In the 20$ range... huh? Yea i thought so too. Got it, installed, set crossovers to my speakers ranges. Sounds bichin'. Other reviews say its not 400 watts... maybe? But i couldnt get my stereo to 27 of 65 w/out clipping. Just terrible. With the amps gains set to jist the 1st notch - Im able to get to 57 w/out clipping, and thats way loud. Just need some tweets now. Great product I believe (havent had more than a few days, time will tell) - but great product thus far. Cheap Quality w/ a "marine" stamp on it.. for boats i guess, works great in a car.

### ⭐⭐⭐⭐⭐ Good amp for motorcycle due to its size
*by J***T on February 17, 2022*

Good little amp which fits in the changer bay on my 2004 Honda Goldwing and has good sound at low to mid volumes. With it wired correctly with heavy cables (which must be cut down to fit under the spades), this amp works well at low to mid volumes, but cuts out when turning up the volume, even with input gains set correctly (even all the way down where there is little to no amplification). Immediately reducing the volume will restore the sound.

### ⭐ Terrible Amplifier. Does not filter out line noise like a 20 year old amplifier does.
*by D***R on June 2, 2025*

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....

## Frequently Bought Together

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-27*