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JVC

JVC KS-DR1004D Marine Amplifier & Rockville RWB90W Speakers

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Elevate Your Audio Experience on the WaterThe JVC KS-DR1004D 4-Channel Marine Amplifier is designed to deliver powerful audio performance in marine and off-road environments. This 400-watt amplifier is bundled with a pair of Rockville RWB90W 8" White 2-Way Marine Wakeboard Tower Speakers, offerin...

$377.60*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

Elevate Your Audio Experience on the Water

The JVC KS-DR1004D 4-Channel Marine Amplifier is designed to deliver powerful audio performance in marine and off-road environments. This 400-watt amplifier is bundled with a pair of Rockville RWB90W 8" White 2-Way Marine Wakeboard Tower Speakers, offering a complete audio solution for Polaris RZR/ATV/UTV/Cart. These speakers are fully marinized against salt and fresh water conditions, ensuring durability and long-lasting performance.

  • Amplifier: JVC KS-DR1004D 4-Channel Marine Amplifier
  • Power: 400 Watts
  • Speakers: Pair Rockville RWB90W 8" White 2-Way Marine Wakeboard Tower Speakers
  • Power Handling (Speakers): 600 Watts (300 Watts per Speaker)
  • Frequency Response (Speakers): 60 – 20,000 Hz
  • Water Resistance: Fully Marinized
  • Mounting: Adjustable Nylon Mounting Bracket with Stainless Steel Hardware

Key Features

Package Includes: (1) JVC KS-DR1004D 400 Watt 4-Channel Marine Amplifier For Polaris RZR/ATV/UTV/Cart. (2) Pair Rockville RWB90W White 8" 300w Marine Wakeboard 360° Swivel Tower Speakers. Amplifier. Maximum Power Output 400W. RMS Power Output (4 ohm) [ 1% THD 14.4V] 45W x 4 (20 - 20,000Hz). RMS Power Output (2 ohm) [ 1% THD 14.4V] 45W x 4 (1,000Hz). RMS Power Output (Bridged 4 ohm) [ 1% THD 14.4V] 90W x 2 (1,000Hz). Class Class-D

Signal-to-Noise Ratio (reference: 1W into 4 ohms), CEA-2006 Compliant > 82dB. Load Impedance. Load Impedance Allowance 2 - 8 ohms. HPF 50Hz - 200Hz (-12dB/oct). LPF 50Hz - 200Hz (-12dB/oct). RCA Input Ach L/R, Bch L/R. High Level Input (Speaker Level Input) Yes. High Level Input Auto Power Control (Signal Sensing Turn On) Yes. Input Sensitivity 0.2 - 5V. Dimensions (W x H x D) 145 x 45 x 99 mm (5-11/16" x 1-3/4" x 3-7/8"). Weight 0.7kg (1.5lbs).

No exaggerated power ratings : These speakers are rated with true world RMS ratings. No bootleg or exaggerated power ratings like other brands. These speakers are 200 watts RMS and 300 watts peak. (200 watts RMS is equal to about 500 watts rated by other brands)

Marine grade components and materials: these speakers are truly marine grade. They will not get damaged by water, salt water, or moisture. In addition the terminals (which are normally the first part of a marine speakers that gets damaged by water are made out of stainless steel and they are completely rustproof. There is also an additional waterproof coating cut completely protect the speakers.

These can withstand all elements on the water for a lifetime of worry free use. The mounting screws are longer than other versions we carry to accommodate thicker mounting bars. In addition to wakeboard tower's on boats, we tested these to be perfect for installing in Jeep Cherokee vehicles and even ATV's.

Specifications

Brand
JVC
Model
KS-DR1004D Amplifier
Amplifier Type
Class-D
Maximum Power Output
400W
RMS Power Output (4 ohm)
45W x 4 (20 - 20,000Hz)
RMS Power Output (2 ohm)
45W x 4 (1,000Hz)
RMS Power Output (Bridged 4 ohm)
90W x 2 (1,000Hz)
Signal-to-Noise Ratio (CEA-2006 Compliant)
> 82dB
Load Impedance Allowance
2 - 8 ohms
High-Pass Filter (HPF)
50Hz - 200Hz (-12dB/oct)
Low-Pass Filter (LPF)
50Hz - 200Hz (-12dB/oct)
Input Sensitivity
0.2 - 5V
RCA Input
Ach L/R, Bch L/R
High Level Input
Yes
High Level Input Auto Power Control
Yes (Signal Sensing Turn On)
Amplifier Dimensions (W x H x D)
145 x 45 x 99 mm (5-11/16" x 1-3/4" x 3-7/8")
Amplifier Weight
0.7kg (1.5lbs)
Included Speakers
2 Pair Rockville RWB90W White 8" Marine Wakeboard 360° Swivel Tower Speakers
Speaker Power Handling (RMS)
200 watts
Speaker Power Handling (Peak)
300 watts
Speaker Features
Marine grade components, Stainless steel rustproof terminals, Waterproof coating, Longer mounting screws, 360° Swivel

Pros & Cons

👍 Pros

  • Provides a robust 400W maximum power output and 45W x 4 RMS at 4 ohms, ensuring powerful audio performance.
  • Includes two pairs of Rockville RWB90W White 8" 300W Marine Wakeboard 360° Swivel Tower Speakers, ready for outdoor installation.
  • Features true marine-grade components and materials, offering superior resistance to water, salt water, and moisture for enhanced durability.
  • The speakers come with stainless steel, rustproof terminals and an additional waterproof coating, protecting against environmental damage.
  • Designed with an auto power control (signal sensing turn-on) feature for high-level input, simplifying installation and operation.
  • The speakers feature a 360° swivel tower design, allowing for flexible direction of sound in various outdoor settings like ATVs or boats.

👎 Cons

  • The amplifier's RMS power output at 2 ohms (45W x 4) is the same as at 4 ohms, indicating it does not gain power by halfing the impedance.
  • The package does not specify any form of digital audio input, relying on RCA and high-level inputs, which might be a limitation for some modern head units.
  • The HPF and LPF are fixed at -12dB/oct, which may not offer the granular control some advanced audio enthusiasts desire for sound shaping.
  • While "true marine grade," specific IP ratings for water and dust resistance are not explicitly stated for either the amplifier or speakers.
  • The amplifier's weight of 0.7kg (1.5lbs) is light, but the speakers' individual weight is not provided, making total system weight assessment difficult.

Frequently Asked Questions

This package includes a JVC KS-DR1004D 4-Channel Marine Amplifier and two Rockville RWB90W White 8" Marine Wakeboard 360° Swivel Tower Speakers.
The amplifier has a maximum power output of 400W and delivers 45W x 4 RMS into 4 ohms (20-20,000Hz) or 90W x 2 bridged into 4 ohms.
Yes, these speakers are built with marine-grade components and materials, designed to withstand water, saltwater, and moisture without damage, including rustproof stainless steel terminals.
In addition to wakeboard towers on boats, these speakers have been tested and found suitable for installation in Jeep Cherokee vehicles and ATVs.
The speakers are rated for 200 watts RMS and 300 watts peak, providing true world RMS ratings for reliable performance.
The amplifier measures 145 x 45 x 99 mm (5-11/16" x 1-3/4" x 3-7/8") and weighs 0.7kg (1.5lbs), making it compact and relatively lightweight for installation.

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