RWB90B Black 4-Pack + DBM45 Marine Amplifier Bundle
1
/
of
23
Rockville
RWB90B Black 4-Pack + DBM45 Marine Amplifier Bundle
RWB90B Black 4-Pack + DBM45 Marine Amplifier Bundle
8" Swivel Tower Speakers, 4-Pack, 4-Ch Amp, 4 AWG Kit
Free Shipping
Regular price
$469.85
Sale price
$469.85
Regular price
$0.00
Unit price
/
per
Features
- Four 8" black swivel tower speakers
- High-efficiency two-way design
- 500W RMS 4-channel marine amplifier
- Waterproof 4 AWG wiring kit
- Stainless hardware, sealed terminals
Couldn't load pickup availability
30-Day Money-Back Guarantee
Fast & Free Shipping
Buy Now, Pay Later
1-Year Warranty
What's Included in the box
- (2) Pairs RWB90B 8" Black Tower Speakers
- DBM45 4-Channel Marine Amplifier
- RMWK4 Marine Amp Wiring Kit
SKU: SKU: (2) RWB90B+DBM45+RMWK4 v2
View full details






















Product Description
Experience expansive, articulate sound with four 8" tower speakers powered by a dyno-rated 4-channel amplifier. The larger woofers provide deeper lows and stronger throw, reaching riders with clarity. Fully marinized build resists UV and salt, while a waterproof 4 AWG kit supports a robust, tidy installation. A refined solution for tow boats and sport rigs seeking projection and precision.
This Bundle Includes

RWB90B
RWB90 Marine Wakeboard Speakers offer 200W RMS power, marine-grade durability, and 360° swivel mounting. Designed for boats, Jeeps, and ATVs, they deliver clear, powerful sound and withstand the harshest elements. Enjoy premium audio performance and flexible installation for any adventure, on water or off-road.
Learn More

DBM45
The DBM45 4-channel marine amplifier delivers 2,000W peak and 500W RMS, combining waterproof construction with advanced crossover controls. Designed for boats of all sizes, it adapts to subwoofers, full-range, or midrange speakers, ensuring powerful, clear sound and lasting performance—plus a PA microphone and mounting kit for added versatility.
Learn More

RMWK4 V2
The RMWK4 V2 marine amplifier wiring kit delivers premium power and signal transfer with 4 AWG cables, waterproof fuse holders, and corrosion-resistant terminals. Designed for marine durability and easy installation, it’s the complete solution for achieving powerful, reliable audio on any boat or outdoor system.
Learn More
Features
Expansive, Clear Output
Two-way 8" drivers deliver fuller bass and crisp highs across open water.
Certified Multi-Channel Power
Dyno-tested amplification supplies even, low-distortion current to all speakers.
Rotatable Aiming
360° swivel brackets let you direct sound forward for riders or back to the lounge.
Marine-Ready Durability
Sealed terminals and stainless fasteners defend against corrosion and moisture.
Installation Assurance
4 AWG marine kit delivers consistent power with cleaner cable management.

Technical Specifications
- Type Marine tower speaker and amplifier bundle
- Speaker RMS Power 200 W per speaker
- Amplifier RMS Power 500 W (4 ch total)
- Impedance 4 Ω (speakers)
- Frequency Response 60 Hz – 20 kHz (speakers)
- Wiring Kit 4 AWG waterproof marine
- Weight Varies by installation
- Dimensions Amp 9" x 2.4" x 15.1"