Your cart
Contact us
Close contact box
Connect ID #
261 463 499 3
Connect ID #
261 463 499 3
All finished with your chat session?

We’ll email you a transcript of this conversation for your records.

All of our representatives are
currently chatting with other customers.

Please enter your name.  
Please enter a valid email address. Why is this required?

For Tech Support, call 1-888-292-2575

Thank you, !
Our conversation will be emailed to
Chat Advisor Image

Your Advisor,

More about me
Please enter a question  
Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  

Please enter a message  

Calls may be recorded for training and quality control purposes.

We are located in Virginia USA.

Roswell RMA 10" Sub/Amp Package

Includes Roswell's RMA 10" subwoofer and R1 550.2 amplifier

Item # 3512552

Finding the right amp for your sub can be one of the more stressful parts of building a rockin' marine audio system.

Finding the right amp for your sub can be one of the more stressful parts of building a rockin' marine audio system.

Item # 3512552

Ships free today

Low stock
$680.40 each

Other options

60-day returns

If you don't love it, send it back.

Need an expert?

Our Advisors know their stuff and love to help.

Since 1974

Years of experience making people happy.

About the Roswell RMA 10" Sub/Amp Package

Take the stress out of sub shopping

Finding the right amp for your sub can be one of the more stressful parts of building a rockin' marine audio system. So the good folks at Roswell did it for you. If you're looking for better bass on your boat, Roswell's R1 550.2 marine amplifier and the RMA sub make a perfect pair.

Take the stress out of sub shopping

Finding the right amp for your sub can be one of the more stressful parts of building a rockin' marine audio system. So the good folks at Roswell did it for you. If you're looking for better bass on your boat, Roswell's R1 550.2 marine amplifier and the RMA sub make a perfect pair.

Brilliant bass for your boat

Roswell's RMA Series 10" marine subwoofer is designed to work in sealed and ported enclosures, along with infinite baffle applications. With up to 250 watts RMS power handling, you'll hear the low notes like never before. The marine-grade plastic housing provides the extreme salt and UV resistance needed to stand up to the marine environment, while custom-machined terminals ensure solid connections.

The included plastic grille's press-fit design hides the installation hardware for a custom look. And with just over 5" of mounting depth, the RMA sub is easy to fit into almost any application.

The power to perform

Roswell's R1 Series 550.2  two-channel amplifier cranks out plenty of power to the sub, and will easily handle a second RMA 10" sub added later. It sports a full complement of controls, including a low-pass filter, variable phase adjustment, a variable subsonic filter, and a potent bass boost, so you can tune your system to perfection. This Class D amp runs cool, uses less power than other amp designs, and features differential inputs that filter out the noise generated by your boat's electrical system. Roswell designed this amplifier to endure the extremes of life on the water, so salt, dust, fog, and UV rays won't keep it from doing its job for years to come.

The Roswell story

What began as a homespun start-up out of a family garage in Canada has now become a go-to name in marine audio worldwide. Over two decades later, the folks at Roswell are just as passionate about audio solutions for boating and powersports as when they began. Choosing Roswell audio gear for your boat ensures you'll enjoy impressive sound, sleek design, and superior build quality every time you venture onto the water.


Product highlights:

  • 10" sub/amp package for marine applications
RMA Series subwoofer
  • 10" 4-ohm marine subwoofer
  • suitable for infinite baffle applications and sealed or ported enclosures
  • power handling: 250 watts RMS (500 watts peak)
  • frequency response: 35-300 Hz
  • sensitivity: 88 dB
  • cutout diameter: 9:25"
  • mounting depth: 5.08"
  • warranty: 1 year
Roswell 550.2 amplifier
  • marine-rated 2-channel amp
  • 165 watts RMS x 2 (550 watts x 1 bridged at 4 ohms)
  • efficient Class D design
  • frequency response: 10-25,000 Hz
  • variable low- and high-pass filters (30-300 Hz, 12 dB/octave)
  • bass boost ((0-18 dB at 45Hz)
  • conformal coated circuit boards
  • dimensions: 11-1/8"W x 1-15/16"H x 7-1/16"D
  • wiring and hardware not included
  • 4-gauge power and ground leads recommended
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # C920-2552

What's in the box:

  • This package contains 2 individually boxed items:
  • R1 Amplifier:
  • 2-Channel marine amplifier
  • Four 14mm screws
  • 3 Allen keys (4mm / 3mm / 2mm)
  • Barcode sticker with model & serial numbers
  • RMA Subwoofer:
  • 10" Subwoofer driver (black)
  • Spoke-style grille
  • Eight 2" screws
  • Subwoofer Assembly Instructions

Customer reviews

We don't have any reviews, yet.
Submit a review and then enter to win a $350 gift card.
Be the first to review this product

Loading reviews...

Thanks for submitting your review

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Verified customer (What's this?)
Verified employee purchase (What's this?)



Crutchfield response

<< >>

More details on the Roswell RMA 10" Sub/Amp Package

Pat M.

Product Research



System Overview: The Roswell RMA 10" Subwoofer Package contains one 10" RMA marine subwoofer with a spoke-style grille (black), and an R1 550.2 marine amplifier capable of outputting 550W bridged.


RMA 10": The Roswell RMA 10" marine subwoofer is a versatile subwoofer that can be mounted in a ported enclosure or in an infinite baffle configuration, giving you a wide range of installation options (enclosure sold separately). The 4Ω marine subwoofer can handle up to 250W RMS and provide deep bass extension down to 35Hz. It features a durable marine-grade plastic housing that requires just over 5" of mounting depth. The two wire terminals can accept speaker wire up to 10-gauge in size, and are secured with knurled knobs that can be hand-tightened without any tools.

Klippel Verified: The RMA 10" subwoofer has been Klippel tested and certified to guarantee its performance.

Ported Enclosure Specifications:

Box Volume Port Diameter Port Length F-3
1.0 cu./ft. 4.0" 17.75" 40Hz
1.5 cu./ft. 10.75" 35Hz
2.0 cu./ft. 10.75" 35Hz


Marine Amplifier: The Roswell R1 550.2 2-channel amplifier is designed for the marine environment. It features a heavy-duty chassis with a removable cover for the controls, fully conformal-coated PCBs, and nickel-plated marine-grade wire terminals.

Class D Amplification: The R1 550.2 features state-of-the-art Class D amplification which provides ample power in a small chassis. The amp's power output is as follows:

  • 165 watts RMS x 2 @ 4 Ohms
  • 275 watts RMS x 2 @ 2 Ohms
  • 550 watts RMS x 1 @ 4 Ohms bridged

Control Panel: The top-mounted control panel is protected by a cover to help keep the controls dry, and to prevent unwanted adjustments. The cover screws can be removed with the provided 3mm Allen wrench. The rotary controls and recessed slide switches require the use of a narrow flat-head screwdriver to make adjustments.

  • Differential Input (On/Off): This setting can provide better resistance to electromagnetic interference (EMI) and help eliminate any signal noise.
  • Crossovers: A 3-way switch that lets you set the crossover for low-pass, high-pass, or full-range operation. The rotary controls lets you set the low-pass or high-pass frequency between 30Hz and 300Hz. The crossover has a 12dB/octave slope.
  • Sensitivity: This control lets you match the amplifier input to the output of source unit. The input sensitivity of the amp ranges from 0.2V (Min) to 10.0V (Max).
  • Subsonic: Lets you adjust the frequency of the built-in subsonic filter, with a range of 10Hz - 35Hz.
  • Phase: A variable control can shift the signal phase, with a range of 0˚ - 180˚.
  • Boost: Provides a 0 - 18dB boost @45Hz.
  • Power/Protect LED: Lights when the amplifier is fully activated, and will flash red when a fault in the speaker wiring or internally is detected.
  • Clip LED: Lights if the input signal is too high. The sensitivity dial should be turned down to where the Clip indicator doesn't light.

Connections: The Roswell R1 500.2's wiring connections are on one side of the amplifier for a clean installation. Each wire connection is held with a set-screw connection (Allen keys provided). The connections are as follows:

  • Power/Ground: The power and ground connections feature set-screw terminals that will accept up to 4-gauge wire (recommended).
  • Remote Turn-on: The Remote Turn-on connection is a set-screw terminal that will accept up to 14-gauge wire.
  • Speaker Outputs: The two sets of speaker output terminals accept up to 12-gauge speaker wire.
  • Inputs: The amp features one pair of RCA input jacks for connecting the source unit.
  • Outputs: Two RCA jacks can be used to pass the input signal back out to additional amplifiers.
  • Fuses: Two 25A

Stackable Mounting: The R1 500.2 amplifier's unique design allows it to be stack-mounted using the optional Roswell R1 Amp Spacers (sold separately). The Amp Spacers allow multiple R1 500.2 amps to be mounted on top of each other, taking up less horizontal space. The billet aluminum spacers allow ample room for airflow between each amp, and are designed to withstand the marine environment.



  • Width: 11.12"
  • Height: 2.0"
  • Depth: 7.10"


  • Outer Diameter: 10.81"
  • Cutout Diameter: 9.19"
  • Mounting Depth: 5.10"
  • Mounting Height:
    •  w/ Grille: 1.42"
    • w/o Grille: 0.77"
  • Overall Height:
    • w/ Grille: 6.52"
    • w/o Grille: 5.87"

Loading accessories...

Customer Q&A

Loading articles...

Compare the sound