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Roswell RMA 12" RMA Series 12" marine subwoofer with dual 4-ohm voice coils (Black grille)

Item # 3511811

Since their founding in 1998, Roswell has pioneered new innovations in boating and water sports, so you know...

Since their founding in 1998, Roswell has pioneered new innovations in boating and water sports, so you know...

Item # 3511811

Every order includes

  • Free lifetime tech support
  • 60-day price-drop protection
  • 60-day returns
Low stock
$621.90 each

Get questions answered fast & free

Expert help 400+ hours training Virginia-based

About the Roswell RMA 12"

Bob Bihlmayer

Product highlights:

  • 12" marine subwoofer
  • dual 4-ohm voice coils
  • suitable for infinite baffle applications and sealed or ported enclosures
  • power handling: 500 watts RMS (1000 watts peak)
  • frequency response: 32-250 Hz
  • sensitivity: 88 dB
  • cutout diameter: 11.2"
  • mounting depth: 6.38"
  • warranty: 2 years
  • MFR # C920-1811
  • Item # 3511811

What's in the box:

More details on the Roswell RMA 12"

Pat M.

Features & specs

Features and Specs
Size 12-inch
Impedance (Ohms) 2, 8
Cone Material Poly
Surround Material Rubber
Basket Material Centrex Plastic
Grille Black plastic
Free-Air Yes
Dual Voice Coil Yes
Sensitivity 88 dB at 1 watt
Frequency Response 32 - 250 Hz
Max RMS Power Handling 500
Peak Power Handling (Watts) 1000
Top Mount Depth (inches) 6 3/8
Bottom Mount Depth (inches) N/A
Cutout Diameter or Length (inches) 11 1/4
Frame Width 12.84
Frame Length 12.84
Vas (liters) 41.3
Fs (Hz) 32
Qts 0.77
Xmax (millimeters) 12
Parts Warranty 2 Years
Labor Warranty 2 Years
Box Requirements
Ideal Sealed Box Volume (cubic feet) N/A
Minimum Sealed Box Volume (cubic feet) N/A
Maximum Sealed Box Volume (cubic feet) N/A
Ideal Ported Box Volume (cubic feet) 1.63
Minimum Ported Box Volume (cubic feet) 1.5
Maximum Ported Box Volume (cubic feet) 2.5
Port diameter (inches) 4
Port length (inches) 7.625

Product Research

Features

Impedance Switch: A switch on the input terminal, behind a panel secured by two screws, allows you to change the subwoofer's impedance between 2Ω and 8Ω, internally changing between wiring the dual 4Ω voice coils in parallel and in series. (The connected amplifier should be off when changing the impedance.) The power handling is the same for either setting; 500 watts RMS/1,000 watts peak.

Wire Terminal: The set screw terminals will accept up to 10-gauge speaker wire.

Klippel Verified: The Klippel distortion analyzer, a device that uses a laser and sophisticated software to do large-scale analysis of drivers in motion, lets Roswell optimize the woofer's motor structure, voice coil alignment, and suspension to yield the best possible performance.

Basket And Grille: The basket and grille are Centrex plastic; the basket encloses the woofer's motor system to prevent corrosion.

Infinite-Baffle Operation: The R1 subwoofer is designed for infinite baffle operation so that it can be installed in a variety of locations, without the need for a dedicated enclosure. If a sealed enclosure is used, Roswell recommends it be as large as is practical. Three ported enclosure options are also listed in the manual:

  • 1.5 ft³ using a 4" diameter x 10⅞" long port, resulting in a tuning frequency of 40 Hz
  • 2.0 ft³ using a 4" diameter x 7⅝" long port, resulting in a tuning frequency of 40 Hz
  • 2.5 ft³ using a 4" diameter x 7⅝" long port, resulting in a tuning frequency of 35 Hz

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Roswell RMA 12
$621.90 each
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