Space limitations can make it difficult to add bass to an R/V's sound system. Concertone created the SW-BOX4 to address that issue and provide your R/V with the low frequencies that make a 5.1 surround system complete. The ported MDF enclosure measures just under 4-5/8" deep, allowing this sub to fit in almost any location. Concertone designed the 8" woofer to work perfectly with multi-channel amp built into their DVD receivers.

If you're mounting this enclosure in a high-traffic area, it's a good idea to purchase the white grille to protect the sub.

Product Highlights:

  • ported enclosure with one 8" subwoofer
  • 4-ohm total impedance
  • power handling: 50 watts RMS (75 watts peak power)
  • frequency response: 55-3,000 Hz
  • sensitivity: 89 dB
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research

What's in the box?

  • SW-BOX4 Enclosure with 8" Subwoofer installed

Product Research


Overview: The Concertone SW-BOX4 is an 8 inch subwoofer installed in a ported enclosure, designed to mount in the ceiling or wall of your RV. It can be covered using the SW-Grill3 speaker grill. The subwoofer is specifically engineered to work with all Concertone radios that have a powered subwoofer output. The subwoofer cone is made of a special coated paper and has a foam surround to produce rich bass.


  • Width: 14.165"
  • Height: 15.5"
  • Depth: 4.528"


  • Frequency Response: 55 Hz to 3 kHz
  • Recommended Power: 50 watts RMS (75 watts max)
  • Impedance:
  • Sensitivity: 89 dB

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Concertone SW-BOX4 Reviews

Average Customer Review:

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Concertone SW-BOX4

Written By Gary, Iowa on Wednesday, January 23, 2013

Crutchfield Customer Review (What's this?)

Our 5th wheel came with a Genesis stereo and I would call cheap sound. The system can support the Concertone SW-BOX4 subwoffer which I added. The subwoffer added the base to the system which it was missing. The overall size was a concern with the space which I had to put the sub.

Get everything you’ll need to enjoy your new Concertone SW-BOX4

You'll need speaker wire to connect your speakers to your amp.
The right tools will help keep your installation simple and clean.
T-Spec 16-gauge Speaker Wire

T-Spec 16-gauge Speaker Wire

Black/white jacket — priced per foot

Item #: 120SW16WB1


T-Spec 12-gauge Speaker Wire

T-Spec 12-gauge Speaker Wire

Black/white jacket — priced per foot

Item #: 120SW12WB1


Stinger PRO Series Speaker Wire

Stinger PRO Series Speaker Wire

Priced per foot (16 Gauge)

Item #: 541SPW516B


Pro.Fit Wire Worm

Pro.Fit Wire Worm

Installation tool helps route wiring through tight spaces

Item #: 042DM4533


Add to Cart
Bojo Trim Panel Tools

Bojo Trim Panel Tools

Set of 6 pry tools — helps remove interior and exterior trim and door panels

Item #: 126CR6NGL


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S&G Wire Cutter/Stripper Tool

S&G Wire Cutter/Stripper Tool

Cuts and strips 12- to 22-gauge wire

Item #: 18119100


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Bojo Trim Panel Tools

Bojo Trim Panel Tools

Set of 6 pry tools — helps remove interior and exterior trim and door panels

Item #: 126CR6LNGL


Add to Cart
Posi-Products™ Car Stereo Connectors

Posi-Products™ Car Stereo Connectors

16 connectors for installing a new car stereo

Item #: 669PP500