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

Concertone SW-BOX4 Reviews

Average Customer Review:

1 reviews
Review this product
Great Gear Giveaway

Submit a review and then enter to win a $350 rewards card


Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
  Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

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.

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

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.