Concertone SW-BOX4

Ported subwoofer enclosure with 8" sub for RVs

  • Concertone SW-BOX4


  • Concertone SW-BOX4


  • Concertone SW-BOX4

Item #: 804SWBOX4

Review Summary

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Our take on the Concertone SW-BOX4

by John Pollard

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.

See more info on this item


  • 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 from the Crutchfield Labs (what are the Labs?)

Product Research
What's in the box?

  • SW-BOX4 Enclosure with 8" Subwoofer installed

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 open the box, verify contents, 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.


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

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3 out of 5

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.
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For a more in-depth review and enhanced detailed information on the Concertone SW-BOX4, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_804SWBOX4/Concertone-SW-BOX4.html ).