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RadioShack® Communication Extension Speaker



 | Catalog #: 21-131
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Product Summary

Hear your ham.

Hear your ham radio or CB on the road with this communication extension speaker from RadioShack. It's ideal for use with CBs, scanners, ham radios and other communication products. This heavy-duty 3.5-inch speaker has a frequency response of 300Hz-10kHz that provides you with plenty of sound. It includes an adjustable metal swivel stand, mounting brackets and more.

  • Ideal for CB, scanner, ham and other communication products
  • Features a heavy-duty 3.5-inch speaker with a metal grill cover
  • Frequency response: 300Hz-10kHz
  • Comes with an adjustable metal swivel stand and mounting bracket
  • 3.5mm audio input jack
Pricing and availability: Please note that all prices are subject to change without prior notice. Prices advertised on this site are for online orders only. Prices on some items may differ from those advertised in RadioShack stores. All merchandise may not be available at all stores, and all stores may not participate in all sales promotions. We recommend you contact the store to confirm product availability and price.


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By phone: 1-800-843-7422

Manufacturer Warranty

  • Parts: 90 days
  • Labor: 90 days
Tech Specs
Product Support

Product support (2 matches)

Date added Document
October 04, 2013 RadioShack Communication Extension Speaker (Guía Del Usuario (Rev. B))
October 04, 2013 RadioShack Communication Extension Speaker (User's Guide (Rev. B))

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Customer Reviews


by PowerReviews
RadioShack® Communication Extension Speaker

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

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(8 of 9 customers found this review helpful)


Big speaker low sound

By Where are the parts...

from NH

About Me Power User


  • Easy To Set Up
  • Easy To Use


  • Flimsy Construction
  • Large size
  • Sound quality low
  • Volume for size low

Best Uses

  • In a pinch speaker
  • Only used rarely

Comments about RadioShack® Communication Extension Speaker:

Purchased as a speaker for my Ham radio mobile rig last year. quickly gave it up for a MFJ smaller speaker with better volume, sound quality and oh yeah 1/4 the size to make it easier to mount. All for the same price if no a little cheaper.

  • Primary use:
  • Personal
  • Was this a gift?:
  • No

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