SIRIUS 50-foot Antenna Extension Cable

For car, marine, or home use

Item #: 220SIRXT50

In Stock

1 Review | 1 question - 4 answers

Your price: $39.99 Earn up to 40 Rewards points

Add to Cart Free Shipping

+ Add to wishlist + Email me alerts for this product

View all associated offers

Your SIRIUS antenna's cable may not be long enough if you're installing a SIRIUS radio in an extra-large vehicle, boat, business, or home. This 50-foot extension cable lets you make long cable runs with ease. Warranty: 1 year.

A SIRIUS antenna is not included. This extension cable is only compatible with single-input SIRIUS antennas.

Hands-on research

What's in the box?

  • 50' Sirius antenna extension cable with in-line amplifier (has SMB connectors on each end)
  • Rubber boot (installed on amplifier)
  • Installation instructions (under packaging flap)

Product Research


Overview: The SIR-EXT50 is a 50' extension cable with an in-line amplifier for use with Sirius antennas; the kit is not compatible with XM satellite radio antennas. It can be used for Sirius mobile or home receivers.

Cable and Connector: The SIR-EXT50 antenna extension cable is a single 50' coaxial cable with single SMB connectors (without the plastic FAKRA-type plastic housing) on each end. The extension cable is equipped an in-line signal amplifier (10dB gain) on one end with a weather-resistant rubber boot. The other end plugs directly into single-input Sirius Satellite Radio receivers.

Extension Limits: No more than 2 extension kits should be connected back-to-back.

Cable Care: The full length of the extension cable should be used--it should not be cut, spliced or otherwise shortened. The cable should not be kinked. You should avoid bending the cable in a radius of less than an inch. The cable can be used outdoors, but it should not be exposed to severe environmental conditions. The in-line signal amplifier should be mounted upright, oriented so the label is readable right side up.


  • Cable Type: RG-58
  • Cable Length: 50'
  • Frequency: 2300 to 2400 MHz
  • Amplifier Gain: 10dB +/- 1dB @ 2300 MHz
  • Return Loss: -10dB
  • Connectors: SMB

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.

SIRIUS 50-foot Antenna Extension Cable Reviews

Average Customer Review:

1 reviews
Review this product
Great Gear Giveaway

Submit a review and then enter to win a $500 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


Written By Mark Allen, Monticello, Ar on Thursday, November 13, 2014

Crutchfield Customer Review (What's this?)

Just what I ordered works great

Pros: Easy to install

Cons: Great price

Questions & Answers Ask the community. Share your knowledge.

1 question already asked

Pretty straight forward, plugs in between the antenna lead and your receiver. [ KEVIN  Aug 26, 2014 ]
Yes, In my application the smaller end of this cable went into the Sirius SXV200V1 tuner, and the larger end I connected to my car's factory Sirius antenna. [ Nick  Aug 26, 2014 ]
It's just like an extension cord. One end is male and the other has a female end inside of that large plastic thing. To conserve space I removed the big plastic cover from around the female end and then covered the connection with shrink tubing. [ Donald  Aug 26, 2014 ]
Hi Wayne, The 50 foot extension cable is really easy to apply. There are many applications that you can use: For example some people bury the cable underground some simply tuck it under the house siding if applicable. One side connects to the antenna port on the radio back the other side to the antenna itself. Don't be afraid to tackle it. Make sure the antenna is pointed correctly using the signal strength meter on your Sirius Radio and have someone spot you on the ladder... Enjoy the Music! Bob [ ROBERT  Aug 26, 2014 ]