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SIRIUS 50-foot Antenna Extension Cable

For car, marine, or home use

4 Reviews | 5 questions - 11 answers

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Item # 220SIRXT50

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Our take on the SIRIUS 50-foot Antenna Extension Cable

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.

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.

Any Sirius XM fan that needs to extend to their antenna long distance will love this product. Simple to install and a strong performer!

Bob, Valley Stream, NY

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)

SIRIUS 50-foot Antenna Extension Cable Reviews

Average Customer Review(s):

(4 Reviews)

Strong Performance

Bob from Valley Stream, NY on 1/28/2017

Crutchfield Customer Review (What's this?)

Any Sirius XM fan that needs to extend to their antenna long distance will love this product. Simple to install and a strong performer!

Pros: Performance!

Cons: None found

Use your factory satellite antenna in GM Outlook, Enclave, Traverse...

Eric from carrollton, TX on 2/1/2016

Crutchfield Customer Review (What's this?)

Recently upgraded my 2009 Saturn Outlook stereo to a Pioneer NEX unit. Also decided to replace the XM unit with a new Sirius tuner. I was told I would need to use the supplied Sirius antenna. After some research, I found the factory XM unit for my car in the left rear compartment where the car jack is stored. I unplugged the antenna (there were 3 plugs, the greenish-mustard colored one was for the satellite antenna), and connected this cable and ran it up to the front and connected it to the new Sirius unit. Worked like a charm. My guess is this set-up will work for other GM related products like the Acadia, Traverse and Enclave.

Pros: Cable was sturdy and made a very positive connection.

Cons: Length. This cord is 50' long, only needed about half of that. I have a bunch of extra cable but was able to hide it under the floor in the trunk.

50' extension

Tech89 from Columbus City, Iowa on 5/7/2015

Crutchfield Customer Review (What's this?)

I was looking for an extension that would fit my factory antenna. My antenna (2009 Buick Lucerne CXL) plugs into the XM module in the trunk, thus the factory cable end about ten feet short. The aftermaket tuner supplies is own antenna but in nothing compared to the factory one. Signal would drop out all of the time. This adapter plugged right in and i was reasy to go in less than an hour. Zero drop outs. All i use is Xm so this product saved the day big time. It's a must for factory antenna that dont reach! Night and day difference.

Pros: Amplified.

Cons: Too long. Should be offered in 5 foot increments.


Mark Allen from Monticello, Ar on 11/13/2014

Crutchfield Customer Review (What's this?)

Just what I ordered works great

Pros: Easy to install

Cons: Great price


Hands-on research

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

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Needed to do an exterior antenna so this fit the bill nicely [ Mike  Jul 20, 2017 ]
antenna location greatly affects reception of my mobile Sirius satellite radio - needed more length between antenna and receiver to get to optimum antenna locations [ Patricia A.  Jun 24, 2017 ]
antenna cable furnished with home docking station not long enough to get reception. This one should give me enough to get to the south side of house. [ LOMAX  May 04, 2017 ]
own a satellite radio and want better reception at my office but needed extension cord for antenna . [ Cynthia  Jan 08, 2017 ]
Needed the extra length for a roof eve mount. [ CW  Dec 03, 2016 ]
I don't get good Sirius/XM satellite reception at my home. Bought this cable and an antenna from Crutchfield to mount somewhere on my roof and run down to my new Yahama AVR. [ riderjwc  Aug 04, 2016 ]
The stock ant cable is too short for the sat radio [ Glenn  Jul 19, 2016 ]
To install outside antenna [ Glenn  Feb 20, 2016 ]

5 questions already asked

No that's not too far. I ran my extensions 100 feet and have no problems with reception [ Philip  Jan 17, 2016 ]
have only used one but don't see why extension wouldn't; work [ William  Jan 16, 2016 ]
Yes! [ Jim  Jun 09, 2015 ]
Hello Jerry It should/will work. It is just an extension of the short cord you get from Sirius. About 30 feet of mine is outside. The connector is water proof. This should allow you to get your tunes in your rig. Enjoy. Safe travels. Mike [ Michael  Jun 08, 2015 ]
YEs. The large end is a weather resistant cover for the plug. [ FRANK  May 06, 2015 ]
Hello Jay That had me concerned also. However it is a safety feature. It keeps the connection from coming lose and even adds a cover over the connection. It caused no problems. Mike [ Michael  May 06, 2015 ]
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 ]