American International AS100

Antenna noise filter

Item #: 003AS100

14 Reviews

This item is no longer available.

Original Price: $9.99

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If you're hearing noise when you listen to the radio, but not when you listen to a tape or CD, the Xterminator may be the answer. American International's AS100 filter is designed to stop noise from entering your car stereo system through your antenna. It simply plugs in-line between your antenna and your in-dash receiver. Uses standard "Motorola" type input and output.

Please call an Advisor at 1-888-955-6000 to see if any antenna adapters are needed to install this filter. Or, enter your vehicle information, and we'll contact you before shipping your order if they're needed for installing this filter in your vehicle.

American International AS100 Reviews

Average Customer Review:

14 reviews
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Surprised....It Really Works

Written By John M, Massachusetts on Saturday, April 07, 2012

Crutchfield Customer Review (What's this?)

Bought a new JVC HD head unit from Crutchfield....the CD/USB fine, but the radio was useless - a screetching and wailing mess from interference. I ordered this filter but frankly had low expectations. It should not have. Of course, incredibly easy to install, it eliminated all the screetching and wailing (which I think was caused by the very high sensitivity of the JVC's HD tuner), and the radio is now fully usable. I haven't tried it on a long drive yet to see if it has significantly reduced the tuner's sensitivity. For $10, it is a no-brainer. (And yeah I know the production cost is about $1.25....) I wonder if this problem is more common on HD radios.....if so, Crutchfield should suggest buying this with any HD unit.

Pros: Easy to install, actually works as advertised....could not be easier.

Cons: yet to see if it has significantly reduced the tuner's sensitivity, hopefully not.

worked great in our race trailer

Written By Rhonda, Germantown, OH on Wednesday, September 07, 2011

Crutchfield Customer Review (What's this?)

We installed this little guy along with the S-15A. The combination of the two worked wonders on our 12 volt radio in our race trailer. We had a lot of humming and static and noise whenever we started up the generator. All better now.


Best bucks I ever spent

Written By Jeff W, Washington DC on Friday, November 05, 2010

Crutchfield Customer Review (What's this?)

This filter took the AM station I listen to on my commute from largely unlistenable 80% of
the time to virtually static free. I can now listen to the station during the entire commute,
with hardly any static! The only time it couldn't filter out was when the EMI was so great
(we have a 3rd world electrical infrastructure with wires everywhere), that other
frequencies actually bled through.

Freakishly simple to install and the difference is literally night and day. Get this if you
have a lot of antenna-driven RF. It's a no-brainer.

Worked in reverse.

Written By Therian, LI, NY. on Thursday, April 08, 2010

I was getting lots of noise on the radio so I figured I'd give it a shot. With this filter in line, the noise level stayed the same, but the reception dropped by about 40+% so it actually made things worse.

When you check out, the website asks for the model of your car as you may need an adaptor.

This filter is just one tiny little choke in a big plastic housing, it's easily 2-3 times larger than it needs to be.

I've never been motivated to write an online review before buying this product. I hope I can help keep someone from throwing away their money like I did. It would have been a lot less work to just throw my money in the trash.

06 Acura RSX

Written By Bnguyen, Los Angeles, CA on Tuesday, November 18, 2008

Crutchfield Customer Review (What's this?)

Installed in conjunction with the iPod adaptor and I noticed a reduction in noise and the clarity of radio stations was greatly improved. Of course not the greatest but so far a thumbs up for me.

not good

Written By MEDINA, miami on Wednesday, October 29, 2008

this product does not work for me went i install it my radio don't have power at all i dont know why maybe needs a ground

Scion Xb

Written By aris, Simi valley ,CA on Monday, October 13, 2008

Crutchfield Customer Review (What's this?)

When i hear static or noise on my radio i am thinking abaout,how can i
make the noise disapear?So i search and i chosed this.
I have scion Xb,when i put it in nothing change.(i stay at the same place
and same station ) all i hear same as before i instal this noise filter.
So basicly this stuff does not improve my radio.
So if you own Scion Xb,just stick with your factory antena.(no need noise
filter) is not worth it.
****.Scion Xb Rock.****

American International AS100

Written By Freestyle, Seattle, Wa on Wednesday, December 12, 2007

Crutchfield Customer Review (What's this?)

This filter works amazingly well. I have a stock radio in a 06 Chevy Avalanche that got terrible reception with am radio, tons of static any time I went by power poles. This filter completely solved the problem! I did have to buy a couple of adaptors so the motorola input and output would work with OEM Chevy, but well worth the price and the effort.

American International AS100

Written By Kari, West Palm Beach, FL on Friday, September 21, 2007

Crutchfield Customer Review (What's this?)

I was hearing noise and static when listening to the radio, but when listening to CD or aux input the sound was very clear. This product does exactly what it says. Installation was a snap, just plug the filter between your head unit and your antenna line and presto! I couldn't believe the clarity. The antenna noise is gone! I can barely tell the difference between radio and CD quality. Now I listen to the radio much more often. I would definitely recommend this product if you are having problems with antenna noise.

Once again....

Written By Jose, Los Angeles, CA on Thursday, May 03, 2007

This product is great when used by itself. I did not expect it to work this well (or at all) considering how much it cost. Like the previous review said, when used in conjunction with the signal amplifier (item #12044UA60) the results are simply fascinating. Keep in mind that this will not reduce any noise caused by your vehicle's electrical system, ONLY the antenna signal! But really there's only one way for you to find out.

This item works great

Written By Thomas, Charlestown, NH on Saturday, March 03, 2007

Crutchfield Customer Review (What's this?)

I bought this item together with the S15A inline electrical noise filter to stop the terrible noise in a Mack truck. I have a portable radio set consisting of a CB and AF/FM radio that I move from different Mack tractors that I drive. The CB and AM radios were nearly useless from engine noise. I installed the AS100 first and realized that I didn't need the S15A because the AS100 filter worked so well. So I installed the S15A to my CB radio instead and now that radio is quieter too. My conclusion is that they both do the job well but this antenna filter exeeded my expectations. All noise is gone.

American International AS100

Written By Tim, usa on Thursday, June 01, 2006

My filter had so much loss I opened the case to find a wire was broken.
After fixing the wire the filter still had a lot of loss when inline.
This filter did not stop ignition noise from coils mounted on each sparkplug.
Even the tech at Americon International said this filter would not stop ignition noise!!!

American International AS100 in an '89 Riviera w/ Bose system

Written By Nik, Wisconsin on Thursday, May 25, 2006

Crutchfield Customer Review (What's this?)

I purchased this product to use in conjunction with the American International S15A. This product helped somewhat, but did not eliminate the noise. I have tried all the electronics on my vehicle, noise filters, and antenna filters. I was kinda hoping that this would take care of it, but I guess nothing is ever easy. Though it did help and every little bit helps.


Written By Chris, CA on Thursday, December 15, 2005

Crutchfield Customer Review (What's this?)

Wow when this filter is used in conjunction with a Metra 44-UA60 FM Signal Amplifier w/ Bypass Switch, it is simply amazing. I could not believe the clarity. Made me actually listen to the radio, could not stand radio before this filter and the amplifier. Can't beat what it gives you for the price.

Hands-on research

What's in the box?

Download owner's manual

  • AS100 Antenna stereo noise filter with 9" attached cable terminated with a standard male Motorola plug

Product Research


Overview: If you're hearing noise when you listen to the radio, but not when you listen to a tape or CD, the Xterminator filter may be the answer. This filter is designed to stop noise from entering your car stereo system through your antenna. It simply plugs in-line between your antenna and your in-dash receiver, using a standard female Motorola input and a standard male Motorola output.

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.