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Shure A15RF RF Filter, XLR In/Out, Passes Phantom Power

4.7 4.7 out of 5 stars 510 ratings

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RF Filter

Purchase options and add-ons

Brand Shure
Item Weight 3.2 ounces
Item Dimensions LxWxH 4.7 x 3.3 x 2.4 inches

About this item

  • The A15RF passes phantom power
  • Can be used with condenser microphones
  • The Shure A15RF reduces interference from AM radio stations that may bleed into microphone lines when using long cables in microphone installations such as suspending choir microphones
  • Country of Origin: China

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Shure A15RF RF Filter, XLR In/Out, Passes Phantom Power


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Product guides and documents

Product Description

The Shure A15RF reduces interference from AM radio stations that may bleed into microphone lines when using long cables in microphone installations such as suspending choir microphones. The A15RF passes phantom power, and can be used with condenser microphones. For best results, the A15RF should be installed at the end of the cable nearest to the microphone. In situations where this is not practical, the A15RF can also be installed at the mixer input, although RF attenuation may be somewhat reduced.


From the manufacturer

shure accessories

SHURE Quality

Since 1925, Shure has turned a passion for making great microphones and audio electronics into an obsession. Shure continues to set the worldwide industry standard for superior, reliable products. SHURE accessories have the same high-quality standard as all our products.


From the brand

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
510 global ratings

Customers say

Customers like the performance, quality and sound quality of the vacuum filter. For example, they mention it works great, it's well built and produces a low noise signal. Some say it eliminates radio interference. That said, opinions are mixed on the RF interference.

AI-generated from the text of customer reviews

42 customers mention39 positive3 negative

Customers are satisfied with the performance of the vacuum filter. They mention that it works great, drops the levels right where they need to be, and does not degrade the signal. Some say that it's wonderful and does make the system usable again.

"...It seems to work great with the Zoom H4n, which has really "hot" premaps...." Read more

"This Shure model is well built and does the job… however, -40 db is too much for my line-to-mic application...." Read more

"...Bam! These little babies are awesome. So far after 3 uses, they do wonders. I set my attenuator to -25 and just perfect!" Read more

"They work very well at the mixer in getting rid of am radio noise. However, we had a non common ground that was causing our problem...." Read more

31 customers mention31 positive0 negative

Customers are satisfied with the quality of the vacuum filter. They mention that it is well built, durable, and a valuable piece of hardware. The pad switch and XLRs seem to hold up well, and it is a great little tool.

"Very good item, totally solved the RFI problem i had of my radio signal getting into my mic cable...." Read more

"This Shure model is well built and does the job… however, -40 db is too much for my line-to-mic application...." Read more

"...Very high quality and a must have even to connect to a sound board." Read more

"...Great quality, too. Feels well-made, including the slide switch. Tip of the day: Don't cheap out on things like this...." Read more

26 customers mention19 positive7 negative

Customers like the sound quality of the vacuum filter. They mention that it makes for a perfect, low noise signal, greatly reduces audio levels, and works by killing the radio noise in their recordings. It's a great choice for audio interfaces without a high pass filter and is highly effective at eliminating AM radio interference.

"Work as intended. Greatly improved my sound quality for streaming. The audio sent to me was way too HOT!..." Read more

"...No more noise." Read more

"...Tried different mics, and turned the gain up. Don’t hear interference from anything. Not from my phone, wireless devices, neighbors, or anything...." Read more

"...but sometimes the problem is just the opposite and there is too much volume. For this kind of problem, this little thing is a great solution...." Read more

5 customers mention5 positive0 negative

Customers are happy with the adjustability of the vacuum filter. They mention that the attenuation level can be adjusted from 15 to 25 dB, and that it comes in very handy in their installation. They also say that the 15 db is just the right amount of attenution to allow them to set the trim level at.

"...This attenuator fixes that. The ability to adjust attenuation is a great feature. And yes, it really does pass phantom power...." Read more

"...15dB is just the right amount of attenuation to allow me to set the trim level at maximum and use the internal settings to fine-tune the level...." Read more

"Nice barrel with quality XLR connectors. Attenuation level can be adjusted - 15, 20 or 25 dB selectable...." Read more

"...It lowers the level perfectly for this. All metal construction. No noise, no fuss...." Read more

7 customers mention4 positive3 negative

Customers are mixed about the rf interference. Some mention that the go between makes the signal to the mixing board perfect, clear as a bell, and there is absolutely no noticeable RF with these in place. However, others say that it didn't help with RF interference, and had unexpected RF problems.

"...Now our signal is clear as a bell. The difference is night and day. This product did exactly what I needed it to do. Highly recommended." Read more

"Last November I had unexpected RF interference right in the middle of church service...." Read more

"...This go between makes the signal to the mixing board perfect. With the drop down setting -15, -20, -15, you'll be covered...." Read more

"It did not solve the rf problem on the Mackie 1402VLZ that was demodulating a nearby AM radio station...." Read more

Shure works good!
5 Stars
Shure works good!
The microphone on my Denon MC4000 runs extremely hot. The slightest upward adjustment on my volume knob would case horrible feedback. This attenuator solved the problem 110%.. no more feedback and I have a fuller range of microphone sound control. Not the cheapest attenuator out there, but the solid build quality from a reputable company like Shure justifies the premium price.
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Top reviews from other countries

Translate all reviews to English
tony manning
5.0 out of 5 stars good heavy duty feel
Reviewed in Canada on May 29, 2023
style: Switchable AttenuatorVerified Purchase
Cliente de Amazon
1.0 out of 5 stars Muy malo
Reviewed in Mexico on June 27, 2019
style: Switchable AttenuatorVerified Purchase
da2
5.0 out of 5 stars 使い勝手良い
Reviewed in Japan on September 4, 2023
style: Switchable AttenuatorVerified Purchase
Maureen White
5.0 out of 5 stars Qualify
Reviewed in Canada on August 13, 2023
style: High Pass FilterVerified Purchase
アップルティー
1.0 out of 5 stars 購入前にちゃんと確認しよう!というレビューです
Reviewed in Japan on April 13, 2023
style: Switchable AttenuatorVerified Purchase
Customer image
アップルティー
1.0 out of 5 stars 購入前にちゃんと確認しよう!というレビューです
Reviewed in Japan on April 13, 2023
きっとshureだから!この形はきっと!
そういう期待で購入しました。。。
いやー、多分SHUREのせいではありませんね。
レビュー記事が全部外国語だったので読まずに形だけで購入してしまいました〜

SHUREのSM57のゲイン増幅のために捜していたブースターのところで見つけてしまったのがそもそもの発端です。
SHUREだからSHURE製品で揃えたらいいんじゃない?
価格もどこより安いし!と思ったのがミス。
この製品はゲインを稼ぐの逆パターンで使うものだったらしい。

日本語のレビュー記事が無いのに意気揚々とポチってしまいました。
でも、多分良い製品なのだと思います。
自分には合っていなかったというだけで、教訓を得ました。
ちゃんと英語レビューも翻訳してみよう!!

SHUREがゲイン稼ぐこの手の製品を出していただけるとありがたいです。
一応、星は一つずつにしておきました、ごめんなさい・・・
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Customer image
4 people found this helpful
Report