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Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power

4.7 4.7 out of 5 stars 510 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Radio Frequency Attenuators by Shure

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Switchable Attenuator

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About this item

  • Package Dimensions: 2.032 cms (L) x 2.54 cms (W) x 9.398 cms (H)
  • Product Type: Microphone
  • Package Quantity: 1
  • Country Of Origin: Mexico

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Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power


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Product guides and documents

What's in the box

  • microphone
  • Product Description

    The Shure A15AS Switchable In-Line Attenuator reduces the level of any balanced microphone or line-level signal by 15, 20, or 25 db. It is specially suited to reducing the level of a high-output microphone to prevent it from overloading the microphone input of a mixer or recorder in applications with high sound pressure levels. In addition, the A15AS may be used to reduce the level of a line-level mixer output to prevent overloading the aux-level input of a recorder.


    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

    "No problems or complaints. I was even able to switch out the capacitor on one of them to change the rolloff frequency. WILL CONTINUE TO BUY." 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 the United States

    Reviewed in the United States on July 24, 2021
    style: Switchable AttenuatorVerified Purchase
    3 people found this helpful
    Report
    Reviewed in the United States on December 2, 2023
    style: RF FilterVerified Purchase
    Reviewed in the United States on January 6, 2024
    style: Switchable AttenuatorVerified Purchase
    Reviewed in the United States on April 17, 2022
    style: Line AdapterVerified Purchase
    One person found this helpful
    Report
    Reviewed in the United States on January 30, 2023
    style: RF FilterVerified Purchase
    2 people found this helpful
    Report
    Reviewed in the United States on August 11, 2023
    style: Switchable AttenuatorVerified Purchase
    Reviewed in the United States on February 12, 2022
    style: Switchable AttenuatorVerified Purchase
    One person found this helpful
    Report
    Reviewed in the United States on October 25, 2023
    style: Switchable AttenuatorVerified Purchase

    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