--- product_id: 347646743 title: "Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power" brand: "shure" price: "€ 143.51" currency: EUR in_stock: true reviews_count: 5 category: "Shure" url: https://www.desertcart.be/products/347646743-shure-a15as-switchable-attenuator-15-20-25-db-passes-phantom store_origin: BE region: Belgium --- # Phantom power pass-through 3-step attenuation switch Full magnetic shielding Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power **Brand:** shure **Price:** € 143.51 **Availability:** ✅ In Stock ## Summary > 🎛️ Master your mic levels like a pro — never miss a beat or a decibel! ## Quick Answers - **What is this?** Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power by shure - **How much does it cost?** € 143.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/347646743-shure-a15as-switchable-attenuator-15-20-25-db-passes-phantom) ## Best For - shure enthusiasts ## Why This Product - Trusted shure brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Phantom Power Friendly:** Maintain pristine condenser mic performance with uninterrupted phantom power flow. - • **Compact & Durable Design:** Sleek 19mm diameter and 114mm length with rugged steel and enamel finish built to last in any pro setup. - • **Robust Magnetic Shielding:** Steel housing with full magnetic shielding ensures interference-free, crystal-clear audio capture. - • **Precision Attenuation Control:** Switch seamlessly between 15, 20, or 25 dB to perfectly manage high-output mic signals without distortion. - • **Versatile Pro Audio Compatibility:** Effortlessly integrates with XLR-equipped microphones, mixers, and recorders for flawless signal management. ## Overview The Shure A15AS Switchable Attenuator is a compact, rugged inline device offering selectable 15, 20, or 25 dB attenuation to prevent signal overload in professional audio setups. It supports phantom power pass-through for condenser mics and features full magnetic shielding to eliminate interference, making it an essential tool for live performances and studio recordings. ## 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.The A15AS is equipped with a female 3-pin XLR connector on the input side, and a male 3-pin XLR connector on the output side. Attenuation is controlled by a three-position slide switch. The A15AS allows phantom power to pass through from the mixer to the microphone, so it can be used with condenser microphones. Review: Saved the day even when used way outside it's specs - This was designed as a mic level device only. However, I tried it in a pinch to reduce wind (fan) noise picked up by a tiny condenser mic during a video shoot. The A15HP blocks phantom power, so I had to inserted into the line level feed that came out of the mixer. (Ouch.) The mics were all picking up normal speech frequencies - no deep bass other than the wind - so the tiny inductors in this HP filter were not overloaded noticeably, and the feed was cleaned up dramatically. As a bonus, it tightened the bottom of some SM-58 style cardioid dynamic mics that were being worked too close. For reference, the level into this Shure filter averaged around 1V RMS (way too high), but the load impedance was good - 50K (an FMR RNC1773 used to step on the camera feed.) This device performs beyond the call of duty when loaded very lightly, and that saved the situation. Would I normally recommend an A15HP for this application? Nope. Did it work amazingly well? Yup. Get one for your ENG / recording studio toolbox. Review: Qualify - Works great, eliminates most interference ## Features - Frequency Response - 20 to 20,000 Hz ±0.5 dB - Attenuation Switch - 15 dB, 20 dB, 25 dB - Housing - Full magnetic shield; steel with gray enamel finish - Dimensions - 19 mm (.75 in.) diameter; 114 mm (4.5 in.) long ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002J1JKY | | Antenna Location | Live performances, Studio recordings | | Audible Noise | 25 Decibels | | Audio Sensitivity | 25 Decibels | | Brand | Shure | | Built-In Media | Microphone | | Color | #N/A | | Compatible Devices | Microphones with XLR connectors, Mixers with XLR inputs, Recorders with XLR inputs | | Connectivity Technology | XLR | | Connector Type | 3.5 mm Jack | | Customer Reviews | 4.6 out of 5 stars 577 Reviews | | Enclosure Material | Alloy Steel, Copper | | Frequency Range | 20 hz 20 khz | | Frequency Response | 20000 Hz | | Global Trade Identification Number | 00042406054010 | | Impedance | 150 Ohms | | Item Dimensions | 20.1 x 14 x 2.5 centimeters | | Item Weight | 91 g | | Manufacturer | Shure Incorporated | | Mfr Part Number | A15AS | | Model Name | A15AS | | Model Number | A15AS | | Number of Channels | 1 | | Power Source | Corded Electric | | Signal-to-Noise Ratio | 25 dB | | Special Feature | XLR | | UPC | 042406054010 | | Unit Count | 1 Count | ## Product Details - **Operation mode:** ON-OFF - **Contact type:** Normally Open - **Connector type:** 3.5 mm Jack - **Brand:** Shure - **Switch type:** Pressure Switch ## Images ![Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power - Image 1](https://m.media-amazon.com/images/I/413pzK1z4bL.jpg) ![Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power - Image 2](https://m.media-amazon.com/images/I/41L2SO20R2L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: I need to reduce signal level from a 2-ch preamp to a 2-ch power amp. How tight a tolerance do these attenuators maintain?** A: You will need two of these...one for left and one for right. The tolerance on Shure equipment is tight and professional in tolerances stated. These will work well places between a preamp output and an amplifier line/aux input. When an input is overdriven with too much signal it will distort at any and all volumes...these units allow the preamp to not overdrive the input stage of the power amplifier so that the power amp starts with a distortion free input signal that it can amplify to the speakers. **Q: Can I use this for echo feed back on microphone** A: the short answer is "no" ummm.... It MIGHT help a little tiny bit, but even if it does help, most humans would not be able to tell. That's not what it's meant for. It's meant specifically to diminish frequencies below 100Hz. Feedback is ALMOST never caused by frequencies below 80hz. In fact, I would actually argue that most feedback is caused exclusively by vocals pushing their own individual signal (or the overall master/bus) over the threshold that allows the mic to "hear itself through the speakers". That means frequencies in the 180ish hertz to 5,000ish hertz(and quite often even higher). Feedback control is more about dynamics and overall volume(particularly on stage), mostly because not many sound engineers or performers care to tune the PA or the room/venue to suppress the resonant frequencies that turn into feedback. Having your main speakers in line with the band/performers/entertainment is also not the most advantageous thing to do for the same reason; the culprit resonant frequencies will start accumulating shortly after your PA is set up. The microphone hears a signal then sends it out through the speakers, which then get picked up through the microphone again, and then back out through speakers. If you have feedback problems, this device MIGHT clean up your overall sound a bit, but will not eliminate feedback. If you want to rid yourself of feedback you should consider; tuning the room/venue with sound absorption, moving your mics closer to their source, having a quiet stage(in ear monitors), or spend lots of money on real nice and smooth main PA speakers and spend decent amounts of time on their placement in that room/venue. Hope that helps. **Q: do i need 2 of these if hooking up to h4n? if not, won't it only record 1 sided?** A: Short answer would be yes you would need two of these for a full stereo BUT you could use just one of these and then a y cable to feed the or source the one mono signal to both stereo channels so then if you really did not need stereo then one of these and a y cable will yield two channels with same mono audio on each of the two channels and that may be completely acceptable audio as it will sound fine but not be true stereo but will be audio on both channels...Gordon **Q: Will this attenuator cut a line level signal from a consumer device (like a Roku player...-10dB?) to be used as mic level input on a pro mixer?** A: I believe it'll solve your problem. I am using it to feed the line level input from a Shure wireless mic receiver (line out) to the mic inputs on a Zoom recorder. The line-to-mic feed I've described works like a charm with this adapter. I have a pair of them. Best regards, Bill ## Customer Reviews ### ⭐⭐⭐⭐⭐ Saved the day even when used way outside it's specs *by H***Y on 3 November 2014* This was designed as a mic level device only. However, I tried it in a pinch to reduce wind (fan) noise picked up by a tiny condenser mic during a video shoot. The A15HP blocks phantom power, so I had to inserted into the line level feed that came out of the mixer. (Ouch.) The mics were all picking up normal speech frequencies - no deep bass other than the wind - so the tiny inductors in this HP filter were not overloaded noticeably, and the feed was cleaned up dramatically. As a bonus, it tightened the bottom of some SM-58 style cardioid dynamic mics that were being worked too close. For reference, the level into this Shure filter averaged around 1V RMS (way too high), but the load impedance was good - 50K (an FMR RNC1773 used to step on the camera feed.) This device performs beyond the call of duty when loaded very lightly, and that saved the situation. Would I normally recommend an A15HP for this application? Nope. Did it work amazingly well? Yup. Get one for your ENG / recording studio toolbox. ### ⭐⭐⭐⭐⭐ Qualify *by M***E on 13 August 2023* Works great, eliminates most interference ### ⭐⭐⭐⭐⭐ とても便利です。 *by D***I on 28 September 2025* マイクレベルの入力しか受け付けない会場の音響装置にラインレベルの出力機器を接続する際に使用しています。 本体が長いので、XLRケーブルの中間に挟んで使いました。 ## Frequently Bought Together - Shure A15AS Switchable Attenuator (15, 20, 25 dB), Passes Phantom Power - Cable Matters 3.5mm to XLR Cable - 6ft, Male to Male XLR to 1/8 Inch Cable, Compatible with iPod, MP3 Player, Laptop, Voice Recorder, and More, Black – Not for Microphone Use - CableCreation [5-Pair XLR Female to Female & XLR Male to Male 3PIN Adapter Connector Compatible Microphone,Mixer,Silver --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/347646743-shure-a15as-switchable-attenuator-15-20-25-db-passes-phantom](https://www.desertcart.be/products/347646743-shure-a15as-switchable-attenuator-15-20-25-db-passes-phantom) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-28*