--- product_id: 5288978 title: "OnStage On-Stage SSA20M Speaker Mount Adapter with M20 Threading, Black" brand: "onstage" price: "Β£18.44" currency: GBP in_stock: true reviews_count: 13 category: "On Stage" url: https://www.desertcart.co.uk/products/5288978-onstage-on-stage-ssa20m-speaker-mount-adapter-with-m20-threading store_origin: GB region: United Kingdom --- # M20 Threading for rock-solid fit Lightweight 227g alloy steel Includes 4 mounting screws OnStage On-Stage SSA20M Speaker Mount Adapter with M20 Threading, Black **Brand:** onstage **Price:** Β£18.44 **Availability:** βœ… In Stock ## Summary > πŸ”Š Screw in stability, screw out the wobble! ## Quick Answers - **What is this?** OnStage On-Stage SSA20M Speaker Mount Adapter with M20 Threading, Black by onstage - **How much does it cost?** Β£18.44 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/5288978-onstage-on-stage-ssa20m-speaker-mount-adapter-with-m20-threading) ## Best For - onstage enthusiasts ## Why This Product - Trusted onstage brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Heavy-Duty Alloy Steel:** Durable yet lightweight 227g build for easy transport and lasting strength - β€’ **Plug & Play Replacement:** Direct swap for 1 3/8" socketsβ€”no hassle, just solid support - β€’ **Universal Compatibility:** Works seamlessly with OnStage SS7746 adjustable subwoofer shaft and many others - β€’ **Pro-Grade Installation Kit:** Includes all mounting screws for a secure, rock-steady setup - β€’ **Threaded Stability Upgrade:** M20 threading eliminates wobble for pro-grade speaker mounting ## Overview The OnStage SSA20M Speaker Mount Adapter is a precision-engineered, M20 threaded replacement socket designed to provide a wobble-free, rock-solid connection between subwoofers and speaker poles. Crafted from lightweight alloy steel and including mounting screws, it’s compatible with OnStage adjustable shafts and many standard mounts, delivering professional-grade stability and easy installation for superior audio setups. ## Description Product Description Upgrade your subwoofers! Replace existing 1 3/8" Sockets with the SSA20M Threaded speaker Adapter. Designed to be a direct replacement for most socket mounts; simply remove and replace. M20 threading provides a rock-solid, wobble-free connection between the subwoofer and compatible speaker poles. Perfect for use with the SS7746 adjustable subwoofer shaft. From the Manufacturer Upgrade your subwoofers! Replace existing 1 3/8" sockets with the SSA20M threaded speaker adapter. Designed to be a direct replacement for most socket mounts; simply remove and replace. M20 threading provides a rock-solid, wobble-free connection between the subwoofer and compatible speaker poles. Perfect for use with the SS7746 Adjustable Subwoofer Shaft. Review: Great product, great value, doesn't work out-of-the-box for ElectroVoice ZXA1Subs. I plan to buy more. - This is a very sturdy piece of steel. You can use this "Top Hat" to replace the 1 3/8" smooth socket you get with most subs. This is threaded - most are not. When they are not threaded then the pole that fits into this socket actually has too much play in it. Extend the pole up about 3 feet and put a PA cab on top of it and it makes the Leaning Tower Of Pisa look straight. The pole will flop all over the place and the speaker atop it will be all askew and look really stupid, like its about to fall over. Inserting this speaker pole mount allows you to use a threaded pole that screws into it so it doesn't wobble. Now, this mount DOES NOT WORK with the stock ElectroVoice ZXA1Sub, which has a THREE-HOLE mount with a smaller outer diameter than this one. The EV Sub's hole is recessed so this doesn't fit into it, but luckily it fits OVER it. You'll need to drill new holes and by bolts and T-Nuts. I wouldn't use the wood screws that this mount comes with - they may tear out of the wood if the PA Cab atop the pole is jossled. It was regardless very easy to install and all the screws and t-nuts are available at your local hardware store for under $10. Works like a charm. I will buy more of these! Good product, good price and fast shipping! -UPDATE: I gigged with these last weekend and they are as solid as a rock! I'm happier than a clam at high tide! One more thing, as an afterthought, you probably want to protect the thread on the poles that fit into these sockets. Again, take a pole to your local hardware store and buy some rubber "feet" - the kind they put on the bottom of metal tube chairs and such. The Ace Hardware part#/SKU is 51245 - it is a solid white rubber "foot". I paid $2.49 for a pack of four. I drilled a hole through mine and put a cord through it and attached it to the pole so that when I remove them from the pole they're still tied to the pole and don't get lost. You don't want those threads to get damaged, or even dirty, while transporting and storing them. -G Review: Works great on my EV ZXA1 sub, really solid and wobble-free - Saw another reviewer used these on his EV ZXA1 sub, I followed their idea, and it worked like a charm. The plate on this is only about 1/4 larger in diameter than the inset for the factory installed cup flange. Since it was so close, airflow would be an issue if I just bolted this over. I bought a package of flat gasket material at the hardware store that was basically 1/8" rubber and cork sheets. I traced the flange onto those and stacked the gasket material up (rubber, cork, rubber) to completely fill the existing inset then cut a smaller center hole out of the middle of my gasket stack to make room for the threaded inset of this mount (looked like a donut). Buy high quality threaded t-nut inserts that you can bang into the inside of the box so you're threading bolts in to mount this to ensure a really tight fit. Just take the grill and woofer off, drill the holes, and hammer these nuts into the top of the case in each hole you drilled. You'll need to buy matching bolts that are about 1/2" longer than the ones you take out of the factory cup since this sits on top of the box surface. You can leave leave the woofer attached, the wire is long. Vacuum it out and bolt it all together. I bought an On Stage threaded sub pole and T pole connector so I can mount both my QSC C8's on top of the sub for a compact PA. Slick. ## Features - Includes four mounting screws - Replacement adapter for your subwoofer mounting poles - Perfect to use with the On Stage Adjustable Subwoofer shaft - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00FKY86V6 | | Best Sellers Rank | #7,502 in Musical Instruments ( See Top 100 in Musical Instruments ) #11 in Monitor, Speaker & Subwoofer Parts #2,580 in Music Recording Equipment | | Brand Name | OnStage | | Color | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (315) | | Finish Types | Matte | | Global Trade Identification Number | 00659814101504 | | Included Components | 4 mounting screws | | Item Dimensions | 6 x 2 x 6 inches | | Item Type Name | Cabinet Adapter | | Item Weight | 227 Grams | | Manufacturer | OnStage | | Manufacturer Part Number | SSA20M | | Manufacturer Warranty Description | 3 years. | | Material Type | Alloy Steel | | Model Number | SSA20M | | Mounting Type | Screw Mount | | UPC | 659814101504 | ## Product Details - **Brand:** OnStage - **Color:** Black - **Item Weight:** 227 Grams - **Item dimensions L x W x H:** 6 x 2 x 6 inches - **Material:** Alloy Steel ## Images ![OnStage On-Stage SSA20M Speaker Mount Adapter with M20 Threading, Black - Image 1](https://m.media-amazon.com/images/I/51dMRGtw80L.jpg) ![OnStage On-Stage SSA20M Speaker Mount Adapter with M20 Threading, Black - Image 2](https://m.media-amazon.com/images/I/51mLWc4rS7L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product, great value, doesn't work out-of-the-box for ElectroVoice ZXA1Subs. I plan to buy more. *by B***Y on March 29, 2015* This is a very sturdy piece of steel. You can use this "Top Hat" to replace the 1 3/8" smooth socket you get with most subs. This is threaded - most are not. When they are not threaded then the pole that fits into this socket actually has too much play in it. Extend the pole up about 3 feet and put a PA cab on top of it and it makes the Leaning Tower Of Pisa look straight. The pole will flop all over the place and the speaker atop it will be all askew and look really stupid, like its about to fall over. Inserting this speaker pole mount allows you to use a threaded pole that screws into it so it doesn't wobble. Now, this mount DOES NOT WORK with the stock ElectroVoice ZXA1Sub, which has a THREE-HOLE mount with a smaller outer diameter than this one. The EV Sub's hole is recessed so this doesn't fit into it, but luckily it fits OVER it. You'll need to drill new holes and by bolts and T-Nuts. I wouldn't use the wood screws that this mount comes with - they may tear out of the wood if the PA Cab atop the pole is jossled. It was regardless very easy to install and all the screws and t-nuts are available at your local hardware store for under $10. Works like a charm. I will buy more of these! Good product, good price and fast shipping! -UPDATE: I gigged with these last weekend and they are as solid as a rock! I'm happier than a clam at high tide! One more thing, as an afterthought, you probably want to protect the thread on the poles that fit into these sockets. Again, take a pole to your local hardware store and buy some rubber "feet" - the kind they put on the bottom of metal tube chairs and such. The Ace Hardware part#/SKU is 51245 - it is a solid white rubber "foot". I paid $2.49 for a pack of four. I drilled a hole through mine and put a cord through it and attached it to the pole so that when I remove them from the pole they're still tied to the pole and don't get lost. You don't want those threads to get damaged, or even dirty, while transporting and storing them. -G ### ⭐⭐⭐⭐⭐ Works great on my EV ZXA1 sub, really solid and wobble-free *by T***. on January 7, 2019* Saw another reviewer used these on his EV ZXA1 sub, I followed their idea, and it worked like a charm. The plate on this is only about 1/4 larger in diameter than the inset for the factory installed cup flange. Since it was so close, airflow would be an issue if I just bolted this over. I bought a package of flat gasket material at the hardware store that was basically 1/8" rubber and cork sheets. I traced the flange onto those and stacked the gasket material up (rubber, cork, rubber) to completely fill the existing inset then cut a smaller center hole out of the middle of my gasket stack to make room for the threaded inset of this mount (looked like a donut). Buy high quality threaded t-nut inserts that you can bang into the inside of the box so you're threading bolts in to mount this to ensure a really tight fit. Just take the grill and woofer off, drill the holes, and hammer these nuts into the top of the case in each hole you drilled. You'll need to buy matching bolts that are about 1/2" longer than the ones you take out of the factory cup since this sits on top of the box surface. You can leave leave the woofer attached, the wire is long. Vacuum it out and bolt it all together. I bought an On Stage threaded sub pole and T pole connector so I can mount both my QSC C8's on top of the sub for a compact PA. Slick. ### ⭐⭐⭐⭐⭐ Perfect M20 Speaker adapter plate *by L***. on January 18, 2024* You can not go wrong with this M20 adapter plate. Perfect fit, quality build and the screws really secure the plate to the speaker. ## Frequently Bought Together - OnStage SSA20M Speaker Mount Adapter with M20 Threading, Black - Gravity SACC 35 B 35 mm Speaker Pole Cable Clips (GSACC35B) - On-Stage SS7746 Subwoofer Pole with M20 Thread (for Mounting a PA Speaker Above a Sub Cabinet, 1 3/8” Mount with Optional M20-Threaded Stem, 100 lb Capacity, Adjustable Height, Steel, Black) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/5288978-onstage-on-stage-ssa20m-speaker-mount-adapter-with-m20-threading](https://www.desertcart.co.uk/products/5288978-onstage-on-stage-ssa20m-speaker-mount-adapter-with-m20-threading) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-10*