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Kill the Hum: Single Gang Subwoofer Wall Plate with Ground Terminal
Few things destroy an immersive cinematic sequence faster than a persistent, irritating 50Hz electrical hum vibrating through your subwoofer. This is typically caused by ground-loop interference when a high-powered subwoofer isn’t natively earthed at its mains outlet. The Single Gang Subwoofer with Ground Speaker Wall Plate by AV Installs is custom-engineered to solve this exact issue, combining an LFE channel with a dedicated grounding node for whisper-quiet audio performance.
£24.98
- Description
- Custom Speaker Wall Plates
- Q & A
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Description
Eliminating Ground Loops for Pristine Sub-Bass Control
1. Dedicated Ground Node Insulation
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The Benefit: Permanently drains stray electrical interference and hum by binding your subwoofer chassis directly back to your AV receiver’s ground loop system.
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Key Feature: A custom-engineered, heavy-duty front-facing grounding post securely clamps onto bare earthing wire or spade terminals.
2. Premium High-Conductivity LFE Path
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The Benefit: Delivers uninhibited low-frequency audio tracking while physically isolating the live signals from the grounding system.
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Key Feature: Combines a high-grade, gold-plated RCA phono coupler with an integrated rear threaded bar equipped with locking nuts for a secure grounding anchor.
3. Tailored to Architectural Finishes
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The Benefit: Technical utility meets high-end luxury design.
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Key Feature: Hand-built in the UK across nine premium decorative options—ranging from clean White or Black moulded plastic (recessed design) to custom metal finishes like Brushed Chrome, Polished Chrome, Brushed/Polished Brass, and Gun Metal Black. All our metal plates feature ABS plastic insulating bushes on the front with colour coding.
Technical Breakdown & Requirements
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Solderless Connectivity: Straight feed-through female RCA couplers on both sides, paired with a heavy mechanical screw-clamp terminal on the rear for the earthing line.
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Low Profile Integration: Comes packaged with a free 90-degree RCA right-angle adapter to safely route internal cables vertically within thin drywall pockets.
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Box Depth Specifications: Standard 86mm x 86mm UK single-gang size. Because it accommodates a grounding stem and locking nuts, we strongly recommend using a 47mm-deep single-gang back box.
Why Choose AV Installs?
With over 20 years of experience in audio installations, AV Installs offers professional audio engineering services. We design, manufacture and test all our speaker connection plates right here in the UK to ensure lifetime durability. If your project calls for custom additions like labelling or branding, we have you covered. Contact our design team today!
Are you a Trade Professional?
We regularly work with architects, builders, and interior designers. Contact us for technical drawings and trade pricing on 0800 669 6600 or contact us online.
Installation Tip
To keep the depth behind the plate to a minimum, you can purchase a subwoofer cable with right-angle heads. Or use the included gold-plated RCA adaptor.

At AV Installs, we manufacture all of our speaker wall plates here in the UK. We offer a wide range of standard speaker connection plates for most applications, plus custom services when needed. If you are looking for something not in our standard catalogue, or want to modify an existing plate, contact us for more details. Our friendly staff are always happy to help, and we have short lead times for custom orders.
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Single Gang Subwoofer With Ground Post Plate
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