SUB AMP FAIL
LG TV & Audio · S95QR 9.1.5 Channel 810W Soundbar with Meridian & Dolby Atmos
Wireless subwoofer contains its own amplifier and wireless receiver. If subwoofer amplifier fails, no bass output even when paired (LED shows connected). Check for burning smell. Subwoofer amplifier board accessible by removing bottom panel. Power supply issues (failed capacitors) can also prevent amplifier operation.
Error SUB AMP FAIL on the LG TV & Audio S95QR 9.1.5 Channel 810W Soundbar with Meridian & Dolby Atmos means: Subwoofer Amplifier Failure. The top-ranked community fix is “Replace Subwoofer Amplifier Board and Test Power Supply” (hard difficulty, ~120 min, DIY cost: $25-$40). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · soundbar
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many soundbar repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $200-$300.
Amplifier Board Failure
HDMI ARC Board Failure
HDMI ARC Connection Not Established
Soundbar Turns Off Unexpectedly
Bluetooth Pairing Failed
Sound Distortion at Volume
Unsupported Audio Format
All LED Indicators Blinking — System Error
The LG TV & Audio S95QR 9.1.5 Channel 810W Soundbar with Meridian & Dolby Atmos has 8 other known error codes:
Error code SUB AMP FAIL also appears on 2 other LG TV & Audio models:
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