LG SN6Y 3.1-Channel 420W Soundbar System: problems, parts and running costs

Checked: 2026-10-29

Summary

The SN6Y is a 2020 LG 3.1 soundbar with a real center channel and a wireless subwoofer; it does not decode Dolby Atmos or DTS:X. Owners report the wireless subwoofer can drop out after about two years, and the HDMI path is HDCP 1.4 with a 1080p regional specification. It uses no subscription and no proprietary consumables, so running cost is electricity only, roughly $22.19 a year at the stated rates. A carefully tested complete unit is a strong value at $65-90, reasonable at $91-120, and only worth $121-150 in unusually clean tested condition; above $150 check newer alternatives.

Common problems and fixes

Subwoofer with no power or pairing LED — one owner reported no red or green power or pairing light after about 18 months. Try a known-good AC connection first, since no indicator at all is a different symptom from a blinking unpaired indicator. [12]
Bar nearly silent while the sub plays — one December 2021 owner reported all audio coming through the woofer with the bar inaudible despite a software update and reconnection, and a local shop quoted a $55 diagnostic fee. This is one anecdote, not a general amplifier defect. [13]
No Dolby Atmos or DTS:X — despite virtual surround marketing, the bar decodes Dolby Digital and DTS Digital Surround only, with no up-firing drivers; with no rear kit, effects project from the front bar. [1][8]
HDMI path is HDCP 1.4 / 1080p — the regional sheet specifies 1080p ports, so protected 4K HDR or Dolby Vision through HDMI IN is not promised; connect modern sources straight to the TV and use ARC or optical for audio. [1][4]
Bass-heavy but limited deep rumble — RTINGS heard a bass-heavy default with limited very-low bass and sometimes forceful center voices; EQ helps subjectively but cannot add missing extension. [8]
Rear-kit expansion is discontinued and cumbersome — the compatible SPK8-S kit needs a powered receiver and wires to both speakers, and secondhand kits may be incomplete or unpairable. [6]
Pairing can take several attempts — the official procedure is press PAIRING on the subwoofer until it quickly blinks green, then turn on the bar; solid green means linked. Keep the pair more than 1 m from routers or microwaves and test the link across cold starts before buying used. [11][5]

Parts and consumables

Remote control (AKB75595331) — $26.95 genuine from LG Parts USA; a non-OEM VINABTY replacement is $7.80 on Best Buy Marketplace; Remotes.net sells an SN6Y-specific replacement for $34.90. Replace on loss or confirmed failure, not on a schedule. [14][15][16]
Power adapter (DA-50F25 or MS-Z2000R250-050D0-P, 25 V DC at 2 A) — listed at $39.99 but sold out; match voltage, connector and polarity to the nameplate before buying. [5][17]
Wireless subwoofer (SPN5B-W) — a used listing asked $144.99 shipped and an untested unit sold for $67.49 plus $30 shipping; no confirmed available new LG-direct matching complete subwoofer at a published price. [5][21][22]
Optional rear kit (SPK8-S) — 2.0-channel, 140 W, compatible but discontinued; $179 at its 2020 launch, historical only. [3][6]
No routine consumables — no filters, pods, cartridges or subscription; remote batteries are ordinary alkalines. [1][5]

Yearly running cost

No subscription and no proprietary consumables. LG rates 38 W for the bar and 33 W for the sub when active and under 0.5 W standby each; 420 W is rated amplifier output, not wall draw. If it drew 71 W for four hours daily and 1 W for twenty hours standby, that is 110.96 kWh, or $22.19 at $0.20 per kWh. Actual draw depends on volume and utility rate; no prescribed service fee or documented typical lifespan was found. [1]

When it is a good buy

Discontinued: LG US direct shows no new order price and the 2020 MSRP was $399; Best Buy SKU 6402205 showed $100.99 clearance but is unavailable in new condition; B&H shows no new stock. Used listings include an eBay full system at $109.99 plus $59.28 shipping with no returns; a reseller-linked bundle at $82.97 with no remote or optical cable, cosmetic damage and a 30-day seller warranty; a soundbar-only unit sold for $67.99; and an OfferUp listing asking $200 near Atlanta. [3][9][10][18][19][20][23]

$65-90 — strong value for a tested complete unit with remote, sub and working HDMI/optical. [10][18][19]
$91-120 — reasonable if the seller allows meaningful returns. [18][19]
$121-150 — only for unusually clean tested condition with local pickup. [23]
Above $150 — check a new Hisense HS5100 5.1 at $179.99 with physical rears and center; LG’s newer S40TR 4.1 at $199.99 sale ($279.99 comparison) with rears but no physical center; or Samsung’s HW-B650F 3.1 at $249.99 promotional ($349.99 comparison) with a newer warranty. [24][25][26]

Named alternatives:

Hisense HS5100 5.1 — $179.99 at Best Buy, with a dedicated center, wireless sub and physical rear speakers; better for movies and rear surround if wiring and placement are acceptable. [24]
LG S40TR 4.1 — $199.99 LG US sale ($279.99 comparison), with rear speakers and wireless sub plus LG TV integration, but no physical center channel; better for rear effects and a newer warranty when center dialogue is secondary. [25]
Samsung HW-B650F 3.1 — $249.99 Best Buy promotional ($349.99 comparison), with a real center, included sub and modern HDMI TV integration; better for a new dialogue-focused system than an aging used SN6Y at a high asking price. [26]