Head-to-head · Best Soundbars Under $300

Samsung HW-B750D vs VIZIO M-Series 5.1 (M51ax-J6)

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Samsung HW-B750D comes out ahead by a narrow margin (4.6 vs 4.3). The gap is mostly about TV-room upgrades where a true 5.1 setup and a wireless subwoofer matter more than authentic Dolby Atmos — read the strengths below before deciding.

Higher ratedRanked #1 in Best Soundbars Under $300

Samsung HW-B750D

4.6

$280

The HW-B750D is RTINGS' top pick for under-$300 in 2026, and it earns it by being the only legit 5.1 system at this price tier. The wireless subwoofer and side-firing channels create a wider soundstage than 2.1 competitors can virtualize, and the Bass Boost and Adaptive Sound modes adapt the EQ to whatever you're playing. Trade-off: no native Dolby Atmos — but at $280 with a subwoofer included, that's a fair trade.

Strengths

— 5.1 channel system with wireless subwoofer included — only true 5.1 setup in this round-up
— Side-firing speakers widen the soundstage beyond what 2.1 competitors deliver
— DTS Virtual:X processing creates pseudo-height channels without upfiring drivers

Watch-outs

— No true Dolby Atmos decoding — relies on DTS Virtual:X virtualization
— Wireless subwoofer occasionally drops connection in larger rooms
— Build feels less premium than the Polk Audio Signa S4

$280 · Check Price on Amazon Full review →

Ranked #3 in Best Soundbars Under $300

VIZIO M-Series 5.1 (M51ax-J6)

4.3

$270

The M-Series 5.1 is the value crossover — full 5.1 channel layout plus virtualized Dolby Atmos/DTS:X at the lowest price among true 5.1 systems here. Vizio packed 9 drivers into the bar and includes a wireless subwoofer. The trade-off vs Polk Audio Signa S4 is that Vizio simulates height channels rather than driving them with upfiring speakers — fine for most movies, audibly weaker on aggressive Atmos mixes. Best buy when on sale below $250.

Strengths

— 5.1 channel layout with wireless subwoofer included
— Dolby Atmos and DTS:X support via virtualization
— 9-driver array with separate tweeters and woofers

Watch-outs

— Virtualized (not native) Atmos — height effects are simulated, not real
— 5" subwoofer is smaller than the Samsung HW-B750D's larger driver
— Vizio's software ecosystem (SmartCast) lags Samsung and Polk in features

$270 · Check Price on Amazon Full review →

How they stack up

Samsung HW-B750D

Only true 5.1 system in this lineup. Beats the Polk Audio Signa S4, Yamaha SR-B40A, Polk Audio Signa S2, and Vizio M-Series 5.1 on side-channel width but loses to the Signa S4 on real Dolby Atmos support. Closest competitor on price-per-channel-count is the Vizio M-Series 5.1.

VIZIO M-Series 5.1 (M51ax-J6)

Matches the Samsung HW-B750D on 5.1 channel count at a lower price. Loses to the Polk Audio Signa S4 on real (vs virtualized) Atmos. Beats the Yamaha SR-B40A and Polk Audio Signa S2 on channel count, which are 2.1 configurations.

Specs side-by-side

Spec	Samsung HW-B750D	VIZIO M-Series 5.1 (M51ax-J6)
Channels	5.1	5.1
Subwoofer	Wireless included	Wireless 5" included
Audio Formats	Dolby Digital, DTS Virtual:X	Dolby Atmos (virtual), DTS:X (virtual)
Connectivity	HDMI ARC, Optical, Bluetooth	HDMI eARC, Optical, Bluetooth
Side-Firing Speakers	Yes	—
Drivers	—	9-driver array

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