Short answer: the Polk MagniFi Mini AX. It ranks #2 of 16 soundbars with a subwoofer by sound quality, rated 3.6/5, at $499. The Polk Signa S4 ranks #10, rated 3.4/5, at $449, $50 cheaper, which does not close the gap in sound quality.
The case for the Polk MagniFi Mini AX: This tiny bar and its wireless sub sound far bigger than they look, and Wirecutter made it their top all-around pick after it beat larger bars in blind listening. It streams over Wi-Fi as well as Bluetooth, which the Polk Signa S4 cannot. The tradeoff: Height and surround are processed, so overhead effects are subtle.
The case for the Polk Signa S4: A full Atmos package with up-firing drivers and a wireless sub, so movies gain height and real bass weight out of the box. Watch for: The sound stays mostly in front of you, so surround effects are limited, and RTINGS found it only fair for music.
Buy the Polk MagniFi Mini AX. It is rated higher for sound quality, and the $50 you would save on the Polk Signa S4 does not close the gap.
Still deciding? The full TV Soundbars rankings cover every ranked option.
This tiny bar and its wireless sub sound far bigger than they look, and Wirecutter made it their top all-around pick after it beat larger bars in blind listening.
A full Atmos package with up-firing drivers and a wireless sub, so movies gain height and real bass weight out of the box.
Prices on this page were last checked November 2, 2026 at 11:36 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Polk MagniFi Mini AX | Polk Signa S4 | |
|---|---|---|
| Price | $499.00 | $449.00 |
| Ranked | #2 of 16 in Soundbars With a Subwoofer | #10 of 16 in Soundbars With a Subwoofer |
| App | No | No |
| Aux Input | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | - |
| Channels | 3.1 | 3.1.2 |
| DTS:X | Yes | No |
| Dimensions | 3.1”H x 14.4”W x 4.1”D (79 x 366 x 104 mm) | 2.4”H x 41.2”W x 3.7”D (60 x 1046 x 95 mm) |
| Dolby Atmos | Virtual (decodes Atmos, no up-firing drivers) | Yes (up-firing drivers) |
| Drivers | Bar: 5 drivers (2 x 0.75” tweeters, 3 x 2” mids); Sub: 5x7” down-firing woofer | Bar: 7 drivers (2 x 1” tweeters, 2 x 4.7x1.6” mids, 1 x 1” center, 2 x 2.6” up-firing); Sub: 5.9” woofer |
| HDMI Input | No | No |
| HDMI eARC | Yes | Yes |
| Included Subwoofer | Wireless, 5x7” driver | Wireless, 5.9” driver |
| Optical Input | Yes | Yes |
| Rear Speakers | Optional (Polk SR2) | No |
| Room Correction | No | No |
| Subwoofer Dimensions | 371H x 182W x 396D mm | 280H x 200W x 328D mm |
| Voice Assistants | No | No |
| Weight | 3.7 lbs (1.7 kg) | 6.4 lbs (2.9 kg) |
| Wi-Fi | Yes (AirPlay 2, Chromecast, Spotify Connect) | No |
| Subwoofer Weight | - | 4.1 kg |
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