The Polk Audio SIGNA S2 is a straightforward 2.1 soundbar that comes with a wireless subwoofer. It has an excited, V-shaped sound signature that isn't the best-balanced we've reviewed so far. On the upside, it gets loud enough for most people, although it might not perform the best when pushed to its limits, as you might hear compression and distortion. On the upside, it's decently well-made and supports wireless streaming via Bluetooth.
The Polk Audio SIGNA S2 is a passable stereo 2.1 soundbar. It's a fairly good upgrade from your TV speakers when it comes to watching TV shows and listening to stereo music. However, due to its 2.1 speaker configuration, it doesn't have a great immersive listening experience with surround content and doesn't support Atmos, which is disappointing for movies.
The Polk Audio SIGNA S2 is very good for TV shows. Although it doesn't have a dedicated center channel, it's fairly well-balanced in the mid-range and it also features a dialogue enhancement feature to help make voices clearer.
The Polk Audio SIGNA S2 is a decent soundbar for music. This stereo setup comes with a wireless subwoofer that creates a lot of bass, although it has trouble creating very low-end frequencies for a deep rumble. The sound signature of this soundbar is rather excited and follows a V-shape with extra bass and excess in the treble range. This makes songs sound too boomy or too bright, depending on the track you're listening to.
The Polk Audio SIGNA S2 is sub-par for movies. It doesn't support Atmos so you won't be able to get height effects. On the upside, it can decode Dolby Digital content but has to downmix it to stereo to be able to play it, which doesn't result in a very immersive listening experience, and it doesn't support DTS.
The soundbar has a very straightforward design. It's mostly made out of plastic and there's a mesh-like fabric covering the front. The fabric is tighter than some other soundbars like the Yamaha YAS-207, but it could still rip or tear.
The subwoofer looks rather cheap. The materials used don't look premium and the small glossy plate around the front port looks fragile. The front of the sub is covered by a mesh panel.
The Polk Audio SIGNA S2 isn't too long and might fit between some 55" TV's stands. It's also rather slim and won't block the bottom part of your screen unless your TV sits flush on your table.
This subwoofer is rather small and doesn't take much more room than a typical desktop computer.
This system doesn't come with satellite speakers.
The back of the bar is very straightforward. You have the power input on one side and the other inputs on the other side. The soundbar has universal mounting holes if you want to wall-mount it.
The back of the subwoofer is very straightforward. Since its port is at the front, you only have the power cable running at the bottom of the sub.
The Polk Audio SIGNA S2 system doesn't have satellites.
The build quality of this soundbar is decent. Its fabric doesn't feel quite as durable as soundbars that have a metal grill protecting the drivers. The bar itself is mostly made out of plastic and there's a tight mesh fabric on the front. However, the subwoofer feels rather cheap. It's made from fragile-feeling melamine and doesn't feel very durable.
The stereo frequency response of the Polk Audio SIGNA S2 is decent. This bar has a rather excited sound profile that has a V-shape. The bar sounds either too boomy or too bright depending on the tracks you listen to. The small subwoofer creates powerful bass, but it doesn't get quite low enough for a good rumble.
The stereo soundstage of the Polk Audio SIGNA S2 is decent. This soundbar isn't particularly long, but its soundstage seemed a bit larger than the bar itself but not longer than a TV. On the upside, the focus of objects in the stereo soundstage was very good and they seem to be coming from a specific pinpoint and accurate location.
Update 09/21/2020: We've discovered a value input bug that would cause the Dynamics box results to be slightly off. All soundbars reviewed since January 30th, 2020 have been updated.
The Polk Audio SIGNA S2 has good stereo dynamics. This soundbar can get loud enough for most people, but cranking it up to its max volume might create noticeable compression artifacts.
The stereo total harmonic distortion performance of the Polk Audio SIGNA S2 is mediocre. You shouldn't notice anything at a normal listening volume, but when pushing the bar to its limits, there's a noticeable jump in THD throughout the range.
Due to being a 2.1 system, the Polk Audio SIGNA S2 has sub-par center channel performance. Since it doesn't have a dedicated center channel, it uses the left and right channels to create a phantom center. This doesn't sound as clear and natural as a dedicated channel, and this soundbar has a rather bass-heavy sound profile.
The Polk Audio SIGNA S2 has bad surround performance, but it's expected for a 2.1 soundbar. While it can receive surround sound signals, the bar downmixes everything to stereo to be able to play it. This results in a less immersive experience and sounds seem to be coming from in front of you rather than around you.
This soundbar doesn't support Atmos content. If you're looking for a 2.1 setup that can support Atmos content, check out the Sony HT-X9000F.
The Polk Audio SIGNA S2 has limited sound enhancement features. It lacks room correction, so it might sound differently depending on your room. On the upside, unlike the Samsung HW-T450, it has a dialogue enhancement to make voices clearer. It also has a night mode to uniformize the noise from different types of content, which is nice. There are also a few EQ presets for movies and music. If you would prefer a bar with more features and a built-in EQ, check out the 2020 Samsung HW-T550 instead.
This soundbar has fairly limited inputs. It only has a single HDMI ARC port, an optical input, and a typical 3.5mm audio jack.
Over its HDMI ARC port, the Polk Audio SIGNA S2 only supports Dolby Digital content. This should be more than enough for people who only watch content coming from streaming services or Blu-rays, as this is the most common audio format. However, some Blu-ray discs are DTS-only, which could be an issue if your favorite movie is one of those.
This soundbar doesn't have a Full HDMI port.
Unlike most soundbars, the Polk Audio SIGNA S2 doesn't support DTS over its optical port and can only play Dolby Digital content.
You can easily stream music, podcasts, or audiobooks from your phone or any smart devices via Bluetooth to the bar.
This soundbar doesn't support any of the high-end passthrough signals.
The subwoofer connects wirelessly to the bar and you have the pairing button at the back. The only connection that the subwoofer needs is a power cable.
The interface of the soundbar is rather barebones. There are only a few lights that change depending on the input you're on and they flash at different speeds when changing the volume. The lights become green when playing Dolby Digital content.
The controls on the bar are very straightforward. You can switch inputs, power the soundbar on/off, raise or lower the volume, and you also have a Bluetooth button.
The Polk Audio SIGNA S2 remote is very small and only has a few buttons. It's not a universal remote, so you won't be able to control other devices with it.
The Polk Audio SIGNA S2 doesn't have an app.
The Polk Audio SIGNA S2 goes into a standby mode after a few minutes of inactivity, although we don't have the specific timer. Also, it supports HDMI CEC, which means you'll be able to control some basic functions like power and volume with your TV remote when using the HDMI port.
The Polk Audio SIGNA S2 is a very straightforward system. Its 2.1 configuration is very simple and can be a good upgrade for your TV speakers. However, it isn't as well-built as some other affordable option in this price range like the TCL Alto 7+, but it performs decently well overall. For more options, check out our recommendations for the best soundbars, the best soundbars with subwoofer and the best budget soundbars.
The Polk Audio SIGNA S2 is a better soundbar than the Bose Solo 5. The Polk has a better overall sound and its dedicated wireless subwoofer provides more bass. It can get noticeably louder and supports audio formats over ARC. However, the Bose feels more premium and is shorter, which makes it a better option if you're looking for a compact soundbar.
The Polk Audio SIGNA S2 is a slightly better performing 2.1 setup than the Samsung HW-T450. While both bars have a similarly bass-heavy sound profile, the Polk can get slightly louder, but with more compression artifacts present. It also has an HDMI ARC input so it supports Dolby Digital, is center and surround performances are a bit better, and it has a dialogue enhancement feature. However, only the Samsung supports DTS via its Optical Audio In port.
The Samsung HW-T550 is a better 2.1 soundbar than the Polk Audio SIGNA S2. The Samsung has a better-balanced overall sound signature and it even has a 7-band EQ to let you customize the sound to your preference. It also has a full HDMI port, which the Polk doesn't have, and it supports DTS, which the Polk doesn't do. The Samsung also feels a bit more durable and has a lot more features.
The Vizio V Series V21-H8 and the Polk Audio SIGNA S2 are both 2.1 soundbars with similar overall performance; however, the Vizio has a few more features. The Vizio supports Dolby Digital Plus and DTS content, unlike the Polk. The Vizio also has more sound enhancement features, including a virtual surround mode. Also, it has a USB port and an additional AUX port for voice assistant speakers.
The Yamaha YAS-209 is a much better soundbar than the Polk Audio SIGNA S2. The YAS-209 has a better balanced frequency response and performs better with music. However, it doesn't get as loud as the Polk, but it performs way better at max volume. It also has a lot more inputs and supports more audio formats, on top of being able to play content via Wi-Fi.
The Polk Audio SIGNA S2 is a noticeably better soundbar than the Sony HT-S350. Its sound profile is better balanced, although a bit excited. However, it's not as well-built as the Sony. The Sony also performs slightly better at max volume, but its bass and detail-lacking sound signature might not be worth it for most.
The Yamaha YAS-207 is a better 2.1 soundbar than the Polk Audio SIGNA S2. Its sound profile is better balanced and is suitable for a wider range of stereo content. Its subwoofer also creates deeper bass and the bar creates a better overall phantom center channel. It also features a bit more inputs like a Full HDMI In port. On the other hand, the SIGNA S2 isn't entirely covered by mesh and feels a bit more durable.
The Polk Audio SIGNA S2 is slightly better than the TCL Alto 7+. It has a better stereo frequency response and a slightly wider-sounding soundstage. On the other hand, the TCL feels more robust and better-built. The Alto 7+ also has a better center performance, which might be better if you watch a lot of TV shows.
The Polk Audio SIGNA S2 and the Sony HT-X9000F are very closely performing soundbars but the Sony is more versatile. The Sony has a slightly better build quality, it has a better center and surround performance, and it can even support Atmos content, although it has to downmix it to stereo to play it. It also has a Full HDMI In port, so it can support eARC, DTS, and Dolby Atmos content. It can even passthrough high-quality signals. However, the Polk delivers a more punchy, boomy bass which can be adjusted, and it can get slightly louder with fewer compression artifacts.