

🎬 Elevate your home theater vibes with Polk’s Signa S4 — sound that surrounds, clarity that commands.
The Polk Audio Signa S4 is a Dolby Atmos-certified 3.1.2 soundbar system featuring a 7-driver array and a 5.9-inch wireless subwoofer. It delivers immersive 3D surround sound with height channels, enhanced dialogue clarity via VoiceAdjust technology, and customizable bass through BassAdjust. Compatible with 8K, 4K, and HD TVs via HDMI eARC, it offers easy setup and wireless streaming with Bluetooth. Its ultra-slim design fits seamlessly in modern living spaces, making it a premium yet accessible upgrade for home entertainment.














| ASIN | B09J753M18 |
| Additional Features | Subwoofer |
| Age Range Description | Adult |
| Antenna Location | For Surround Sound Systems |
| Audio Driver Size | 5.9 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Latency | 16 Milliseconds |
| Audio Output Mode | Stereo |
| Best Sellers Rank | #2,572 in Electronics ( See Top 100 in Electronics ) #18 in Home Audio Sound Bars |
| Bluetooth Range | 10 Meters |
| Brand | Polk Audio |
| Built-In Media | Battery, HDMI cable, Optical cable, Power cords, Quick Start Guide, Remote control with batteries, Sound Bar, Subwoofer, Wall-mount spacers, Wall-mount template |
| Color | Black |
| Compatible Devices | Smartphone, Tablet, Television |
| Connectivity Protocol | Bluetooth |
| Connectivity Technology | Analog, Bluetooth, HDMI, Optical , USB |
| Control Method | Remote, Voice |
| Controller Type | Remote Control |
| Customer Reviews | 4.4 out of 5 stars 24,884 Reviews |
| Frequency Response | 20 Hz |
| Is Waterproof | FALSE |
| Item Dimensions D x W x H | 3.7"D x 41.2"W x 2.4"H |
| Item Height | 2 inches |
| Item Type Name | Sound Bar |
| Item Weight | 19 Pounds |
| MP3 player | No |
| Manufacturer | Polk |
| Model Name | Signa S4 |
| Model Number | Signa S4 |
| Mounting Type | Wall Mount |
| Number of Audio Channels | 3.1.2 |
| Number of Batteries | 2 AAA batteries required. (included) |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Processor Count | 1 |
| Speaker Maximum Output Power | 410 Watts |
| Speaker Size | 2.36 Inches |
| Speaker Type | Soundbar |
| Specific Uses For Product | home entertainment systems |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 15 Centimeters |
| Tweeter Diameter | 1 Inches |
| UPC | 747192135829 |
| Unit Count | 1.0 Count |
| Warranty Description | 3 Year Limited |
| Warranty Type | Limited |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology | Bluetooth |
| Woofer Diameter | 5.9 Inches |
D**E
This Sound Bar Is Great ! ( Real Reviewer )
I just bought a Sony X93L with Dolby Atmos capability. Not a cheap TV. I knew I wanted a sound bar system for my living room that would do it justice. I looked & listened to sound systems by Sony, Bose, Sonos, Samsung, LG, Visio to name a few. Im a child of the 70s and grew up through the old school speakers with LOUD & LARGE surround sound home theater set ups. I love hearing all the small details around me. If i had unlimited cash I'd spent few grand on one of those systems. But i don't have that kind of money .... really I don't need that much sound system in my living room. I wanted a sound bar that would give separate bass and separation of some left and right and center channels and sound solid for movies, music and dialog. I didn't want a cheap sound either. When I listen to the brands i named before i honestly wanted to be impressed .... but just wasn't. It sounded good but many with a bar and sub together would be at least a $1000. Some much more. I came across this Polk Signa S4 and read the reviews. Polk has made solid sound for a long time. I took a chance and I'm glad i did. This sound bar is GREAT ! The build is very nice and solid. Remote is small and plastic but has very usable buttons especially the separate sound and bas volumes. Set up was fast, all needed cords included. It has very excellent center voice clarity. The other channels are distinct and create a wall of sound that "reaches out in to room before your TV and shifts left, right and up and down". It sounds really good and when your add the sub the bass flows in well but is also distinct and can be adjusted easily with the remote. If you want some bass rumble for those movies or thump for concert bass lines it can do it well. Is this system a full surround 7.1 plus sound experience? NO ! But you can really hear the shifts in channels reaching out in front of you from the array of speakers projection left, right, center and up. I personally found the bass in the front to the side of the bar by the TV is really good. But for me i placed the sub woofer behind me and got some really nice "surround like" feel that pulled all those sound bar channels all together to a more full room experience. Im totally satisfied and recommend this system. The price was $299 vs $1000 plus for some of the others. Amazon offered me a $200 gift card to sign up for their credit card making this sound bar cost $100. I was sold at $299 but at $100 it was a steal. Try it .... its a great living room system with Great value for the price. I Love It!
H**R
JUST GET IT ALREADY, you'll love it.
I got the S4, if you're teetering back and forth just stop, get it. GET IT NOW! I love it, I think you will too. Don't get me wrong, this thing is not so amazing that the walls our going to vibrate it's gonna sound like a concert in your home; no soundbar out of a box is going to do that. If you want that effect, prepare to fork out four digits on a system with superheavy speaker magnets and an independent amplifying system. What sets this apart is the clarity and simplicity, not to mention quality. And btw, it is loud enough to piss off any inhabitants in the same dwelling or sharing the same walls as you. Here's what I had to do to set it up, I opened up the box put the batteries in the remote, plugged the power cord of the soundbar to the wall outlet, did the same for the subwoofer, turned on the soundbar, activated the Bluetooth on the soundbar, pressed the button on the back of the subwoofer for it to connect to soundbar, got the tv to check for any Bluetooth items nearby and it saw the S4 immediately and I selected it on the screen. VOILA, the system was set to go. Seriously, that easy, 5 min! For basic sound, my tv remote was able to function the volume automatically. Now basic functions for the remote that comes with the soundbar, this is everything you'll need to know about controlling the sound: There's the volume up and down and there's the bass up and down, pretty basic. There's three available preset eq's set up (each of those buttons has icons). 1- movies/cinema, 2- night mode (which controls the highs and lows for a steady volume and tone, that's to avoid pissing off others late at night), and 3-Music mode. That's it, it's not like a fancy equalizer or amplifier, that's all the control you get. At the very bottom of the remote you'll see buttons with the numbers 1, 2 and 3. That's basically treble, it control voice clarity. If you're having trouble understanding what people are saying just take it up to 2 or 3 and voices are louder and more clear. And that's it! Now, if you want to get fancy, you can put it on a bracket and attach it to the tv (which, I did) or there are two holes already provided on the back to mount it to the wall with screws. It does come with HDMI and optical cable if you want to hard wire it to your tv, but hey, I'm happy with the Bluetooth; only cables I had to deal with are the power cords for the bar and the woofer. It's choice! Stop fidgeting, for the price point, get it!
D**N
Nice With A 2020 LG TV
My first soundbar! This is definitely a big improvement in sound (volume, clarity and bass) over what were already pretty nice sounding built in television speakers which I listen to at about volume level 9 (of 100) for casual daily YouTube videos. I can bring it to level 13 when wanting to be more immersed in Netflix and such. I don’t need much volume in my home (though in my car I have a 12” subwoofer and play music at 75% volume LOL). VOLUME: The sound bar can get much louder and with that extra volume it stays more clear without being distorted unlike the built-in television speakers that start to sound distorted when it gets 50% and above in volume. REMOTE CONTROL: This soundbar CAN be controlled with my TVs remote so long as it’s connected not just with the optical audio cable but the HDMI cable as well going into an ARC HDMI port on the tv. The soundbar turns on when I turn on my tv and turns off when I turn off my tv. I don’t see a volume level on the soundbar which is my first complaint about the soundbar. It’s also not on my tv when using the soundbar. I just see a + or - on the tv when I press those buttons. EQ (ISSUE 1): Sadly there is no real EQ settings on this. There are several buttons on the REMOTE ONLY (not on the soundbar itself) that have 6 custom sound settings: Movie, Night, TV, voice 1, voice 2 and voice 3. I’m not sure if you can combine these. I switched to “night” and then “voice 3” thinking that maybe it would simply enhance the voice on night mode but when I press night mode again it resets the voice setting. So I think it’s either or. And as a 7th choice you have your bass volume. Thats the extent of EQ options. When using the built in speakers the TV had tons and tons of options with 5 frequency sliders (for sub bass, bass, mids, high mids and treble), surround sound, magic sound, add bass, add treble… so much. That’s all greyed out when using the optical audio out to this soundbar. I don’t know if all of those settings would still be there if I got an LG sound bar with my LG television. But considering I don’t know what brand of television will be my next, I couldn’t worry myself with matching the soundbar brand. So far, I guess it doesn’t matter that there aren’t as many EQ settings, the speaker sounds pretty good as is. I leave it on “Movie” for everything. I have my Apple Music hooked up on the television but haven’t used it for music yet, I presume I would want to put the soundbar on the music setting for that. ISSUE 2: I am not sure is an issue with the speaker or the television but when watching YouTube for example, if you are on the YouTube menu, there is no audio signal being sent to the speaker and thus you see single white dot of light. When you have clicked on a video and the audio signal is sent to the sound bar, the single white light turns green. The PROBLEM is that there is a fraction of a delay after the video has started before the sound starts on the speaker. There are many videos I watched that for some reason has someone speaking from the very first frame of video and the sound bar always misses it, the sound turning on 1-2 words late into the video. It has nothing to do with speaking specifically, whatever the sound is in the video, the speaker doesn’t activate until a fraction of a second after the video starts. It’s a bit jarring, and a little more annoying. If I rewind the video to the beginning I’m just repeating the situation because rewinding means there is no audio signal going to the speaker and so I see the white dot again, that once again doesn’t turn green until a fraction of a second after the video starts again. But aside from those issues, it really does sound good and I haven’t felt a need to crank up the base much because it sounds pretty full as is, without sounding too bassy or muffled. I experimented with the voice enhancement buttons. I’ve settled on “voice 2” to bring just a little bit more clarity and audibility to the voices when I have the volume a bit lower so as not to disturb others. It sounds good, I can make it louder than ever before if I want. I can control its volume and on/off without needing its remote (though I need its remote for the other EQ settings). I got it “open box” but it looked brand new I must say for $143.80 which is a good price for what this is. And I trust the Polk brand.
R**B
Easy to setup, easy to use, great sound
This relatively low cost sound bar has remarkably good sound for such a low profile. Setup was easy. It came with HDMI and optical cables for attachment to the TV. I attached the HDMI to the ARC (Audio Return Channel) HDMI connection of my flat panel and just turned it on. The TV recognized the sound bar by turning off its internal speakers and playing sound through the sound bar. Additionally, it shows the audio level bar on-screen whenever the TV or sound bar remotes are used to adjust the audio level. I plugged in the wireless subwoofer and it connected automatically to the sound bar, but there is also a manual process if necessary. It is also easy to use. There are various adjustments that can be made with the sound bar remote, but once these were made we only use the TV remote. The sound bar appears to go into sleep mode when the TV is off and comes back on when the TV is turned on. It is compatible with Dolby 2.1 content, but it cannot be upgraded with additional speakers. There are five inconspicuous buttons on the top of the sound bar: on/off, source selection, Bluetooth on/off, volume down, and volume up. Bluetooth is used for playing sound from other sources like a smart phone. These buttons also appear on the sound bar remote along with other buttons for mode selections. There are three sound buttons: Movie, Night, and Music. We use the Movie mode mostly as it “expands” the soft and loud sounds as if in a movie theater but with 2.1 speakers. The Night mode “compresses” the sound levels, making “quiets” a little louder and “louds” a little lower. This mode is good for late night listening with the sound turned down so that others aren’t disturbed by loud explosions and you can still hear the “quiet” portions. The final sound mode, Music, is for listening to music with the frequencies set at a more equal distribution. There are also three buttons for Voice Adjustment. These adjust the voice frequencies to make voices easier to understand. At the highest level, number 3, we can tell that voices are much clearer but they sound somewhat unnatural. Consequently, we normally use level 1 and occasionally level 2 when necessary. There are a series of lights on the front screen to indicate operation and when modes are selected. The main light comes on when the sound bar is in operation and goes off when it goes into sleep mode. This is a soft light and I do not notice it when watching the TV. The color changes whenever the Dolby 2.1 signal is received and being used. Other lights on the front will turn on momentarily whenever a new mode or source is selected to indicate that the signal has been received and the change made. There is also a light that comes on when Bluetooth is turned on. This goes off when Bluetooth is turned off or when Bluetooth goes into sleep mode if it is not in use for more than 15 minutes. Note, the auto sleep mode is not the default and this option has to be manually selected to be in use. This sound bar produces much better sound than the TV speakers and requires little attention once the adjustments are set; we mostly use the TV remote. My only criticism regards adjusting the subwoofer levels. The subwoofer has bass minus and plus adjustment buttons on the remote but, unlike the other mode adjustments, there is no visual indication that anything is happening when this is used. There isn’t even an indicator that it is wirelessly linked except for the lights used when manually connecting it. The bass can be adjusted up to the point that deep voices and drums rattle items on the shelves in the room. When adjusted down to reduce such rattles we have no way of knowing if we are at a mid or lowest level. The bass can be adjusted to what is being listened to, but it would be nice to know the actual setting so that a “standardized” level could be selected for particular circumstances.
D**O
Polk Audio Signa 4 Sound Bar
This has to be the easiest equipment I've ever installed. It's basically plug and play. I've never had such an easy task of installing audio equipment. Even the subwoofer. It was probably the easiest. After connecting the sound bar (HDMI & power cable), I connected the subwoofer to power, and it automatically linked itself to the sound bar. The Sound quality is amazing too, which is one of the reasons I chose this one. The reviews are exactly as I thought. I've heard both Sonos and Bose, and you can't beat the Polk Audio soundbar for the price. Super pleased with my purchase. I would definitely recommend it to anyone.
A**X
Plug & play with stellar sound.
I recently upgraded to this system after moving from a REALLY old 5.1 virtual surround Sony amplifier/soundbar. It's my first experience with DTS:X/Atmos and I'm impressed for the cost. Probably the most stand out feature by far is the voice amplifier; we've all played shows/movies where the vocals are either too soft or too loud, this always makes voices crystal clear even in quieter movies or action packed scenes with movies; I'd always have to play with subtitles, especially older titles as you'd often have to increase the audio to hear anything. This feature does a great job of amplifying vocals without blowing up the other audio. It's also truly plug and play. While there's no EQ adjustment, it sounded great out of the box. I personally just increased the bass a bit. Now on to Atmos/Virtual DTS. Compared to my decade old Dolby audio soundbar, it does an admirable job "virtualizing" sound from left/right/above you. Is it going to perform as well as a true 3.1.2 system with dedicated speakers? No! However for a bedroom or something it's just about perfect. It has simple indicators that tell you if something is playing through Dolby/DTS (green) Atmos (cyan) and stereo. (blue) Depending on your source (Netflix, or supported show, it will adjust automatically to the highest available output) It's a shame the virtual technology hasn't really improved that much from a decade ago, but really you're never going to get that "true" surround sound experience without multiple speakers. For smaller spaces, apartments, etc, it's going to perform very well. For large entertainment rooms, you'd be better off with true multi speaker setups. With that said it's very loud. I keep it around 20/100 for a master bedroom. I could see it filling a larger space very easily if needed. It also "upscales" most stereo sound from older movies/shows to Dolby which is a nice touch. (Although not a novel feature, basically just levels the audio) Polk always delivers high quality audio, just don't expect a true "theater" experience with just a soundbar and subwoofer.
T**G
Good entry level sound bar.
Everything you need for a small room. Polk audio is a good brand to begin with. The ease of set up was great. I had to use the optical cord, as my Roku took up my arc. Once the tv was convinced (we had an argument) I was using the optical plug, I played with the settings. The only thing I couldn't do was get my remote to work with it. I'm sure being 70 yrs old and not new tech savvy is the problem. The sound is outstanding for this smaller, entry-level sound bar. I can adjust the voice level, the bass is booming if you want. Now if the quality is that of Polk audio, it should keep me happy for a long time. I recommend this product.
C**S
Not Recommended For PC
I bought this soundbar to set up under my ultrawide screen on my PC in 2022. I've had constant annoyance with this soundbar since then and it's 2024 now. I originally set this up using an optical cable directly to my PC. Originally, I would start to notice odd volume differences between games or between sessions. I thought it had to have been an issue with the way I had audio configured on Windows or in the individual games. But, I ruled that out when I had a particularly bad audio session where it sounded like all the channels were off and I was only hearing audio from one channel. I simply unplugged the optical cable and plugged it back in and the audio was perfect again. After that I switched from optical cable to 2.5mm Aux cable and I haven't had that issue since. That could have been an issue with my motherboard's optical port. I don't know. But, then I started to notice the sub problem. If I'm being honest, I didn't realize this whole time that the bass of the subwoofer was cutting in and out. I'm not sure exactly when I started to notice it, but once I did, I couldn't stop hearing it. It happens so frequently and intermittently that it's hard to tell at first I guess. But that's the biggest issue and once you notice it, it becomes extremely annoying. Over the last year or so I've half-heartedly attempted to look up the problem. It's taken this long for me to actually do something about it because I often use headphones instead. Looking it up, there's a few discussions specifically about the Signa S2 and subwoofer cutting in and out. I'll save you the trouble of having to look too far. They usually say it has something to do with wireless interference. I can tell you as of today that's definitely not the case for me. Admittedly, I have multiple network devices (Modem/Router combo AND a secondary Router). Both devices have wireless with both 2.4Ghz and 5Ghz bands. But I have the wireless disabled on both of those devices. My PC has onboard wireless with again the same bands. Everyone says it's the 5Ghz band and that by disabling it, it fixes the problem. First, no one should have to do that. I have my sub RIGHT next to the soundbar. There's nothing between them. But regardless of all that, today I disabled everything. There was no wireless signal from any device in or around my PC (including Bluetooth). The subwoofer was still cutting in and out. I tried multiple times using the sync button and forcibly reconnecting the subwoofer to the soundbar using their pairing method over the years. Nothing fixes this subtle cutting in and out. So I'm done. As of today, I'm moving on. I'm in the middle of narrowing down on a couple of integrated bass soundbars to avoid any possibility of other wireless devices somehow interfering with my audio device. To be perfectly honest, in this day and age, that just shouldn't be happening anymore. It's a reminder of the old days of 2.4Ghz wireless house phones interfering with wireless routers causing disconnects on your gaming sessions. It's just makes me wonder what were they thinking? Hopefully this helps anyone else thinking about trying the same thing to avoid the same mistake I made.
Trustpilot
3 days ago
3 weeks ago