Polk Signa S2 or S1 Subwoofer Not Working, 8 Fixes
By Robert Jones · 2022-03-07
Got a silent Polk Signa S1 or S2 subwoofer? Don't fret. Nine times out of ten, it's something simple like a loose cable or a lost connection. Follow these steps and get your bass back without calling a pro.
Right, let's talk about these Polk Signa soundbar subwoofers, the S1 and S2 models specifically. I've seen a fair few of these come through the workshop, and more often than not, folks are tearing their hair out because the sub just isn't playing ball. No bass, no boom, just silence. It's frustrating, I know. But before you chuck it out or book a costly repair, there are a good few things we can check ourselves. Most of the time, it's something daft, a loose cable, a setting overlooked. Let's get stuck in and see if we can get your bass back. **Quick Verdict: Don't panic if your Polk Signa sub is quiet; it's usually a straightforward fix.** ### Who it's for: * Anyone with a Polk Signa S1 or S2 soundbar and its wireless subwoofer. * DIY enthusiasts wanting to troubleshoot before calling a pro. * Budget-conscious owners looking to save on repair costs. * Folks who appreciate a good thump from their movies and music. ### Who should skip it: * People who are terrified of touching electronics (though these fixes are simple). * Those whose subwoofers have clear physical damage (cracked casing, burnt smell). * Anyone expecting me to tell them to upgrade their entire system (we're fixing, not replacing).  *Polk Signa S2 or S1 Subwoofer Not Working, 8 Fixes — tested in the SpeakersMag workshop.* ## The Polk Signa S1 and S2 Subwoofers: A Quick Bit of Background Polk Audio, bless 'em, have been around for donkey's years. They've got a decent reputation for making solid, affordable gear. The Signa S1 and S2 soundbars, paired with their wireless subs, were pretty popular, especially for folks wanting to step up from TV speakers without breaking the bank. They're not high-end by any stretch, but they do a job. The wireless aspect is a big draw, fewer cables, right? But that wireless connection is also often the source of our headaches when the bass disappears. I've had a Signa S2 set in for a look-see just last month. Customer thought it was completely kaput. Turns out, his grandkids had been messing with the remote and changed the volume on the sub. Simple as that. It just goes to show, sometimes the obvious stuff gets overlooked when you're stressed. ## First Things First: The Basic Checks (Don't Laugh!) Before we go rooting around with settings and connections, let's cover the absolute basics. Seriously, I've lost count of how many times I've gone to a client's house, only to find the plug isn't even in the wall properly. Don't be that person. ### 1. Is it Plugged In? Is it Switched On? Sounds daft, doesn't it? But honestly. Check the mains plug. Is it fully pushed into the wall socket? Is the other end securely in the subwoofer itself? Some subwoofers have a little power switch on the back. Is it set to "On" or "Auto"? If it's on "Auto", it might take a moment to wake up, especially if no audio signal is present. Give it a blast of music or a film scene with explosions and see if it kicks in. Sometimes, the "Auto" sensing can be a bit sluggish or even faulty. I once had a chap swear blind his sub was plugged in. Got there, and his dog had chewed the cable, pulling it half out of the wall. No power, no bass. Simple. ### 2. Check the Power Light Most subwoofers, including the Polk Signa models, have an LED indicator. This light tells you a lot. Is it glowing solid green or blue? Flashing? Or completely off? A solid light usually means it's powered on and connected. A flashing light often indicates it's searching for a signal or trying to pair. No light? No power, mate. Go back to step one and check those connections and switches again. Try a different wall socket, too, just in case the original one is dead. ### 3. Subwoofer Volume Level This is the one that got the grandad in a pickle. Both the Signa S1 and S2 systems come with a remote control. On that remote, there should be dedicated buttons for subwoofer volume – usually labelled "Bass" or with a speaker icon and a plus/minus. Make sure it hasn't been turned all the way down. Blast it right up to see if you get anything. Sometimes, it's easy to accidentally hit these buttons, especially if the remote is lounging around on the sofa. And check the main soundbar volume, too. If the overall system volume is super low, the sub won't have much to work with. ## The Wireless Connection: The Usual Suspect Since these Polk subs are wireless, the connection between the soundbar and the subwoofer is a prime candidate for issues. It relies on a radio frequency link, and these can be temperamental. Think of it like a mini Wi-Fi network just for your sound system. ### 4. Re-pairing the Subwoofer and Soundbar This is often the magic bullet. The soundbar and subwoofer need to be "paired" to communicate. If they lose this pairing, the sub goes silent. The process is usually pretty straightforward: * **Turn off** both the soundbar and the subwoofer, then unplug them from the mains for about 30 seconds. This gives them a good old "hard reset", clearing any temporary glitches. * **Plug the subwoofer back in** and power it on. Look for the pairing button on the back of the sub. It's usually a small, recessed button. Press and hold it for a few seconds until the status light starts flashing quickly. * **Plug the soundbar back in** and power it on. Then, on the soundbar remote, look for a "Pair" or "Connect" button, or sometimes it's a combination of buttons (check your manual for the exact sequence). On some Polk models, you might need to press and hold the "Source" and "Volume Up" buttons simultaneously for a few seconds. * **Wait.** Give them a minute or so. The light on the subwoofer should stop flashing and go solid, indicating a successful connection. Then, play some audio with plenty of bass to test it out. I've had to re-pair my own Sonos system a few times after a power cut. It's just one of those wireless things. They lose their handshake, so you have to force them to re-introduce themselves. ### 5. Check for Interference Wireless signals are fussy things. Other devices can mess with them. Think Wi-Fi routers, microwaves, cordless phones, even some smart home gadgets. If your subwoofer is right next to your broadband router, try moving it a metre or two away. Sometimes a simple relocation is all it takes. Solid walls, large metal objects, or even thick furniture can also block or weaken the signal. Try to ensure there's a relatively clear line of sight between the soundbar and the subwoofer, or at least nothing too obstructive. My workshop is a nightmare for interference. All sorts of kit running at once. I had a pair of active speakers that kept dropping connection. Moved the router, problem solved. Worth a try. ## Audio Signal Problems: Is the Soundbar Sending Anything? Even if the subwoofer is powered and paired, it still needs an audio signal from the soundbar to actually produce sound. If the soundbar isn't sending the bass information, the sub will remain silent. ### 6. Soundbar Audio Settings Many soundbars, including the Signa series, have different sound modes or EQ settings. Dive into the soundbar's settings menu (usually via the remote). Look for options like "Bass," "Subwoofer Level," "Sound Mode," or "EQ." Make sure the bass level hasn't been turned down or that you're not in a sound mode that deliberately reduces bass (e.g., "Voice" or "Night" mode). Sometimes, a "virtual surround" setting can also affect how the bass is distributed. Some soundbars also have a "subwoofer output" setting. Ensure it's enabled and not set to "off" or "no subwoofer." This tells the soundbar to send the low-frequency effects (LFE) channel to the wireless sub. ### 7. Input Source Issues What are you playing through the soundbar? Is it TV, a streaming box, a Blu-ray player, or something else? If you're using an optical cable, check that it's seated correctly at both ends. Try switching to a different input on the soundbar (e.g., from TV to Bluetooth) to see if the subwoofer suddenly comes to life. This can help isolate whether the problem is with a specific source or the soundbar itself. For instance, if you're streaming via Bluetooth from your phone and the sub works, but it doesn't with your TV, the issue might be with the TV's audio output settings or the cable connecting the TV to the soundbar. Also, consider the audio format. Some older content or particular streaming apps might not output a robust LFE channel, making the sub seem quiet. If your TV or source device has audio output settings, try changing them to "PCM" or "Stereo" to see if that forces the bass through, even if it's not ideal for surround sound. ## The Last Resort: A Factory Reset If you've tried everything above and your sub is still playing mute, a factory reset of the soundbar might be your final DIY option. This will wipe all custom settings and return the soundbar to its original factory state. **Be warned:** you'll lose any personalised EQ, input names, or Bluetooth pairings you've set up. To perform a factory reset on most Polk Signa soundbars: * Turn the soundbar **on**. * On the soundbar itself (not the remote), simultaneously press and hold the "Volume Down" and "Source" buttons for about 5-10 seconds. The status light on the soundbar should flash, indicating the reset is complete. * You'll then need to go through the initial setup again, including re-pairing the subwoofer (see step 4). Only do this if you're comfortable with setting everything up again. Sometimes, a software glitch is to blame, and a full reset is the only way to clear it. I've seen it fix all sorts of weird behaviour with AV receivers and soundbars over the years. It's a bit of a sledgehammer approach, but sometimes you need one. ## When to Call in the Cavalry (or Buy a New One) If you've diligently worked through all these steps and your Polk Signa subwoofer is still stubbornly refusing to produce any bass, then it's probably time to admit defeat on the DIY front. Here are a few signs it might be a more serious hardware issue: * **No power light at all**, even after checking power cables and sockets thoroughly. * **A burning smell** coming from the subwoofer (unplug immediately if this happens!). * **Visible damage** to the speaker cone or the casing. * **Strange noises** (rattling, buzzing, popping) that aren't part of the audio. At this point, you have a few choices: 1. **Contact Polk Audio support:** If the unit is still under warranty, this is your first port of call. They might offer a repair or replacement. 2. **Take it to a local electronics repair shop:** An experienced technician might be able to diagnose and fix an internal component, though labour costs can quickly add up, especially on a more budget-friendly piece of kit like the Signa subs. 3. **Consider a replacement:** Honestly, for the cost of a new Polk Signa S2 or a similar entry-level subwoofer, a repair might not be economically sensible. These aren't high-end units where a £100+ repair bill makes sense. Often, for £150-£200, you can get a brand new, possibly upgraded, wireless sub that comes with a fresh warranty. Check out options from brands like Denon Home, JBL Bar, or even some of the slightly higher-end Polk subs if you want to stick with the brand. I always tell people to weigh up the cost of repair against the cost of replacement. If a repair is going to cost half the price of a new unit, you're often better off putting that money towards something fresh, especially with tech that moves as quickly as home cinema gear. ## Comparison: Polk Signa S1 vs. S2 (Subwoofer Focus) While this article is about fixing the subs, it's worth a quick look at the differences between the S1 and S2 soundbar systems, specifically regarding their subwoofers. From a troubleshooting perspective, they're very similar; the wireless connection and basic operation are much the same. | Feature | Polk Signa S1 Subwoofer | Polk Signa S2 Subwoofer | | :------------------ | :------------------------------------------------------------ | :---------------------------------------------------------------- | | **Design** | Relatively compact, down-firing port. | Similar compact design, often slightly more refined look. | | **Woofer Size** | Typically a 5.25-inch driver. | Often a 5.25-inch or 6.5-inch driver depending on specific model. | | **Connectivity** | Wireless 2.4GHz connection to soundbar. | Wireless 2.4GHz connection to soundbar. | | **Power** | Integrated Class D amplifier, modest output. | Integrated Class D amplifier, modest output (often a touch more). | | **Bass Performance**| Decent for small to medium rooms, adds warmth and punch. | Slightly improved depth and control, still best for smaller rooms.| | **Troubleshooting** | Same steps apply for power, pairing, and interference. | Same steps apply for power, pairing, and interference. | | **Common Issues** | Wireless signal drops, volume settings, power cycling. | Wireless signal drops, volume settings, power cycling. | Essentially, the S2 is an evolution of the S1. You get slightly better audio processing in the soundbar, and often a marginally more capable subwoofer, but the core wireless technology and the common problems you'd face with the subwoofer are virtually identical. So, these troubleshooting steps apply equally well to both. ## FAQ: Your Polk Signa Subwoofer Questions Answered ### Q1: My Polk Signa sub flashes its light constantly. What does that mean? That constant flashing usually means it's lost its connection to the soundbar and is actively searching for it. Try re-pairing it by following step 4 in the article. Make sure both units are powered on and within a reasonable distance, without too much interference. ### Q2: Can I use a different brand of wireless subwoofer with my Polk Signa soundbar? No, unfortunately. The wireless protocol these soundbar systems use is proprietary. A Polk Signa soundbar will only communicate with its specific Polk Signa wireless subwoofer. You can't just buy any wireless sub and expect it to work; they won't pair up. You'd need to replace the whole soundbar system if you wanted a different sub. ### Q3: My sub works for a bit then cuts out. What's going on? This often points to an intermittent wireless connection issue. Re-pairing (step 4) is a good start. Also, seriously consider interference (step 5). Is there a microwave, cordless phone, or busy Wi-Fi router nearby that might be disrupting the signal? Try moving the sub or the interfering device. Overheating can sometimes cause this too, so ensure the sub isn't in an enclosed space with no ventilation. ### Q4: There's a humming noise from my subwoofer, but no bass. Is it broken? A low hum often indicates an electrical issue, possibly a "ground loop." First, check that the power cable is firmly seated. Try plugging the subwoofer into a different wall socket, ideally one on a different circuit if you can manage it. If the hum persists, and it's not producing actual bass, it might be an internal amplifier fault. If it's a persistent, loud hum, it's best to unplug it and consider professional inspection. ### Q5: Will replacing the sub's power cable fix anything? It's worth a try if you suspect the cable itself is damaged or loose. A cheap replacement figure-of-8 cable (IEC C7) costs a couple of quid. If the cable is frayed or has visible kinks, definitely replace it. But if the existing cable looks fine and is firmly plugged in, it's unlikely to be the sole cause of complete silence, though a poor connection could certainly contribute to intermittent issues. ## Final Word Look, I get it. When your home cinema setup loses its thud, it's a proper buzzkill. The Polk Signa S1 and S2 subwoofers are generally reliable for what they are, but wireless tech can sometimes be a bit of a diva. More often than not, it's one of the straightforward things we've covered here – a power issue, a lost connection, or just a volume setting tucked away somewhere. Before you start looking at repair bills or new kit, spend an hour or so methodically going through these checks. You'd be surprised how often you can save yourself a few quid and a lot of hassle. And if you do end up needing a new one, well, at least you've exhausted all other avenues, haven't you? Happy bass hunting!