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How to connect a Polk subwoofer to a soundbar: plug both in and look for a solid green light on the subwoofer, and if it flashes or stays dark, hold its sync button for a few seconds and pair from the bar.

Polk pairs the two at the factory, so most systems link on their own the first time.

When they don’t, the movie carries on with thin sound and the only clue is a subwoofer light that flashes or won’t come on.

The buttons depend on the model, because Signa, MagniFi, Command and React bars each pair in their own way.

Below are Polk’s own steps for each family, what the lights mean, and what to check when the subwoofer still won’t link.

Which Polk Soundbar Do You Have?

That model name decides which buttons you press, so check the box or the label on the back of the bar before you start. These are the steps Polk and its Australian distributor publish for each family:

Polk system On the subwoofer On the sound bar
Signa S1 and S2 Hold LINK or BAR SYNC on the back for 3 seconds Hold Bluetooth and VOL + together for 5 seconds
Signa S3 Hold CONNECT on the back for 3 seconds Hold Bluetooth and Volume Up together for 5 seconds
Signa S4 Hold CONNECT for 3 seconds or more Hold Bluetooth and + together for 5 seconds or more
MagniFi Max Hold SYNC for 5 to 7 seconds, after the bar Hold SYNC on the back for 5 to 7 seconds
MagniFi Mini Hold SYNC for 3 seconds Hold Bluetooth and Source together for 3 seconds
Command Bar Hold SYNC until you hear “Subwoofer paired” Hold SYNC until you hear “Entering subwoofer pairing mode”
React Bar Automatic, or hold SYNC for 5 to 7 seconds Automatic, or hold SYNC for 5 to 7 seconds

The table is the short version. The sections below add the order to do things in and what you should see at each step.

How to Connect a Polk Subwoofer to a Soundbar Automatically

Start by letting them do it themselves, because Polk’s guides say the two are already paired. The Signa S2 and S3 quick start guides say the sound bar and wireless subwoofer are preset at the factory to work together, and the S4 manual says they are wirelessly connected as the factory default.

So plug in the sound bar and the subwoofer, then turn the bar on. On the Signa S3, the POWER light on the back of the subwoofer turns solid green once the link is made (Polk).

The React Bar and its subwoofer take about 30 seconds, and Polk says to look for a solid green light on the back of the subwoofer (Polk).

If the light never turns solid, or the bass stops later, you pair by hand. Our guide to hooking a Polk soundbar up to the TV covers the other half of the setup, so start here only once the bar itself is playing the TV’s sound.

What Are the Pairing Steps for a Signa S1, S2 or S3?

Those three share one method. Polk’s quick start guides for the S2 and S3 give these steps, and Polk’s Australian distributor gives the same ones for the S1 and S2 (Westan):

Finger pressing the small pairing button on the back of a wireless subwoofer beside its green light
  1. Turn on your sound bar.
  2. Press and hold the pairing button on the back of the subwoofer for 3 seconds.
  3. Press and hold Bluetooth and VOL + on the sound bar together for 5 seconds.

The pairing button has a different name on each model. The S3 guide calls it CONNECT, the S2 guide calls it BAR SYNC, and the distributor’s S1 and S2 article calls it LINK, so look for the small button next to the subwoofer’s power light.

While the bar searches, its first and second lights flash on and off. They stop flashing when the two connect, and if they fail, those two lights flash together 5 times, so run the three steps again.

Which Buttons Pair a Polk Signa S4 Subwoofer?

The S4 uses the same idea with an extra signal, so the bar’s own light tells you when it’s ready. Polk’s owner’s manual says the two are connected at the factory, and gives these steps for when there’s no sound from the subwoofer:

Thumb and finger pressing two buttons together on top of a slim soundbar while its status lights glow
  1. Press the power button to turn the unit on.
  2. Press and hold the subwoofer’s CONNECT button for 3 seconds or more. Its status light blinks green, which means it’s in pairing mode.
  3. Press and hold the Bluetooth and + buttons on the sound bar for 5 seconds or more, until the bar’s status light blinks red.

Once the bar is in pairing mode, the subwoofer connects on its own. Polk says to repeat steps 1 to 3 if they don’t connect, and that the subwoofer’s status light should be lit green when they have.

How Do You Sync a Polk MagniFi Max Subwoofer?

The MagniFi Max leans on chimes, and the order is fixed. Polk’s support page says the whole process gets 2 minutes, and that the subwoofer must be synced before the rear speakers every time (Polk):

  1. Make sure the bar is on and the subwoofer is plugged in.
  2. Press and hold SYNC on the back of the bar for 5 to 7 seconds, until it chimes.
  3. Press and hold SYNC on the back of the subwoofer for 5 to 7 seconds, until it chimes, then release.

The same page then has you sync the rear speakers, and it says it doesn’t matter whether the left or right one goes first. If your rears are the ones playing up, our guide to how each brand pairs added speakers has the steps for Polk and others.

Pairing a Polk Command Bar or React Subwoofer

Both bars talk to you while they pair, which makes this the easiest method to follow. For the Command Bar, Polk’s steps are:

  1. Plug in the bar and the subwoofer.
  2. Hold SYNC on the back of the bar until you hear “Entering subwoofer pairing mode,” then release it. The SUB light above the button flashes green.
  3. Hold SYNC on the back of the subwoofer until you hear “Subwoofer paired,” which takes about 10 seconds.

For the React Bar, Polk says the subwoofer should pair by itself within about 30 seconds of both being plugged in. If it doesn’t, hold SYNC on the back of the bar and then the subwoofer for 5 to 7 seconds each, and Alexa confirms the pairing (Polk).

Reconnecting a Polk MagniFi Mini Subwoofer

The Mini keeps its buttons on the bar, which sets it apart from the larger MagniFi. Polk’s distributor gives these steps (Westan):

  1. Press and hold the Bluetooth button and the Source button on the sound bar together for 3 seconds.
  2. Press and hold SYNC on the back of the subwoofer for 3 seconds.

The green light on the back of the subwoofer flashes faster while the two connect, then stays solid green once they have.

What Do the Lights on a Polk Subwoofer Mean?

Those green lights are the subwoofer’s only status report, and they mean slightly different things on each model. Polk’s support pages and manuals give these readings:

  • Solid green: connected. Polk’s Command and React page says the solid green light confirms the subwoofer is paired to the bar.
  • Flashing green: waiting to pair. On the Command and React bars it means the subwoofer needs pairing, and on the S4 it means pairing mode.
  • Faster flashing green: the Mini is connecting to the bar.
  • Bar lights flashing together 5 times: on the S1, S2 and S3, the connection failed, so repeat the steps.

A subwoofer light that’s completely off points to a power problem, so check the cord and the outlet before you try to pair anything.

Why Won’t a Polk Subwoofer Connect?

If the steps run cleanly and the light still won’t settle, the wireless link is being disrupted. Polk’s support page for this problem blames interference from other wireless devices, and names Wi-Fi routers, cordless phones, baby monitors and wireless TV systems such as DirecTV’s Wireless Genie (Polk).

Wi-Fi router, cordless phone and baby monitor crowding a soundbar shelf and crossing its link to the subwoofer

Polk’s fix is to remove the interference, change the channel on the device causing it, and then sync the subwoofer again. The S4 manual adds two more checks for a silent subwoofer: clear anything standing between the bar and the subwoofer, or move the subwoofer closer, and keep both away from microwave ovens, wireless LAN devices and other Bluetooth devices.

If none of it works, Polk’s Australian distributor says to log a warranty case with the reseller you bought the system from, and Polk’s own support site has a Contact Us page.

Where Should the Polk Subwoofer Go?

Where the subwoofer sits affects both the link and the bass. The S2 and S3 guides say the best performance comes from placing it on the same wall as the TV, and the S4 manual says to put it on a flat surface near the sound bar.

Our advice on how subwoofer placement changes the bass covers the corner, wall and floor spots in more detail.

What If You Reset the Polk Soundbar First?

A reset can leave the subwoofer unlinked, and that’s the most common follow-up problem. The S4 keeps its subwoofer pairing through a reset, but that isn’t promised on every model, so run the pairing steps above if the light keeps flashing afterward.

Our Polk reset steps for each model list the buttons and what a reset erases.

Frequently Asked Questions

Why is my Polk subwoofer light flashing green?

Flashing green means the subwoofer isn’t paired yet, or that it’s waiting in pairing mode. Run the pairing steps for your model, and if the light stays solid green afterward, they’re connected.

How long does it take to pair a Polk subwoofer?

It depends on the model. Polk says a React Bar and subwoofer pair on their own in about 30 seconds, a Command Bar subwoofer takes about 10 seconds of holding SYNC, and a MagniFi Max sync has a 2-minute window.

Do I need the remote to pair a Polk subwoofer?

No. The steps for the Signa, MagniFi Mini, MagniFi Max, Command and React systems all use buttons on the bar and the subwoofer, and none asks for the remote.

Should I sync the bar or the subwoofer first?

On a MagniFi Max, you press SYNC on the bar first and then on the subwoofer, and Polk adds that the subwoofer must be synced before the rear speakers. On the Signa models, you hold the subwoofer’s button first and then the bar’s buttons together.