The basic connection: wireless or wired

Most Vizio soundbars connect to a subwoofer wirelessly through a pairing process that takes about a minute. The subwoofer and soundbar communicate on a closed frequency so they don't interfere with your Wi-Fi or other devices. You won't need any cables between them — just power both units, put them in pairing mode, and they find each other automatically.

Some older Vizio models or budget soundbars use a wired connection instead, with an RCA cable running from the soundbar to the subwoofer. Check your soundbar's manual or the back panel to see which ports you have. If you see RCA jacks (red and white connectors) on the back of the soundbar, you have a wired model. If there are no audio output jacks, your soundbar is wireless-only.

Key Takeaways

  • Most Vizio soundbars pair wirelessly with their subwoofer by holding the pairing button on both units for a few seconds until lights blink.
  • The subwoofer must be powered on and within 30 feet of the soundbar during pairing, though they can be farther apart once connected.
  • If pairing fails, unplug both units for 30 seconds, plug them back in, and try again — this resets the connection without erasing your settings.
  • Wired subwoofers use RCA cables and require no pairing step, but you must match the red and white connectors correctly.

Wireless pairing step by step

Start with both the soundbar and subwoofer plugged in and turned on. Wait 30 seconds for them to fully boot up — you'll see lights on the front of each unit. On the soundbar, locate the pairing button. This is usually a small recessed button on the back or bottom labeled "Pair" or "Pairing." You may need a paperclip or pen to press it. On the subwoofer, look for a similar button, often on the back panel or bottom.

Press and hold the pairing button on the soundbar for about 3 to 5 seconds until you see the light blink or change color — usually to white or blue. Then when ready press and hold the pairing button on the subwoofer for 3 to 5 seconds. The two units will search for each other. Within 10 to 20 seconds, the lights should stop blinking and stay solid, which means they're connected. If the lights keep blinking after a minute, unplug both units, wait 30 seconds, plug them back in, and try the pairing process again.

Wired connection with RCA cables

If your Vizio soundbar has RCA output jacks on the back, you'll use a standard RCA cable to connect to the subwoofer. The cable has two connectors — one red and one white. The red connector carries the right channel audio, and the white carries the left channel. Plug the red connector into the red jack on the back of the soundbar, and the white connector into the white jack. Then plug the other end of the cable into the matching jacks on the subwoofer.

Once the cable is connected, turn on both units. The subwoofer should power on automatically when it detects audio coming through the cable. You don't need to do any pairing — the connection is when ready. If the subwoofer doesn't turn on, check that the cable is fully inserted into both the soundbar and subwoofer jacks, and that both units are plugged into working power outlets.

Adjusting subwoofer volume and settings

After pairing or connecting, you can control the subwoofer's volume. On most Vizio soundbars, there's a dedicated subwoofer volume control in the settings menu or on a physical dial on the back of the subwoofer itself. Start with the subwoofer volume at the middle setting, then use your soundbar's remote or app to adjust it up or down until the bass feels balanced with the rest of the sound.

If the bass is too loud and overpowers dialogue, turn the subwoofer volume down. If you can barely hear it, turn it up. The goal is for the subwoofer to add depth without making you notice it — you should feel the bass in action scenes or music, not hear it as a separate rumble. Some Vizio soundbars also have a bass boost mode in the app or remote menu. Try it with different content to see if you prefer it on or off.

Troubleshooting a connection that won't pair

If the subwoofer and soundbar won't pair after you've held both pairing buttons, the most common fix is a full power reset. Unplug the soundbar from the wall outlet and unplug the subwoofer. Wait 30 seconds — this clears the pairing memory on both units. Plug the soundbar back in first, wait 10 seconds for it to fully boot, then plug in the subwoofer. Wait another 10 seconds, then try the pairing process again.

If pairing still fails, check that the subwoofer is within 30 feet of the soundbar during the pairing process. Walls and large metal objects can block the wireless signal. Move the subwoofer closer to the soundbar, try pairing again, and once they're connected, you can move the subwoofer back to where you want it. If you're still having trouble after a reset and moving the units closer, consult your soundbar's manual for the specific pairing button location — some Vizio models hide the button in different places.

Checking your connection is working

Once paired or wired, test the connection by playing something with bass — a movie trailer, a music video, or a song with strong low-end. You should hear and feel the subwoofer kick in during bass-heavy moments. If you hear nothing from the subwoofer, check that the volume isn't turned all the way down on either the soundbar or the subwoofer itself. Some Vizio subwoofers have a physical power switch on the back — make sure it's set to "On" rather than "Standby."

If the subwoofer still doesn't produce sound, unplug it for 30 seconds and plug it back in. If it's a wired connection, make sure the RCA cable is fully seated in both jacks. If it's wireless, repeat the pairing process. After you've confirmed the subwoofer is working, you can fine-tune the volume and bass settings to match your room and your preference.

Frequently Asked Questions

Can I use a non-Vizio subwoofer with my Vizio soundbar?

It depends on the connection type. If your soundbar has RCA outputs, you can connect almost any powered subwoofer with an RCA input using a cable. If your soundbar is wireless-only, you'll need a subwoofer that uses the same wireless standard — most Vizio soundbars use a proprietary frequency, so a non-Vizio subwoofer may not pair. Check your soundbar's manual to confirm which subwoofers are compatible.

How far can the subwoofer be from the soundbar?

During pairing, keep them within 30 feet and in the same room with a clear line of sight. Once they're paired, the wireless connection usually works reliably up to 30 to 40 feet, depending on walls and interference. If you place the subwoofer in another room or very far away, the connection may drop. If that happens, move it closer and re-pair.

Do I need to pair the subwoofer every time I turn on the soundbar?

No. Once paired, the subwoofer and soundbar remember each other. They'll reconnect automatically the next time you turn them on. You only need to pair them once, or if you're connecting a different subwoofer to the same soundbar.

What if the subwoofer pairs but produces no sound?

Check the subwoofer volume dial on the back — it may be turned all the way down. Also check that the power switch is set to "On" and not "Standby." If the volume is up and the power is on, unplug the subwoofer for 30 seconds and plug it back in. If it still doesn't work, repeat the pairing process.

Can I connect two subwoofers to one Vizio soundbar?

Most Vizio soundbars are designed to pair with one subwoofer only. If you want bass from multiple locations, you would need a soundbar model that supports multiple subwoofers, which is rare in the Vizio lineup. Check your soundbar's manual to confirm whether it supports pairing with more than one subwoofer.