Linking Bluetooth Chip Amps

If you’ve ever tried to build a stereo setup with small Bluetooth chip amps, you might have noticed that not all of them can be “linked” together to play in sync. Some amps are designed with this feature built in, but it’s not as common as people think.

Let’s clear up a few details.

Wuzhi Bluetooth Amps

The Wuzhi line of Bluetooth amps is one of the most popular choices for DIY boombox builders. They’re affordable, small, and sound surprisingly good for their size.
However, not all Wuzhi models can be linked together. The only ones that support linking are the ZK-1001B and ZK-1001U.

When you pair two of these, one amp acts as the main “host” and the other becomes the “secondary” or “slave” unit. Once linked, both amps will play the same Bluetooth audio in sync, giving you a true stereo or multi-speaker setup. Keep in mind that other Wuzhi amps, even if they look similar, don’t have this feature.

How to Link the ZK-1001B and ZK-1001U

The linking process is the same for both models and is done entirely through the volume knob.

Power on both amps, but don’t connect either to your phone yet.
Triple-press the volume knob (three quick clicks) on one amp. Its LED will flash to indicate that it’s searching for another device to link with. This amp becomes the host.
Triple-press the volume knob on the second amp as well. After a few seconds, they’ll find each other and pair automatically. You’ll usually hear a tone or see the LEDs change when the connection is complete.
Now connect your phone or Bluetooth source to the host amp. Both amps will now play the same audio in perfect sync.
To unlink them, triple-press the volume knob again or power one amp off.

This process works for both the 1001B and 1001U and doesn’t require any cables, apps, or additional hardware.

What is TWS?

You’ll often see the term TWS, which stands for True Wireless Stereo. It’s a Bluetooth feature that lets two audio devices connect wirelessly to create a left and right channel. In other words, one device plays the left channel, and the other plays the right.

Some amps call this “party mode,” where both devices play the same full signal rather than splitting left and right. TWS can be finicky depending on the Bluetooth chip used, so it’s best to check if your amp’s documentation specifically lists support for it.

Tinysine and Dayton Amps

Brands like Tinysine and Dayton Audio have taken this a step further. Tinysine’s Bluetooth modules can be configured for either TWS (left/right split) or Party Mode (both channels in sync). That flexibility makes them great for builders who want to chain multiple speakers together around a room or outdoor area.

Dayton Audio amps also support linking features on some of their models, especially those marketed for wireless whole-home or outdoor systems. Like Tinysine, they can be set to play together as a group, though each brand handles pairing and synchronization a bit differently.

Final Thoughts

If you’re planning a linked Bluetooth setup for your boombox project, make sure your amps actually support it. For Wuzhi, only the ZK-1001B and ZK-1001U can link together. Tinysine and Dayton give you more flexibility, especially if you want to play around with true stereo or multi-speaker configurations.