The humble aux cable or, more formally, the 3.5mm auxiliary cable, has long been a universal standard for analog audio signals. Aux cables allow you to accomplish such tasks as plugging in your ...

The adapter also now offers aux input, allowing you to use it to stream music from your phone to a non-Bluetooth stereo via a 3.5mm jack. That makes it useful for pretty much every older car ...

Latest Bose Companion 2 Series III Multimedia Speakers - for PC (with 3.5mm AUX & PC Input) AU Deals: Bose Kicks Off It’s ‘Click Frenzy’ Event Today Offering Huge Savings Across Their ...

The WiiM Pro also contains additional inputs and outputs, including a dedicated digital optical input and a 3.5mm auxiliary input.

For example, there’s no longer a 3.5mm AUX input and speakerphone capability is gone. There are a few visual changes as well.

However, most Bluetooth speakers don’t have RCA inputs, they have a single 3.5mm AUX input. So you’ll likely need to invest in an inexpensive RCA to 3.5mm cable.

Summary Overall, all you need to do to hack in an auxiliary audio input, whether Bluetooth or otherwise, is to get your signal to the amplifier in the place of any other.