Q1: Why do I hear noise through the speakers when switching to my headphones while both are connected?

A1: This device is primarily designed for headphone switching. It uses a passive circuit to support 4-pole interfaces (for microphone pass-through). When it's used with a speaker and the speaker is deselected, the speaker input is left in a "floating" state (unconnected/unfiltered). Because powered speakers are highly sensitive, this floating input can pick up interference, which results in the hum noise you hear. This is a characteristic of passive switching when used with powered speakers rather than headphones.

Q2: Is it compatible with TRRS headsets with a microphone?

A2: Yes, the selector can switch TRRS audio signals, including microphone input. However, you’ll need to use TRRS-to-TRRS audio cables (not included) for proper functionality.

Note: Mixing TRS and TRRS connections may cause your computer to prioritize the TRS signal and ignore the microphone input, as TRS devices are typically detected first. To ensure proper recognition, set the switch to TRRS before connecting the cable. Switching to a TRS device afterward may cause the issue to happen again. For best performance, we recommend using the same format—either TRS or TRRS—for both connected devices.

Q3: Can this switcher be used for both input and output switching?

A3: Yes, the selector supports bidirectional use. You can use it as either 2-input-1-output or 1-input-2-output, depending on your setup.

Q4: Does this work with smart devices like phones or tablets?

A4: Yes, as long as the device has a 3.5mm jack or is used with a compatible adapter. However, keep in mind that not all USB C adapters support analog audio passthrough.