ITWO Splitter vs Koss Audio Adapter: Which to Choose
By Koss Stereophones | Published: 2026-10-18
Category: Comparisons
Compare the ITWO Headphone Splitter and Koss Audio Adapter (TRRS) to decide which adapter fits your audio-sharing or microphone needs.
Quick answer
Choose the ITWO Headphone Splitter if you need to share audio with two headphones or use a headset microphone on a computer. Choose the Koss Audio Adapter (TRRS) if you need to connect two standard TRS headphones to a single TRRS jack.
What each adapter does differently
The ITWO Headphone Splitter is a Y-adapter that converts a 2.5mm headset plug into two 3.5mm jacks, letting you use a mobile headset’s microphone on a computer. The Koss Audio Adapter (TRRS) does the opposite: it combines two 3.5mm TRS plugs into one TRRS jack, so two standard headphones can share one device output.
Both solve audio-sharing problems, but they target different hardware. The ITWO is built for headsets with a combined mic and audio plug; the Koss adapter is for standard headphones without a microphone.
Trade-offs at a glance
- ITWO Headphone Splitter: Best for using a 2.5mm mobile headset on a computer with microphone support. Not designed for sharing audio between two standard headphones.
- Koss Audio Adapter (TRRS): Best for connecting two standard 3.5mm TRS headphones to one TRRS source. Does not support microphone pass-through.
- Compatibility check: Check your headphone plug type (2.5mm vs 3.5mm) and whether you need microphone functionality before choosing. Measure your plug size and count the rings on the connector to confirm TRS or TRRS.
Product facts at a glance
- ITWO Headphone Splitter: The Y-adapter allows you to plug your mini 2.5mm MP3 or cellphone headsets into your computer and still use the headset microphone. If you have a mobile headset with a single 2.5mm plug, this splitter lets you connect both audio and mic to separate computer jacks.
ITWO Headphone Splitter - Koss Audio Adapter (TRRS): Koss Audio Adapter: 2 x 3.5mm female jack plug (TRS) to 1 x 3.5mm male jack (TRRS) plug. This adapter lets two people listen with standard headphones from one phone, tablet, or laptop that has a TRRS port.
Koss Audio Adapter (TRRS)
Which one fits your setup?
Best for
- Gamers or remote workers who need to use a mobile headset mic on a PC
- Anyone sharing audio from a single TRRS device with two standard headphones
Not for
- Users who need to connect two TRS headphones to a TRRS jack (choose Koss adapter)
- Users who need microphone support from a 2.5mm headset (choose ITWO splitter)
