3.5mm TRRS vs TRS Adapter: When to Use Each
By Innov8 Wholesale Ltd | Published: 2026-10-19
Category: Comparisons
Understand the difference between TRRS and TRS 3.5mm audio cables and learn when to use a 4-pole to 3-pole adapter for your devices.
Quick Answer
Use a TRRS to TRS adapter when you need to connect a modern headset with a mic to an older audio input that only supports stereo sound, such as a desktop PC or a separate microphone jack.
Why the Number of Poles Matters
The main difference between a TRRS and TRS cable is the number of conductors inside the plug. A TRRS cable has four poles, which typically carry left audio, right audio, microphone, and ground. A TRS cable has only three poles, carrying left and right audio plus ground, with no dedicated microphone channel.
This means that if you plug a TRRS headset into a TRS-only jack, the microphone will not work, and you may hear audio only on one side. An adapter cable that converts TRRS to TRS solves this by re-routing the signals so the stereo audio is preserved while the mic signal is either ignored or sent to a separate input.
Where You'll Encounter the Problem
Many older laptops, desktop PCs, and audio interfaces have separate headphone and microphone jacks, each accepting a TRS plug. Modern smartphones, tablets, and gaming controllers often use a single TRRS jack for both audio and mic. When you want to use a TRRS headset with a TRS-only device, you need a 4-pole to 3-pole adapter cable.
On the other hand, if you are connecting a standard pair of headphones (TRS) to a TRRS jack, a simple TRS to TRRS adapter may be needed, but this is less common because most TRRS jacks are backward compatible with TRS plugs for audio-only use.
TRRS vs TRS: Trade-offs at a Glance
- TRRS to TRS Adapter: Use when your headset has a 4-pole plug but the device has separate headphone and mic jacks. This adapter sends stereo audio to the headphone jack and typically ignores the mic signal. If you need the microphone to work, check whether the adapter supports mic passthrough or use a splitter instead.
- TRS to TRRS Adapter: Use when you have a standard TRS headphone and want to connect it to a TRRS jack (like on a phone or laptop combo jack). This adapter usually just passes audio, with no mic support. For audio-only listening, a simple TRS to TRRS adapter works fine, but it won't enable a mic.
- Direct TRRS to TRRS Cable: If both devices have TRRS jacks, use a standard 4-pole to 4-pole cable to preserve both audio and mic. Avoid using a TRS adapter in this case, as it will drop the mic signal. Always match the number of poles when possible to get full functionality.
Product Spotlight
- 3.5mm TRRS 4 Pole Male to 3.5mm TRS 3 Pole Male Audio Cable 0.2m: This cable connects a 4-pole TRRS output to a 3-pole TRS input and features angled connectors on both ends. The angled connectors help fit in tight spaces and reduce strain on your devices, making it easier to connect a modern headset to older equipment.
3.5mm TRRS 4 Pole Male to 3.5mm TRS 3 Pole Male Audio Cable 0.2m
Which Option Fits Your Setup?
Best for
- Gamers using a TRRS headset with a PC that has separate audio and mic jacks
- Podcasters connecting a TRRS headset to an audio interface with TRS inputs
Not for
- Users with both devices on TRRS who should use a standard 4-pole cable
- Those needing mic passthrough, since a basic TRRS to TRS adapter may not support it
