Last Updated 5 hours ago
Filmmaking Dictionary: Number 6 / 6.35mm TRS / 1/4-Inch TRS
Definition
A 6.35mm TRS connector is a quarter-inch jack plug with three electrical contacts: tip, ring and sleeve. It appears on audio interfaces, mixers, headphones and other sound equipment. The diameter and contact arrangement describe the connector, not one guaranteed type of audio signal.
Depending on the device, the same connector shape can carry balanced mono audio, unbalanced stereo audio or a specialized connection such as an insert send and return. The socket’s label and the equipment’s wiring specification determine its function.
Balanced Mono and Stereo Are Different
In a typical balanced mono connection, the tip and ring carry complementary signal information while the sleeve provides the shield connection. The receiving circuit uses the difference between the signal conductors to help reject interference picked up along the cable.
On a typical stereo headphone connection, the tip carries left, the ring carries right and the sleeve is the common return. Although both use TRS plugs, they cannot be treated as interchangeable signal arrangements. An adapter that fits physically does not necessarily route the audio correctly.
Advertisement
Common Uses
- Balanced line input or output: One audio channel per TRS connection.
- Stereo headphones: Two listening channels through one plug.
- Insert connection: A device-specific send and return arrangement, often requiring a breakout cable.
- Patch connection: Routing that depends on the patch system’s design and documentation.
Practical Sound Example
A camera operator wants to feed a mixer’s balanced mono output into a recorder’s stereo input. A simple TRS-to-TRS cable may place the balanced signal legs on the left and right recording channels. Those channels can then cancel when summed to mono. The correct interface or cable must account for both devices’ wiring and operating levels.
Before a take, monitor the actual recorded channels and check a mono sum where relevant. A healthy-looking meter on each channel does not prove the connection will survive editing or downmixing.
Advertisement
Frequently Asked Questions
Is a quarter-inch TRS plug the same as TS?
No. TS has tip and sleeve contacts only. It is commonly used for unbalanced mono connections.
Does a TRS cable convert microphone level to line level?
No. Connector adaptation and signal-level conversion are separate jobs. Appropriate amplification or attenuation may be required.
Related Terms
Browse all terms starting with 6 or return to the filmmaking dictionary.