Audio Splitter Setup: Share One Source With Two Headphones

By Professional Headphones & Luxury Earphones | Master & Dynamic | Published: 2026-10-14

Category: How-to Guides

A practical step-by-step guide to setting up an audio splitter so two people can listen from one source, with connection tips and common mistakes to avoid.

Quick answer

Connect the splitter's single plug to your source, then plug each headphone into the two output jacks. Set the source volume low before you start, then raise it gradually. If one side sounds weak or silent, reseat the plug until it clicks or stops at the correct depth.

Check the splitter type before you connect anything

Audio splitters come in two common forms: a cable with one plug and two jacks, or a small block with one plug and two jacks. Both do the same job, but the cable version puts less strain on the source jack when the headphones are pulled sideways. If your source has a recessed or thick case, a cable splitter is usually easier to seat fully.

Match the plug to the source jack

Most splitters use a 3.5 mm plug, which fits phones, laptops, and controllers with a standard headphone jack. If your source has a 6.35 mm jack, you need a 3.5 mm-to-6.35 mm adapter rather than a different splitter. If your source has only USB-C or Lightning and no headphone jack, a passive splitter will not work; you need an active adapter or a source that still has an analog jack.

Set volume before the second listener joins

A passive splitter divides the same signal between two outputs, so each headphone receives roughly half the power. Start with the source at a low level, connect the first headphone, then the second. Raise the volume only after both are connected. If either headphone sounds thin or quiet, the source may not have enough output for two loads, and a small headphone amplifier between the splitter and the headphones can restore headroom.

Step-by-step splitter setup

Power down and set volume low: Turn off both headphones and set your source volume to about one-quarter. This prevents a sudden loud burst when the plugs seat. Checkpoint: source volume is low before any plug goes in.
Connect the splitter to the source: Push the splitter's single plug fully into the source jack. If your source has a case, remove it so the plug can seat all the way. Common mistake: a partially seated plug causes one channel to drop out.
Plug in the first headphone: Insert one headphone into either output jack. Play a test track and confirm you hear both left and right channels. Checkpoint: both channels are present before adding the second listener.
Plug in the second headphone: Insert the second headphone into the remaining jack. Ask the second listener to confirm they hear the same track clearly. Common mistake: mixing up input and output jacks on a block-style splitter.
Raise volume gradually: Increase the source volume in small steps until both listeners are comfortable. Stop if either headphone distorts. Checkpoint: no distortion at a comfortable level for both people.
Secure the cable run: Loop the splitter cable once and tuck it under the source or along a table edge so a tug on one headphone does not unplug the other. Next step: if one side stays quiet, add a headphone amplifier between the splitter and the headphones.

Product facts

Audio Splitter: The Master & Dynamic Audio Splitter is a part designed for use with the MG20 Wireless Gaming Headphones. It is offered in Black. If you own the MG20, this is the splitter made for that headset rather than a generic cable, so the plug and strain relief are matched to the headphone.