Adapter SSQ SS-1820 — Jack Stereo 3.5 mm (female) to Jack Stereo 6.3 mm (male), Black

SSQ SS-1820 is a passive stereo audio adapter that converts a 3.5 mm female jack to a 6.3 mm male jack. It allows headphones, portable audio players or other devices with a 3.5 mm plug to be connected to amplifiers, mixers, musical instruments or other equipment with a 6.3 mm (1/4") input. The adapter has a compact, black housing and passes the stereo signal without amplification or active processing.

Advantages

The adapter provides a simple and reliable mechanical connection between two common audio connector sizes while keeping signal wiring straightforward for minimal loss. Its passive design requires no power, and the small form factor makes it convenient to carry in a gig bag, kit or pocket. The black finish is unobtrusive and suitable for both studio and stage use.

Suitable for

• Connecting portable players, smartphones or laptops with a 3.5 mm headphone output to amplifiers or mixers with 6.3 mm inputs
• Using 3.5 mm headphones with musical instruments or audio interfaces that accept 6.3 mm plugs
• Temporary or travel setups where a compact adapter is needed to bridge connector types

When it may not be suitable

This passive adapter does not provide impedance matching, signal amplification or balanced audio conversion. It is intended for standard unbalanced stereo headphone and line-level connections; it will not convert mono to stereo or provide microphone bias voltage for headsets that require TRRS wiring. For professional balanced connections or devices requiring active signal conditioning, a different adapter or active converter may be required.

Key specifications

• Connector A: 3.5 mm stereo (female)
• Connector B: 6.3 mm stereo (male)
• Function: Passive stereo signal passthrough (no amplification)
• Housing color/finish: Black
• Intended signal type: Unbalanced stereo headphone/line-level audio

How to use

Insert the 3.5 mm plug of your headphone or audio source into the adapter's 3.5 mm female socket. Then insert the 6.3 mm male plug of the adapter into the amplifier, mixer or instrument input. Ensure connections are fully seated to avoid intermittent contact. Use the adapter for standard stereo playback; avoid applying excessive mechanical stress or using it in wet environments. If a secure fit is required for prolonged stage use, check the connections periodically during operation.

What to consider before purchase

• Verify that your source uses a standard 3.5 mm stereo plug and the destination accepts a 6.3 mm stereo plug
• Confirm you do not need microphone bias, TRRS wiring, balanced conversion, or impedance matching
• Assess mechanical fit with the specific headphone plug and equipment input to ensure a stable connection

Usage recommendations

Use the SSQ SS-1820 adapter for straightforward, passive connections between 3.5 mm stereo outputs and 6.3 mm stereo inputs. For critical studio or pro audio tasks that require balanced signals, microphone support or active level conversion, select a purpose-built cable or active interface instead.