Free Delivery on all orders over £99*

QTX 3.5mm Stereo Jack Coupler - Female to Female

£149
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
We are an Independent UK Company
Price match. Found it cheaper? Contact us
Trade Discount Available
Description

The QTX 3.5mm stereo jack coupler is a back-to-back inline adaptor with female 3.5mm sockets at both ends, designed to join two 3.5mm male jack cables together. The coupler passes three-conductor (TRS) signals, making it suitable for both unbalanced stereo audio connections and balanced mono signals where left and right channels carry signal and return on a common ground.

Commonly used to extend headphone cables, link portable audio devices to speakers, or patch studio monitoring setups where the existing cable run is too short. The coupler maintains the stereo signal path without requiring soldering or rewiring, and the compact inline design minimises the physical footprint of the join. Both sockets are wired identically, so the coupler has no directional orientation.

The metal body provides mechanical strength at the join point and shields the connection from RF interference. The coupler sits flush when two 3.5mm male plugs are inserted, with no exposed connectors or loose housing. QTX manufactures the coupler to standard 3.5mm TRS dimensions, ensuring compatibility with consumer headphones, portable audio players, mixing desks, and most studio monitoring equipment using 3.5mm connectivity.

Frequently Asked

Does it work with stereo headphones?

Yes. The coupler passes all three conductors (left, right, ground) so it maintains stereo signal when joining two stereo 3.5mm cables. It works with standard consumer headphone cables, auxiliary audio cables, and TRS patch leads.

Can it be used for balanced mono audio?

Yes. Balanced mono signals use the same three-conductor TRS configuration as unbalanced stereo, with tip and ring carrying the positive and negative signal phases on a common sleeve ground. The coupler passes this configuration without modification.

What's the difference between this and a mono coupler?

A mono coupler typically uses two-conductor (TS) wiring and only passes tip and sleeve. This stereo coupler uses three-conductor (TRS) wiring and passes tip, ring and sleeve, making it compatible with stereo and balanced mono signals. Using a mono coupler on a stereo cable results in loss of one channel.

Does it degrade audio quality?

The coupler introduces a physical join point, which adds a small amount of contact resistance compared to a continuous cable. For typical consumer audio and short to medium cable runs, this is negligible. For professional studio use over long cable runs or high-impedance sources, a soldered join or purpose-made extended cable may be preferred.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

See it lit, in person

Lighting looks different in a real room. Come and see our range at our showrooms in Birmingham, Hong Kong and Dubai, or talk to our design team wherever you are.

Niori lighting showroom trailer video with closeups of alabaster lighting

Why Niori

Over 20 years lighting homes worldwide

We are a specialist lighting and mirror retailer with showrooms in Birmingham, Hong Kong and Dubai, shipping to customers around the world. Our own design team is here to help, from first idea to final fitting.

Genuine products

An authorised stockist

Every product arrives brand new with the full manufacturer warranty. Found it cheaper elsewhere? Ask us about a price match.

Ordering with us

Free delivery over £99

Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

Design help

Not sure what you need?

Our design team can help you plan your lighting, share photos and videos of stock, and send samples worldwide. Book a showroom visit in Birmingham, Hong Kong or Dubai, or ask about our lighting design service.

You Might Also Like

Recommended For You

    Our Reviews

    From first click to final installation, our customers share how Niori lights up their spaces. Read their words and envision what’s possible for yours.

    Featured Projects

    Step into our portfolio and see how we transform homes, restaurants, and commercial spaces and more, worldwide. Click here for a closer look at our latest projects.

    Description

    The QTX 3.5mm stereo jack coupler is a back-to-back inline adaptor with female 3.5mm sockets at both ends, designed to join two 3.5mm male jack cables together. The coupler passes three-conductor (TRS) signals, making it suitable for both unbalanced stereo audio connections and balanced mono signals where left and right channels carry signal and return on a common ground.

    Commonly used to extend headphone cables, link portable audio devices to speakers, or patch studio monitoring setups where the existing cable run is too short. The coupler maintains the stereo signal path without requiring soldering or rewiring, and the compact inline design minimises the physical footprint of the join. Both sockets are wired identically, so the coupler has no directional orientation.

    The metal body provides mechanical strength at the join point and shields the connection from RF interference. The coupler sits flush when two 3.5mm male plugs are inserted, with no exposed connectors or loose housing. QTX manufactures the coupler to standard 3.5mm TRS dimensions, ensuring compatibility with consumer headphones, portable audio players, mixing desks, and most studio monitoring equipment using 3.5mm connectivity.

    Frequently Asked

    Does it work with stereo headphones?

    Yes. The coupler passes all three conductors (left, right, ground) so it maintains stereo signal when joining two stereo 3.5mm cables. It works with standard consumer headphone cables, auxiliary audio cables, and TRS patch leads.

    Can it be used for balanced mono audio?

    Yes. Balanced mono signals use the same three-conductor TRS configuration as unbalanced stereo, with tip and ring carrying the positive and negative signal phases on a common sleeve ground. The coupler passes this configuration without modification.

    What's the difference between this and a mono coupler?

    A mono coupler typically uses two-conductor (TS) wiring and only passes tip and sleeve. This stereo coupler uses three-conductor (TRS) wiring and passes tip, ring and sleeve, making it compatible with stereo and balanced mono signals. Using a mono coupler on a stereo cable results in loss of one channel.

    Does it degrade audio quality?

    The coupler introduces a physical join point, which adds a small amount of contact resistance compared to a continuous cable. For typical consumer audio and short to medium cable runs, this is negligible. For professional studio use over long cable runs or high-impedance sources, a soldered join or purpose-made extended cable may be preferred.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.