The connector on each end of a subwoofer cable determines what you can plug it into, and the most common answer is a plain RCA plug. Understanding the RCA and XLR options helps you pick the cable that matches your receiver and subwoofer.

Subwoofer Cable Connector: RCA, XLR and the Right Ends

Quick Answer / Summary: The standard subwoofer cable connector is an RCA plug on both ends for home theater LFE connections, while pro and studio subwoofers often use XLR connectors; some sub cables use an RCA-to-XLR combination.

RCA Connectors for Subwoofers

The standard subwoofer cable connector is the RCA plug, a single-pin connector with a surrounding shield ring. It connects the receiver’s sub or LFE output to the subwoofer’s line input.

The standard end

RCA is unbalanced, so it is best on short and medium runs, but with good shielding it works fine for the low-frequency subwoofer signal across a normal room.

RCA subwoofer cables are the default for home theater, and they are the connector you will find on almost every AV receiver and powered home subwoofer.

XLR Connectors for Subwoofers

Pro and studio powered subwoofers often use XLR connectors, the three-pin locking plugs that carry a balanced signal. XLR rejects hum over long runs and locks in place, which suits live sound and fixed installs.

The balanced end

An XLR subwoofer cable has an XLR plug on one or both ends, typically female at the source and male at the subwoofer input, matching standard XLR cable conventions.

If the receiver or processor has XLR outputs and the sub has XLR inputs, an XLR-to-XLR subwoofer cable is the cleanest, quietest option.

Mixed and Specialized Connectors

Some systems mix connectors, using an XLR output on a processor and an RCA input on the subwoofer. A purpose-built XLR-to-RCA cable or a balancing adapter handles that, with the RCA side kept short.

A few subwoofer cables terminate in banana or speaker-wire ends for high-level speaker connections, but those are for passive subs or high-level inputs, not the standard line-level sub connection.

Always match the connector to the jack on each piece of gear, and never force a plug that does not fit.

Choosing and Maintaining the Connectors

Pick the connector type that matches your receiver and subwoofer. If both are RCA, a quality RCA-to-RCA sub cable is all you need; if both are XLR, use XLR-to-XLR.

Look for plugs with good strain relief and solid contact surfaces, since the connector is the part that gets plugged and unplugged and is the most likely to fail.

Grip the connector body, not the cable, when unplugging, and check for corrosion or looseness now and then, re-seating the plug if a subwoofer channel starts to cut out.

Subwoofer Cable Connector Types

Real-World Application Scenarios

A home theater owner plugs an RCA-to-RCA sub cable between the receiver LFE output and the powered sub; a studio uses XLR-to-XLR cables from the monitor controller to powered subs; a user with a processor that has XLR outs and a sub with RCA ins uses an XLR-to-RCA adapter cable.

Recommended Internal Resources

• the subwoofer cable guide
• the RCA subwoofer connection
• the balanced XLR sub connection

See subwoofer cable for the general guide, RCA subwoofer cable for the RCA side, and XLR subwoofer cable for the balanced option.

Frequently Asked Questions

What connector does a subwoofer cable use?

Most subwoofer cables use RCA plugs on both ends, while pro and studio subs often use XLR connectors.

Can I use an XLR subwoofer cable with an RCA sub?

Only with an XLR-to-RCA cable or adapter, and the RCA side should be kept short because it is unbalanced.

Which end of an XLR cable goes where?

Standard XLR cables have a female end at the source and a male end at the input, matching the jack genders.

Why does my subwoofer cable connector come loose?

Loose plugs are usually a worn connector or repeated pulling by the cable; grip the body when unplugging and re-seat or replace the plug.