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March 12, 2013

Connecting A Subwoofer: What Goes Where?

Filed under: Audio Knowledge — Tags: , , , — Amie C @ 9:38 am

Connecting a SubwooferContinuing in our series of videos about subwoofer setup, Axiom Engineer Andrew Welker gives us an idea of what you need to know about subwoofer connections.  It can be confusing – XLR, Line Level, RCA . . . what’s the right one to use?

Andrew  Welker:  Today we’re going to talk a little bit about connecting a subwoofer to a receiver.  Connecting a subwoofer is not very difficult, particularly as most home theater receivers now have dedicated Subwoofer Outputs on them.  The first thing that I want to mention is that before you make any connections it’s a good idea to make sure that the power is off to the receiver and the subwoofer.   You’re not necessarily going to damage anything, but it can cause some startling bangs and noises if things are not right.

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January 21, 2011

What are “balanced connections” and the benefits of balanced cable?

Filed under: AV question — Tags: , , , — Alan @ 3:22 pm

Q. Some expensive A/V preamp-processors and power amplifiers offer “balanced connections.” And the new Axiom EP600 and EP500 subs also have them. What are they, and are “unbalanced” connections inferior to balanced? What would I gain in performance using balanced cable? – J.C.

Balanced Connector

Balanced Connector

Used almost universally in the world of recording studios and professional broadcasters, balanced cable use a three-wire cable fitted with very secure and solid “XLR” connectors (sometimes called “Cannon” connectors). The three-wire balanced configuration is composed of an outer shield surrounding two out-of-phase inner wires that carry the positive and negative portions of the signal. This enables running very long cables–hundreds of feet if necessary– between amplifiers and preamps or between microphones and a mixing console without picking up hum or interference and without significant signal loss.

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