Radial Engineering SW4 Owner's Manual download pdf (Page 8)

True to the Music

Radial Engineering Ltd.

SW4 User Guide

THE STEREO MIX BUS

Another useful feature built into the SW4 is the stereo mix bus.

Each channel is equipped with a recessed BUS switch that when

depressed routes the channel output to XLR and ¼” output jacks on

the rear panel. An LED indicator below the BUS switch illuminates

when a channel is routed to the mix bus. The odd channels-1 and

3 are routed to the LEFT output, while the even channels-2 and 4

are routed to the RIGHT output.

The mix bus may be operated in stereo or mono as selected by

the bus OUTPUT ASSIGN switch located on the top panel. When

set to mono, the program material is duplicated on both left and

right outputs. Transformer isolation is used on each bus output in

order to eliminate hum and buzz caused by ground loops. A ‘set

and forget’ ground-lift switch for the XLR outputs located on the top

panel further aids in reducing system noise.

The stereo mix bus is used when you mix multiple channels

together. In the following example, the SW4 is used to switch

between primary and backup multi-tracks. All four channels are

routed to the mix bus where the signals are connected to the PA

mixing console. The headphone and mono outputs are used with

the PFL system to check that the tracks are playing in sync. The

mix is also sent to two self powered monitors to allow the cast and

crew to hear their cues from backstage. All four channels on the

SW4 are linked and switch at the same time when the channel-1

A/B selector is pressed.

Mix bus includes balanced XLR

and unbalanced ¼” outputs.

Trim control for the mix bus ¼” outs

and ground lift for the XLR outputs.

Recessed BUS switch routes the

channel output to the mix bus.

Bus Assign switch lets you operate

the mix bus in stereo or mono.

Top Panel

Front Panel Rear Panel

Back Stage Monitors

PFL Cue Speaker Headphones

Primary Mult-track

PA Mixing Console

Backup Mult-track

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Radial Engineering SW4 Owner's Manual Page 8

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