Emotiva UMC-1 Operation Manual page 38

THE SURROUND SPEAKERS
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Place each surround speaker to be an equal distance away from your central listening position and keep them at least
one or two feet above ear level.
The diagram below shows the use of dipole surround speakers. These are usually positioned to the side of your listening
position. They radiate forwards and backwards and have a quiet null zone (the "apex" of the triangular shape) which
should point towards the listener. The overall effect is that you cannot hear the direct sound from the surround
speakers because they don't directly radiate into the listening space. Most manufacturers of dipole speakers intended
for use as an effects or surround speaker have excellent details on optimum positioning for the best overall results
based on the application.
Conventional surround speakers can be placed behind the listener, on the rear walls or the side walls or in the ceiling
(as the diagram indicates). Adjust the angle so they do not point directly at the listener but cause reflections from the
sidewalls, floor, or the ceiling. Avoiding direct aim at the listening positions will give the effect of broadening the rear
soundstage so that you cannot distinguish the sound as coming from a small box on the wall but from a larger area
behind you.
THE BACK SURROUND SPEAKERS
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The UMC-1 has two extra outputs for surround back speakers. These create a wonderful sense of realism in surround
effects during playback of Dolby TrueHD, DTS HD Master Audio, Dolby Digital EX, Dolby Pro Logic IIx, and DTS ES.
The UMC-1 can be configured for one or two surround back speakers. Ideally, all the surround speakers should be of the
same make and model, and fitted at similar heights to produce a smooth continuous sound field. If you are connecting
one surround back speaker, connect its amplifier input to the UMC-1 LEFT CHANNEL SURROUND BACK output. Place the
speaker behind your listening position.
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