Cambridge SoundWorks MC650-IW - Manual (Page 5)

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Examine each part carefully for shipping damage. If there is any,
do not install or use the speaker. Return the speaker to the merchant
where you made the purchase or call Cambridge SoundWorks at
1-800 FOR-HIFI (1-800-367-4434) for assistance.
Inspecting For Damage
For the best performance, a Cambridge SoundWorks HD series
in-wall or freestanding loudspeaker should be used on all channels of
the surround-sound system. You may freely mix and match the main
and surround speaker pairs within the series with good results.
Both models covered in this manual are intended for use in systems
that contain one or more subwoofers, and is not designed to
reproduce the deep bass range. Use a receiver or AV processor that
incorporates a high-pass crossover whenever possible.
System Configuration