Connections To The Amplifier - REVELL M55XC Owner's Manual

CONNECTIONS TO THE AMPLIFIER

For standard amplifier hookup be sure the speaker level switch is set to
"Thru (Position 5)"
Input Connections - Simply connect the amplifier's "+" and "-" outputs
directly to the (+) and (-) input terminals on the back of the enclosure
(see diag. 1).
Diagram 1.
8 Ω each – Since the loudspeakers have a rated impedance of 8Ω each,
more than one speaker may be wired to one amplifier channel (see diag.
2). (See "amplifier impedance load" below.)
Left
8Ω 8Ω
Diagram 2.
XC Series Outdoor Monitors
Owner's Manual
Input
Right
4Ω each channel
8Ω 8Ω
Amplifier Impedance Load - When you connect more than one
loudspeaker system to an amplifier channel, either by twisting two wires
together at the speaker location or via individual "home runs" from the
loudspeakers to the amplifier, the load impedance to the amplifier drops.
To find the maximum number of 8Ω speakers that can be wired in parallel
to each channel of your power amplifier, divide 8 by the amplifier's
minimum impedance load recommendation (e.g. 8Ω Revel speaker + 4R
amp's minimum impedance = 2 speakers per channel, see diag. 2).
Series/Parallel - It is possible to utilize various series/parallel 'hook-up'
topologies to increase the number of loudspeakers driven on an amplifier.
See diag. 3 for one example of a series/parallel hook-up topology.
Input
Left
+
+ +
+
- - -
Diagram 3.
Note: Mismatching the speaker impedance such that it is below
the minimum impedance rating of an amplifier channel can
damage the amplifier and degrade performance. If the application
requires more than 2 speakers per amplifier channel wired in
parallel, a distributed line system should be considered. Also
check your amplifier's manual for cautions and recommendations.
Importance of Correct Polarity ("In-Phase/Out-of-Phase") - When two
loudspeakers are wired with opposite polarity ("out-of-phase") relative
to each other, the low frequencies of the loudspeakers cancel each
other, even though the speakers are "working hard." Trying to correct
the lack of bass with an equalizer can damage your loudspeakers –
equalization cannot correct polarity errors. Always make sure multiple
speakers are connected in proper polarity.
Distributed Line Systems - The Revel M55XC & M80XC models
come equipped with built-in 70V/100V 60W variable tap transformers.
Utilizing these connections requires the use of a compatible 70V/100V-
capable line voltage amplifier. As with conventional 8Ω speakers,
simply connect the amplifier's "+" and "-" outputs directly to the (+) and
(-) input terminals on the back of the enclosure. Set the transformer tap
to your desired wattage. Unlike conventional 8Ω speakers, you may
connect as many XC speakers as you'd like to one amplifier channel
providing that all the speaker taps do not add up to more than the
amplifier's power rating (see diag. 4).
6 x 7.5 Watt = 45 Watts total load on amplifier channel
Input
7.5 Watt tap
7.5 Watt tap
Diagram 4.
(e.g. A 100 watt amplifier channel could safely drive 13 speakers set to
7.5 watts each, i.e. 13 x 7.5 = 97.5 < 100) A conservative rule-of-thumb
is to try to keep the sum of the speaker loads (watts) under 3/4 of the
power amp rating (e.g. A 100 watt amplifier channel will then drive 10
speakers set to 7.5 watts each, i.e. 10 x 7.5 = 75 watts).
Right
12Ω each channel
+
+
+
+
- - -
8Ω 8Ω 8Ω
24Ω
7.5 Watt tap 7.5 Watt tap
7.5 Watt tap 7.5 Watt tap
5