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7RSX Passive Loudspeakers
Basic Set Up
The RSX loudspeakers are passive cabinets, which means that they need to be connected to a
power amplifier to reproduce an audio signal. Each speaker cabinet features two sets of parallel
connectors. This enables each cabinet to be daisy chained to an additional loudspeaker. When
connecting multiple speaker to a power amplifier or powered mixer, you must pay attention
to the minimum load impedance of the amplifier. Most amplifiers can safely provide power to
loudspeakers with a minimum load impedance of 8 or 4 ohms. The RSX loudspeakers are rated
at 8 ohms. This means if two RSX cabinets are wired in parallel the nominal impedance of the
speaker system will be 4 ohms.
Channel 2 OutputChannel 1 Output
Right OutputLeft Output
Channel 1 Input Channel 2 Input
115V 60Hz, 1900W
SX 1800
400 W
600 W
1+1-
1+ 2+
2+2-
1+1-
E251753
23FY
When speakers are connected in parallel, the impedance is reduced. The formula to calculate the total
impedance of your speaker system is:
1/R
t
= 1/R
1
+ 1/R
2
+ 1/R
3
+ … 1/R
n
Where “R” is the impedance of a speaker cabinet.
If all speakers have the same impedance, the total impedance will be equal to the impedance of a single
speaker divided by the total number of speakers. For example, if you have two 4 Ohm speakers connect-
ed in parallel, the total impedance is 4 divided by 2, or 2 Ohms. You must be careful when connecting
speakers in parallel to an amplifier. The impedance can quickly fall below safe levels. This is especially
true when connecting speakers in parallel to a bridged amplifier.