Samson RSX115 Manual Do Utilizador

7

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 Output

Channel 1 Output

Right Output

Left Output

Channel 1 Input

Channel 2 Input

When speakers are connected in parallel, the impedance is reduced. The formula to calculate the total 
impedance of your speaker system is:

1/Rt = 1/R1 + 1/R2 + 1/R3 + … 1/Rn

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.