Boston Acoustics Voyager Serie Manual Del Usuario página 6

In contrast, the speakers on either side of the fountain facing the lounge chairs are well placed to produce a
good stereo image. Those speakers could be wired so each one reproduces just one channel of a stereo signal.
Multiple Speaker Connections
Sometimes you may want to conect more than one speaker to a given channel of an amplifier. This can be done
with certain limitations. The main concern is that the impedance (or electrical "resistance") expressed in ohms,
of the combined speaker load must be within a range common amplifiers can handle. The following information
describes basic common multi-speaker connection schemes. For the sake of clarity and space the connection
diagrams will show common schematic symbols instead of speaker images.
There are two basic connection methods-parallel (A) and series (B). The parallel connection is shown on the left,
the series connection on the right.
The diagram also shows the impedance at the amplifier with the two types of connections. Two 8-ohm speakers
connected in parallel produce a 4-ohm impedance. (Note: This is electrically the same as the diagram at the top
of the page showing both inputs of the RK speakers connected to one channel of the amplifier.) Most amplifiers
can handle a 4-ohm impedance load. Impedance loads lower than 4 ohms can trigger amplifer protection circuits
or, in some cases, cause over heating.
Two 8 ohm speakers in series produce a 16 ohm impedance. This is an easy impedance for an amplifer to handle.
However it will result in somwhat lower power ouput.
A B
NOTE: RK6T and RK8T are stereo speakers in one enclosure and should be treated as  channels
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