Speakers Connections - Inter-m EMI-300 Operation Manual

7-CHANNEL 2 X 150W MIXING AMPLIFIER

Speakers Connections

Speakers Connections
CAUTION: When connecting devices to your EMI-300, avoid using non-standard plugs and cables.
Single Speaker Pair
In stereo and mono mode, connect the speakers to the AMP 1 and AMP 2 outputs (18). For bridge mode, use
the BRIDGE OUT terminals (19). Watch for identical speaker polarities to avoid phase problems and sound
cancellation. The output power capacity of the built-in amplifiers is at optimum efficiency when they are
connected to a 4Ω speaker load in stereo or mono mode, and an 8Ω speaker load in bridge mode. Higher
impedances (e.g. 8Ω or 16Ω) decrease the available output power, while impedances below 4Ω (8Ω for
bridge mode) can overload the outputs.
Connection of Additional Speakers
When connecting multiple speakers to the EMI-300, always observe the polarities to avoid phase problems and
sound cancellation.
In a network of speakers, all speakers should produce the same volume. This is a given when all cabinets have
the same individual impedance and when the network has a symmetrical structure. The illustration below shows
examples of a symmetrical and an unsymmetrical network (all speakers are assumed to have the same
impedance).
25%
25%
100%
25%
25%
Parallel and Series Wiring
When connecting several speakers to one output terminal, you have the choice of using either parallel or series
wiring. Parallel wiring should be used when the speakers have individual impedances of 8Ω or higher. Use
series wiring for speakers with impedances of 4Ω or less.
10
EMI-300
+ -
+ -
+
-
- +
- +
symmetrical
This speaker is louder
than the other two
+ -
68%
+
100%
-
- +
16%
- +
16%
unsymmetrical