5
In normal operation (using the passive internal
crossover), the 1/4" jacks and the Speakon™
Connectors are wired in parallel allowing any one of
the connectors to be used as an input and any other
as an output. This allows "daisy chaining" of multiple
loudspeakers, eliminating the need for several long,
cumbersome runs of speaker cable. During normal
mode, the connections are as follows:
Polarity Phone Jack Speakon™
Positive (+) Tip 1+ and/or 2+
Negative (-) Sleeve 1- and/or 2-
When the switch on the back of the speaker is in the
bi-amp mode, the internal crossover and high
frequency attenuator are disabled. Thus, an external
crossover must be used with the speaker and two
channels of power amplification will be required: one
for the low frequencies and another for the high
frequencies. In bi-amp mode, the connections are as
follows:
IMPORTANT: If the crossover switch is set to
external, DO NOT plug a full range signal into the
High Frequency input. Doing so will destroy the
compression driver.
The placement of any speaker can dramatically affect
its sound. Thus, there are several considerations to
review when placing loudspeakers.
First, the range of the horizontal coverage should be
determined. The speaker may be used as a single unit,
as part of a pair, or as part of a group of widely spaced
enclosures. In any case, maximum horizontal
coverage will be desired. Examples of these types of
setups are shown. The horn in this configuration has
a horizontal coverage angle of 90º and a vertical
coverage of 40º.
NOTE: When setting up your Mk III Series enclosures,
be sure to place the cabinets in such a way as to
minimize overlapping radiating patterns.
A second consideration is for feedback and bass
performance. If the speaker is placed near a large, flat
wall, the bass output will increase by approximately 6
dB. Placing the speaker near a wall can cause
feedback. If this occurs, the speaker must be moved.
A third consideration is to what degree the speaker
should be "heard and not seen", especially in
permanent installations. Remember, where the
speaker cabinets are placed will effect both their tone
and radiating patterns.
Mk III SERIES SPEAKER CONNECTIONS SETUP SUGGESTIONS
Two speakers arranged as a mono or stereo
pair requiring maximum horizontal coverage
Audience
Stage
Mk III
Cabinet
Mk III
Cabinet
Two speakers in a "loose pack" array
requiring maximum horizontal
coverage
30º
Mk III
Cabinet Mk III
Cabinet
Frequency
Lows
Lows
Highs
Highs
Polarity
Positive (+)
Negative (-)
Positive (+)
Negative (-)
Phone Jacks
Left
N/A
N/A
Tip
Sleeve
Right
Tip
Sleeve
N/A
N/A
Speakon
1+
1-
2+
2-