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Figure 2. Rear Panel
1. Output / Speaker connector
The Speakon connector from Neutrik® may be unfamiliar to some users. A full description is found in the
operation section. (See page
11
).
2. Clip limiter switch
Turns the clip limiter on (switch IN position) or off (switch OUT position). (See page
13
).
3. Input signal XLR
.
Neutrik® Combojack features also ¼” TRS phone jacks. (Pin 2 is “hot”, see page
10
).
4. Link Output
. 3-pole screw terminal of Phoenix brand. Connected in parallel to the female XLR
input connector for linking the channel to another input.
5. Gain switch channel B
. Three of the switches in the DIP-switch selects the maximum gain of the
channel to be either 20, 23, 26, 29, 32, 35, 38 or 41 dB. (See page
5
).
6. Link and Bridge switch
. Two of the switches in the DIP-switch are used for Link and Bridge
operation. (See page
6
).
7. Gain switch channel A
. Three of the switches in the DIP-switch selects the maximum gain of the
channel to be either 20, 23, 26, 29, 32, 35, 38 or 41 dB. (See page
5
).
8. AC power cable.
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Before turning the amplifier on please read the following sections to make sure that the unit is set up
properly for your specific application.
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The gain switch located on the rear panel (the central DIP-switch) changes the input sensitivity of the
amplifier. This can be handy when using low or high nominal input signals. E.g. most professional mixing
consoles operate at a nominal level of +4 to +6 dBu; therefore you may use the 32dB position to provide
you with plenty of fader movement. On the other hand, for a disco mixer operating at a nominal level of
0dBu or less use the higher gain positions.
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There are separate sections for the two channels, so different gain can
be selected for channel A or B. The selection of maximum gain in the
amplifier is always a trade between noise and headroom. A low gain
amplifier amplifies less of the noise of the preceding equipment (mixer,
crossover, equalizer etc.). On the other hand a higher level is needed to
get full power, so the headroom will be decreased on mixer output
and/or crossover units. In an actively divided system there is very often
a so-called loudspeaker processor or controller involved, being unique
for the loudspeaker system. In most cases the manufacturers of these
processors and/or loudspeakers recommend a specific system gain for
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