this jumper in the OFF position. When you set this jumper to
the ON position, voice activated muting (vox) will be available
on microphone input 1. This muting system overrides the
mute activated by the chime/mute contacts. This way a two
level priority system is available. The level at which voice
activated muting starts is to be set by the internal vox sensitivity
attenuator (4) .
4. Vox sensitivity level: this attenuator sets the audio level at which
vox muting starts for microphone 1. This is only possible when
the vox on/off jumper (3) is set to the ON position. You have to
adjust this level carefully; otherwise background noise picked
up by your microphone or microphone cable might activate the
vox mute, causing unwanted interruptions of the music signals.
NOTE: Internal jumpers/controls should only be operated by
qualified personnel. Warning: risk of electric shock! By opening the
cover of the unit, you will be exposed to hazardous Voltages.
Less Ohms is more Watts: working with 100 Volt loudspeakers
and amplifiers is very easy. Consider a 100 Volt speaker line as a
high Voltage power line: “transporting” amplified sound over a
long distance, using relatively thin cables, with multiple speakers
wired in parallel, using local speaker line volume controls... Every
100 Volt speaker in the chain has a 100 Volt transformer which
transforms the high Voltage back into a normal speaker level. The
transformer and speaker act as one and represent a certain load for
the 100 Volt amplifier. The load is expressed in Watts allowing easy
calculations in terms of 1 + 1 = 2. A simple calculation rule reveals
the equivalent power in Watts @ 100 Volt once the load impedance
is known: power @ 100 V = (100 V x 100 V) / impedance. The
sum off all speakers in Watts must be smaller than or equal to the
output power of the 100 Volt amplifier. If you exceed the number
To Next Page
Loading...
