Sound System Setup NiteHAWK Internet Jukebox
3-6 22022602
Table 3-4 - Extension Speaker Worksheet
Sheet 4
Combine power consumption of all speakers:
Channel 1 Channel 2
Connected E1 to E7
Tapped 4-Ohm
Tapped 8-Ohm
70-Volt A1, A2
Channel 1 Channel 2 Grand Total
Totals: + =
1. The Grand Total is the amount of power that the jukebox will need to supply to the
extension speakers. If the Channel 1 Total "or" the Channel 2 Total is more than 500
watts, you must reduce the power used by that channels extension speakers, then
recalculate that channels power consumed.
NOTE: In any speaker installation, the total RMS speaker load (the sum of all power to all
speakers) must not exceed 500 watts per channel. It is strongly recommended that
“Efficient” extension speakers be used.
2. When you have reached a satisfactory combination of speakers and speaker power
consumption, connect the E1 to E7 speakers and the 70V speakers A1 to A2. Then
use the “Connections” column as a guide to wire the tapped E1 through E6
speakers.
NOTE: The amplifier may be connected to a load of 500 watts per channel before distortion
will begin to increase beyond specification.
Amplifier Overload Check
Check that the amplifier is not overloaded by performing the following four steps:
1. Make sure that the extension speakers are connected to the audio output
transformer proper terminals (E1 through E7, and A1, A2).
2. While the music is playing, if the yellow CLIP LEDs on the amplifier stay OFF or
flicker in a random manner, the load is acceptable.
3. If a yellow CLIP LED is always lit or flickers continuously, the amplifier is overloaded
and will shut down, and you must perform Step 4.
If a red OVERLOAD LED on the amplifier flickers, the amplifier is overloaded and will
shut down. You must perform Step 4 below.
4. Do this step only if a CLIP or OVERLOAD LED came on as described in Step 3.
Find the source of the overload (shorted speaker wires, too many speakers
connected, or speaker power taps too high in total wattage). After you fix the short,
disconnect a few speakers or lower the speaker power tap selection to reduce the
wattage, then repeat Step 2.
Sum of tapped, and
70 Volt A1, A2 must
not exceed 125 watts
per channel.
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