DLW-1 Phonograph
3-4
21822662
SOUND SYSTEM SETUP
Extension Speaker Operation
To avoid a poor sounding jukebox, care must be taken when adding extension speakers. Two requirements must
be met:
1. Speakers must be wired so that the power consumed by the extension speakers do not exceed the amplifier
power rating. After wiring the speakers, perform an Amplifier Overload Check.
2. All speakers must be connected with the correct polarity.
NOTE
The 70 V phasing is reversed inside the output transformers. See figure 3-7 for correct polarity
hookup of extension speakers. If the (+) and (-) terminals are not wired properly, the speakers
will be out of phase, causing a reduction in low requencies (bass).
Several charts have been included to assist you with connection of the extension speakers.
Figure 3-7 shows the entire sound system.
70 volt Speakers
To avoid prohibitive cable losses on long speaker lines (over 100 feet), use 70 V speakers. The power level
in the 70 V speakers is set at each speaker. 250 watts of the 1000 watts is provided for 70 V speakers by A1, A2
connections on the audio output transformer assembly.
NOTE
: 1000 watts can be connected if you configure the amplifier for stereo and connect 70 volt speakers E7 to
E7.
Low Impedance Speakers
Low impedance speakers (8 or 4 ohm) can be used when the connecting cable is less than 100 feet.
4 ohm Speakers (Parallel Connections)
No more than one 4 ohm speaker should be connected to a speaker line. If several 4 ohm speakers are to
be used, each speaker should have its own line.
8 ohm Speakers (Parallel Connections)
The loss in 100 feet of 18 gauge zipcord feeding on 8 ohm speaker is 15%. The loss for two 8 ohm speakers
is 30%.
NOTE
In any speaker installation, the total speaker load (the sum of all power to all speakers) must not
exceed 1000 watts per amplifier. The phonograph has an audio output transformer assembly
rated 250 watts (125 per channel) for connecting 70 V speakers, or connecting extension
speakers to taps. The sum of all power to 70 V speakers and tapped speakers must not exceed
250 watts.
Summary of Contents for StarLink DLW-1
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