Wharfedale Pro Programme Sub - Manual (Page 12)

OPERATING MANUAL AND USER GUIDE
The Programme Series features an internal line-matching transformer with four power/
impedance selections for 70/100-volt line. In speaker systems, anything over 32Ω is
considered high impedance. Smaller wire can be used without excessive power loss. The
four power taps vary for each model.
• Programme 105: 7.5/15/30/60 Watts
• Programme 108/206/406: 15/30/60/120 Watts
If you are using these models, wiring is just as easy - with a few more steps. You connect
your speaker cable from the 70v or 100v output of your amplifier (or through an external
transformer) to the input terminals of the speaker. You will then have to adjust the wattage
of the transformer to the correct setting.
As you would with any audio system, you will need to figure out how many speakers that
you want to use and then divide that into the wattage of your power amplifier - you should
not exceed that load, otherwise, you will encounter distortion.
Because of the low wattage limitations of the individual speakers, this set up is normally
used in sound systems and areas where you only want to hear background music, or
occasional messages to everyone within a facility.
You connect the + (positive) side to the connector labled with the power rating and the
– (negative) to the ground (70V C/ 100V C) connector. If you are adding more speakers,
connect your speaker wire from the Red to Red and Black to Black.
HIGH-IMPEDANCE/CONSTANT-VOLTAGE SYSTEM:
Transformer tap (W)
Amplifier Power
Number of Speakers
70V C
100V C
8 +) 8
30W 60W
60W
15W
30W
7.5W
15W N/C
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