Radio Shack MPA-50 Owner's Manual page 11

32-2002.fm Page 11 Friday, February 11, 2000 11:36 AM
Cautions:
• Before you connect the speakers, be sure the total wattage of the primary taps
you intend to use does not exceed the amplifier's maximum 40-watt output power
rating.
• Avoid multiple connections to the amplifier's
Follow these steps to make the connections.
1. Connect a wire from the amplifier's
tap that matches your speaker's wattage rating. For example, if you will be con-
necting a 2.5-watt speaker to a transformer, connect this wire to the 2.5 tap on
that transformer's primary side.
2. Connect a wire from the amplifier's
former's primary side.
3. Connect a wire from the speaker's positive (+) terminal to each transformer's
secondary tap that matches the speaker's total impedance (4, 8, or 16
example, if you are connecting an 8-ohm speaker to a transformer, connect this
wire to the 8 tap on that transformer's secondary side.
4. Connect a wire from the speaker's negative (–) terminal to the COM tap on each
transformer's secondary side.
and
70V COM
terminal to each transformer's primary
70V
terminal to the COM tap on each trans-
COM
Speakers
terminals.
). For
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