Roberts Radio 32-2054 - Manual (Page 13)

Connect
ions
13
Transformers allow you to:
• connect speakers with different impedances
without causing output differences between the
speakers.
• add or remove a speaker from the system
without having to recalculate the entire
system’s impedance.
• reduce signal loss when you use speaker wire
over 50 feet (15.24 meters) long.
Line transformers have several connectors called
taps. The primary taps on one side of the
transformer are the inputs, and are rated in watts.
The secondary taps on the other side of the
transformer are the outputs, and are rated in
ohms.

Follow these steps to connect the speakers with the
transformers. Example shown on next page.
1. Connect a wire from the amplifier’s 70V
terminal to the transformer’s desired primary
tap (10, 5, 2.5, 1.25 or 0.62 watts).
±
2. Connect a wire from the amplifier’s COM
terminal to the C (common) taps on the
transformer’s primary side.
3. Connect a wire from the speaker’s positive (+)
terminal to the transformer’s secondary tap that
matches the speaker’s total impedance
(4
Ω
, 8
Ω
, or 16
Ω).
4. Connect a wire from the speaker’s negative (-)
terminal to the C (common) tap on the
transformer’s secondary side.
±016' ±
Usually, a speaker in a
system uses the same
wattage tap. If you want a
particular speaker to have a
higher volume level, connect
the wire from the 70V terminal
to a higher wattage tap on its
transformer.
%#76+10
• Before you connect the
speakers, be sure the total
wattage of the primary tap
you use does not exceed
the amplifier’s maximum
40-watt output power
rating.
• Avoid multiple connections
to the amplifier’s 70V and
COM terminals.