SPECTRA 1755, 1755EX, 1758 AND 1758EX PCB LAYOUT
Other than the location of the parts on the board and the items that have been indicated below, connections to these control
panels are identical to those on page 38.
CONNECTING SPEAKERS TO THE BELL OUTPUT (Siren Driver Option Only)
An optional siren driver is available with the Spectra 1755, 1755EX, 1758 and 1758EX control panels. This siren driver allows
you to connect speakers directly to the “bell” output as shown in the figure below. Minimum speaker rating = 30 watts.
NOTE: Other connection types can be used as long as the Bell Output does not exceed 2.5A.
# of 8ΩΩ speakers Connection Type Total Load Average Current Draw*
1 - 8 Ohms 800mA
2 Series 16 Ohms 460mA
2 2 Series, 1 Parallel 6 Ohms 1.8A
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