Proel HS15AL User Manual
Page 7
Operating Instructions
1. In case more horns are used at the same time in one place, take special
care of the polarity in order to achieve the correct sound pressure level. In
case of parallel connected horn speakers, the polarity must be the same
for all units. If the configuration is in series, care should be taken regarding
the polarity as with batteries connected in series.
2. The unit is specially suitable for long distance cabling, thanks to its built-in
transformer (use of 100V lines).
3. The unit features a switch on the back, which allows the selection of the
various power levels and volume adjustment.