TEMA TELECOMUNICAZIONI SRL
Audio Amplifier AD301R
MAS-AD301R-REV01EN
Page 10 of 12
7.2. Basic connection with 4 horn speakers 15W-8 Ohm
It is possible to double the number of speakers compared to the previous example in order to have
a better sound distribution.
However, to comply with the characteristics of the minimum output impedance of the system
(minimum 4
Ω
) it is necessary to adopt a series/parallel connection of the speakers, it is not
possible to connect them all in parallel.
Keep in mind that if on one side the emitter surface increases (the number of speakers), on the
other the impedance obtained by the new connection mode does not allow to exploit all the power
that can be supplied by the amplifier but only half (in fact the impedance of the connected group
results at 8
Ω
).
To obtain a higher sound output, it might be advisable to use horn loudspeakers instead of
traditional models. The speakers could be the model
AD330/15T
.
Being in this case the power obtainable from the system limited to about 15W, it is possible to use
the
AA-39D1
power supply with a maximum current of 1.25A at 12V
DC
instead of the model
AA-
39D3
.