Proel AUP4150 - Manuale (Pagina 21)

8. CONNECTION OF TELEPHONE AUDIO SIGNAL
Connect telephone output terminal to screw terminal TEL INPUT(fig.2
ref.10). Use the most suitable connection accordingly to the audio
telephone signal characteristics. ( make reference to the telephone manual
user).
Balanced connection
Unbalanced connection
In order to access to the speakers terminal screws i (fig.2 ref. 10) remove
the protection cover :unscrew the fixing screws.
9. CONSTANT IMPEDANCE LINE
In order to have a constant impedance line (8/4Ω) connect the two
terminals respectively to COM e 8 o 4 Ω (fig.2 ref. 8).
• To ensure the maximum output, the total impedance of the speakers
connected to the line must be equal the amplifier output impedance.
• The total power of the speakers cannot be below the output amplifier
power .
• Advice: reduce to the minimum and as far as possible the connections
length. The cable section should be defined and increased
considering these distances.