Public radio amplifier failure analysis?
Boot to protect the light: first of all, using the multimeter, measure the horn group if there
is a short circuit, the resistance is reduced (normal for not less than 30 Ω) such as closed
circuit resistance is normal, namely discriminant is borne power amplifier has a fault, or
Smallpox horn how to distribution?
generally 8 m a horn spacing, the number of the total area divided by the area
of the sound field of a single smallpox, acoustic field area is equal to
0.785 * 2 H (H - 1.5)  is high.
Not after-sale questions or other problems can also be feedback to the after-sal
any questions can feedback to the after-sale service department,
we do very detailed records,
patience to answer for you, because the after-sale service department have support of each department.
Products can be how long warranty?
Answer: normal use 1 year free maintenance, otherwise paid lifelong
maintenance service, charge parts fee.
Radio and power amplifier work a very short or the volume slightly adjusted work
A: there are three kinds of reasons, will lead to protect radio amplifier phenomenon:
1st, the workload is greater than the power amplifier output rated load.
2, broadcast short circuit caused;
3, power amplifier itself. Can be ruled out by the following methods:
1, check the speaker's workload is how old? Negative speaker on radio engineering design work
General load should be 70% ~ 80% of the rated power output power amplifier. If the speaker workload is more than the standard,
Just need to change big power amplifier or decrease the number of speakers.
2, to load out all of the power amplifier, connected to a speaker working properly. Have a look at will
Now protect the phenomenon of power amplifier. If continue to appear power amplifier protection phenomenon, this is the fault power amplifier itself,
Need to change the power amplifier. If you do not see any protection phenomenon, this suggests that broadcast short circuit, needs
Inspection on radio line maintenance.
Radio is constant voltage power amplifier output ac signal or dc signal?
Ac signal voltage
is there anything wrong with loudspeaker wiring is not unified?
the speaker terminals must be like the output polarity of the power amplifier, if the connection method is not uniform, can lead to trumpet burned transformer, and even affect the power amplifier.