Via Monti Urali, 29 – 42122 Reggio Emilia (Italy) • Telephone: +39 0522 557735 • [email protected]
Charge Safety Control:
The charge is constantly measured and displayed on the software panel if its value
exceeds a factory set range.
DC Protection:
The presence of output direct current is monitored: in that case the output stage of the
amplifier and the switching power supply would be inhibited. This allows to protect the
cone loudspeakers from direct current. It is enough to turn off and restart the amplifier to
reactivate it.
Protection from Mains Power:
Mains input is supplied with a limiter for inrush current and fuse (outside) fluxes. System is
automatically protected and restarted in case of voltage drop. It is supplied with a system
of automatic adaptation to all the values of mains tension included between
115 and 230 V.
Noise Generator
It is supplied with two buttons, one to activate the noise generator (button 4. - Figure 2),
the other to select white and pink noise (
5. Pink noise / White noise
– Figure 2). The green
led (3. Active - Figure 2) indicates that the noise generator is on.
By a remote control supplied it is possible to activate the noise muting (that is to stop the
generated noise) from a remote place. The noise muting is indicated by the red led (
2.
Mute – Figure 2).
Activating the noise muting causes the switching off of the cooling fan for
a few seconds. It allows to perform measures of noise stopping without the disturbing
noise of the fan.
Figure 4: JA-BT optional device
With the JA-BT optional device (a battery power kit with an inverter to use the devices
without mains – Figure 4), the “JA-BT FAN CONTROL” connector allows to connect JA-BT
to JADSP1250 causing the switching off of JA-BT fan while the noise muting is activated.
“LEVEL” potentiometer allows to dose the amplitude of the noise sent to the amplifier. With
the switch OFF (13. User DSP – Figure 2), that is DSP control off, and the switch 5. set on
“pink noise”, turning completely the potentiometer clockwise (highest level) corresponds to
the maximum acoustic emission of the dodecahedron, without distortions or any thermal or
power protections.
