EX12 USER’S GUIDE
P. 8
operating level. This type of protection allows the phase
response of the system to remain unchanged as the
level is lowered. Buy not compressing or limiting peak
signal, dynamics also remain unchanged. The control
objective is to regulate the operating temperature of the
transducers magnetic circuits log term. This ensures no
impact on performance due to power compression and
allows the components to retain their ability to repro-
duce high dynamics.
LED Status Lights
The EX12 control panel uses two distinct LED’s to
provide operating status information.
Power On / Limiter LED
This LED turns green when the speaker is turned ON.
The light will continue to be green during normal opera-
tion of the speaker system. Should the rms limiting
system be engaged due to overdriving of the EX12,
the LED will change color from green to yellow. The
audible effect of the rms limiter is a lowering of overall
output level. The rms limiter will disengage only if the
input level is turned down.
Signal / Thermal LED
This LED turns green when there is audio signal pres-
ent in the EX12. This signal indicator can be used to
troubleshoot wiring problems. The LED will change
from green to yellow under a thermal condition result-
ing from overheating of the amplifier system. Under this
condition, the speaker system will shut down. You can
expect for the system to be down for at least 2-3 min-
utes depending the ambient temperature and whether
the system is being exposed to direct sun light.
NOTE
: The EX12 features a finless
heatsink that allows it to operate in any posi-
tion. There is also an internal fan located inside the
amplifier module. The fan speed is dependent on
two factors; the temperature of the heat sink and the
output level of the speaker. As temperature increas-
es, so does fan speed. As audio level increases, fan
speed also increases as a preventative measure
designed to keep the heat sink temperature low.
Under normal operating conditions, the fan noise
remains inaudible. Please contact KV2 Audio or a lo-
cal service representative should the system enter a
thermal condition under normal operating conditions.
Stage Monitor Filter
The EX12 features a 90 Hz Monitor Filter control. De-
pressing the button engages a low pass audio filter al-
lowing the speaker to be effectively used to reproduce
frequencies above 90Hz.
CHAPTER 2: AUDIO SIGNAL
