KV2 Audio EX1.8 - Manual (Page 8)

EX1.8 USER’S GUIDE P. 8
Amplifiers and Acoustic Filters
A power amplifier specifically designed and
optimized for the low frequency woofer powers the
EX1.8 . The control system in the EX1.8 processes the
audio signal through a series of electronic filters and
circuits providing equalization, crossover filters,
thermal and overdrive protection.
LED Status Lights
The EX1.8 control panel uses three distinct LED’s to
provide operating status information.
Power On / Thermal LED
This LED turns green when the speaker is turned ON.
The light will continue to be green during normal
operation of the speaker system. The LED will change
from green to yellow under a thermal condition
resulting 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 minutes depending the ambient tempera-
ture and whether the system is being exposed to
direct sun light.
Signal
There are individual LED’s for each the Left and Right
signal inputs. The LED turns green when there is
audio signal present in the EX1.8. This signal indicator
can be used to troubleshoot wiring problems.
Limiter
Should the rms limiting system be engaged due to
overdriving of the EX1.8, the LED will light up 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.
Phase Switch
The EX1.8 features a phase switch that changes the
phase of the high pass audio output signal. Changing
the phase of the output signal serves as a tool for
integrating the full range cabinet and the subwoofer
into challenging audio environments. We recommend
using a suitable measuring device for performing
relevant measurements and determining whether the
phase should be reversed.
Level Control
The EX1.8 features a rotary control knob providing
adjustment of the audio level. The operational range of
the control is –6dB to +6dB.
EX1.8 CONTROL PANEL
NOTE: Please contact KV2 Audio or a local
service representative should the system
enter a thermal condition under normal
operating conditions.