Zenith 13K2 Amplifier Manual
22
7.6 Front panel monitoring and
adjustments
7.6.1 Level indicators
The front-panel displays an array of ten LED
indicators for level and status monitoring of each
amplifier channel. Indications related to signal levels
are as follows:
Red CPL (Current Peak Limiter)
illuminating
Indicates that output signal has reached the limit of
the output devices and limiting is in effect.
Green VPL/CLIP
indicates that signal has reached
maximum output voltage. (Maximum voltage is
determined by rear-panel VPL settings.)
Green SIG
to -4 Indicates output signal levels
in normal operating range.
SIG + HI-IMP (green/red)
- Indicates input signal
above -44dB. Should the SIG indicator turn red, this
indicates a high-impedance, or open connection has
been detected at the output. Possible faults include
a disconnected cable or malfunctioning
loudspeaker. (In some cases a normal condition,
such as a sub-b ass enclosure with high-impedance
at a certain frequency, can trigger this indication.) If
the -10 dB LED illuminates and the HI-IMP LED turns
orange, then the amplifier has detected an open
load (no loudspeaker connected).
7.6.2 Level adjust
Level adjust potentiometers (one per channel) are
located on the front panel adjacent to the LED
display. The potentiometer's operational range is
0dB to minus infinity. Attenuation is logarithmic,
with -10dB at the 12 o'clock position.
7.6.3 Mute indication
Individual channel Mute is indicated by illumination
of the red MUTE LED provided for each channel.
