Front Panel
INPUT LEVEL: The Input Level control provides a means of scaling the effect of
the individual headphone volume controls.
The
Input Level should be adjusted so that there is an adequate range of volumes available at each listening
position, so that any
listener can be accommodated, and the average listener's volume will be set at about halfway. The Input Level control is
s
tereo
–
it
affects both left and right channels simultaneously.
t
SIGNAL PRESENT LIGHTS: These yellow LED's turn on whenever a signal exceeding 125 millivolts RMS (40 dB below full
power) is present at the HA-6A's input jack. They will increase in brightness as the signal strength increases. This feature is
very useful as a clue to where the fault may lie if the expected program is not heard at the listening stations.
OVERLOAD LIGHTS: These LED's glow red to indicate an overload in the HA6A. If the LED lights up, either the drive level to
the unit should be reduced, or the setting of the Input Level control should be reduced until the LED remains off. The lights
turn on when the signal level at either output approaches .5 to 1 dB of clipping. Once triggered, the lights will stay lit for a
minimum of 50 milliseconds so they can be easily seen, even if the actual duration of the overload is much shorter.
HEADPHONE JACKS / VOLUME CONTROLS: Any type of headphones, wired with a standard 1/4" stereo phone plug, may be
used successfully. All six outputs receive the same stereo signal. They differ only in the individual volume settings.
SPEAKER A BUTTON: Depressing this button turns on the speakers connected to the SPEAKER A banana jacks on the rear
panel, and
simultaneously turns off the signal to all the front panel headphone outputs.
SPEAKER B BUTTON: Depressing this button turns on whatever is plugged into the SPEAKER B - SATELLITE/REMOTE XLR
connector on the rear panel. This will be either a pair of speakers or a chain of HR-2 Remote Stations. Therefore, leave this
button depressed when using Remote Stations. Depressing it does
not
turn off the front panel headphone outputs. See the
section on the Rear Panel for speaker wiring.
POWER LIGHT: Glows red when unit is receiving power and the ON-OFF SWITCH is in the ON position.
Rear Panel
