3
Short Circuit Protection
The
PX1700
is fully protected against all possible passive load conditions. It can operate into a
dead
short continuously without damage. (However, we don’t recommend that you short your
PX1700
“just for fun.” Shorts do create a lot of stress on the output devices). The output stage uses a unique
VI-limiting
scheme which is sophisticated enough to remain inert during transient currents in
excess of 40 Amperes and phase angles of more than 35 degrees, yet is capable of protecting the
output stage from damage due to accidental short circuits and improper loads.
DC Protection
In the unlikely event of the
PX1700
’s outputs
going
DC
, a protection circuit will disconnect the loud-
speaker from the amplifier.
Thermal Protection
In the unlikely event that the
PX1700
overheats, the signal will be sporadically cut off and the
PRO-
TECT LED
will stay on. The
PX1700
is designed and tested to operate under “worst case” conditions
without shutting down, so if you experience a thermal shut down you should check for blocked air flow.
Cooling
The fan draws air in from the front and expels hot air through the rear vents. This is compatible with
most installations. Since hot air rises, the heated air forcibly expelled from the back tends to rise
away from the equipment rack. This draws cool air from the floor upwards into the front of the rack.
In some cases where the rear of the rack is obstructed, it may be necessary to install rack fans to
aid cooling. If there are no obstructions, no secondary cooling is required.
Clip LEDs
The
CLIP LEDS
on the front panel will visibly indicate any signal excursion beyond the dynamic
headroom of the amplifier.
Reliability
The design of the
PX1700
is conservative with respect to the power handling capabilities of the
output devices. The topology guarantees that thermal stress not secondary breakdown will set the
limits of operation, while the computer optimized heat dissipation system insures that excessive
thermal stress will not occur.
Yorkville
’s reputation as a manufacturer of reliable equipment will be
further enhanced by the
PX1700
.
Output Connections
WARNING:
When driven to full power in Bridge Mode. There is more than 80Vrms ap-
pearing between the binding posts. This represents a significant shock hazard and due
care should be taken when making any speaker connections. Ensure that no strands of
bare conductor are exposed after inserting the speaker wire into the hole in the side of
the binding post terminals.
Circuit
Breaker
A-PX1700REAR
2v0
