HH Electronics SCALAR SR Series, Manual, Page: 16 / 20

Reliability Protection Function
1. Clip / Limit;
this function is used for preventing dangerously high level signal damage to the speakers,
Clip/Limit monitors the distortion produced by the amplifier output. When the distortion exceeds 0.5%
Clip/Limit will reduce the input signal to reduce the distortion.
2. Over heat Protection; if the amplifier works at full loading for a long time and the temperature rise reaches
over 105°C, the amplifier will go into over-heat protection status and the protection indicator on the front panel
will illuminate and the output will be cut. Try to use the amplifier in an environment temperature below 30°C.
3. VHF Protection; if the amplifier output frequency exceeds 10KHz, such as with MIC Feedback noise, then
the amplifier may go into VHF Protection after 3 seconds. The protection indicator on the front panel will be
illuminated and output to the speakers will be cut. The output signal will return within 10 seconds after the
removal of the VHF signal.
4. Short Circuit Protection; if the output is short circuited, the protection indicator on the front panel will be
illuminated and output to the speakers will be cut. The output signal will return within 10 seconds after the
removal of the short circuit.
5. AC Local Power Protection; if the AC power voltage drops too low, (~160V in the case of a ~230V unit),
the power supply will be turned off automatically until the power returns to the normal level.
6. DC Protection; if the DC output voltage to the speakers is large (>2.6V), the DC protection circuit will start
up, the output will be cut and the indicator on the front panel will be lit.
RELIABILITY PROTECTION FUNCTION
This product conforms to the requirements of the following European Regulations,
Directives & Rules:-
CE Mark (93/68/EEC), Low Voltage (72/23/EEC), EMC (2004/108/EEC),
RoHS (EU2002/95/EC), WEEE (EU2002/96/EC)
In order to reduce environmental damage, at the end of its useful life, this product
must not be disposed of along with normal Household waste to landfill sites. It must
be taken to an approved recycling centre according to the recommendations of the
WEEE (Waste Electrical and Electronic Equipment) directive applicable in your
country.
In the interest of continued development, HH Electronics
reserves the right to amend product specification without prior notification.
TM
Trademarks: Speakon and the names of Neutrik®AG products
referenced herein are either trademarks and/or service marks of Neutrik®AG.