Park Audio II GS Series, Owner'S Manual

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4
DESIGN FEATURES
Physical Design
The amplifier is enclosed in a metal (steel) case of 2U height. The amplifier is designed
to be installed into a standard 19" rack.
Power Supply Source
Switchable. Individual for each channel.
Cooling System
Forced, cooling rate smooth adjustable system.
Four fans, two per each channel. Backward air flow direction.
Dust Filter
Front panel filter readily removable/replaceable for periodic maintenance.
Power Amplifier Unit
Based on TD Class schematics.
TD Class power amplifier combines the best features of both Class D and analogue
amplifiers. The amplifier boasts the efficiency comparable to Class D amplifiers and sound
quality typical of analogue amplifiers.
Balanced inputs
The use of balanced inputs provides for an essential reduction of the environment-
induced hum and noise interference with long input connecting cables.
Input level Attenuators
Precision ALPS 31-step control knobs, individual for each channel.
Sensitivity slide switches
3 positions: 0.775V, 1.4V or 32dB fixed gain. Individual for each channel.
Mode switch
3-position slide switch.
Operating modes available:
– STEREO – two channels drive two separate loads from two separate signal sources;
– MONO – two channels drive two separate loads from a single input signal source;
– BRIDGE – two channels drive a common load from a single signal source.
Input filter
Third-order filter individual for each channel.
Two pre-set cutoff frequency points (35Hz and 45Hz ) plus a disable position.
Recommended by world leading manufacturers of loudspeakers.
This filter cuts off any signals below 35Hz or 45 Hz which generally cannot be reproduced
by most professional loudspeakers.
The filter significantly reduces the travel of the LF speaker cone below the loudspeaker
frequency cut-off point which makes it possible to increase the power applied to the LF speaker (the
power being not wasted for the cone “flapping”) and thus to raise the sound pressure created by the
loudspeaker without any danger of overheating the LF drivers.