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HSP SERIES INSTALLATION AND OPERATION MANUAL
INSTALLATION
Power Requirements
Power consumption for your model of the HSP series amplifier is indicated
on the rear panel for 1/8th output power.
Ensure that your mains voltage is the same as the rear panel mains voltage
marker (+/- 10%).
Mounting
The HSP series amplifiers are one or two rack units high (1U) (2U) and will fit
a standard EIA 19” or rack.
Typically amplifiers may be stacked directly on top of each other with no
need for spacing between units, unless installed in high ambient temperature
environments where a single rack unit space between amplifiers will assist
cooling further.
Cooling
The HS120P is convection cooled and does not require any special
consideration.
The HS250P, HS2120P, HS2250P, HS4120P and HS4250P amplifiers are
cooled by axial fans which draw air inside the amplifier and expel the heated air
outside the amplifier. These amplifiers offer variable speed fans which run at
half speed up to full speed when the internal heatsink temperature increases.
An unrestricted airflow into and out from the amplifier must be provided. Any
restriction of the air flow will cause heat to build up within the unit and possibly
force the unit into its thermal shutdown mode.
If the amplifiers are to be operated in an environment where the airflow is
restricted such as sealed racks, cooling should be supplemented by extra
cooling fans to evacuate the heated air and aid the flow of cool air through
the unit.
Balanced Input Wiring
1 2 3
INPUT 1
IMPORTANT
: Do not directly connect pin 3 on the amplifier’s input to the
amplifier’s chassis, speaker ground or power ground!
WARNING:
Input signal ground should NOT be used as a safety
ground (earth).
The balanced input to the amplifier is 3-pin configuration and requires all
three pins to be connected. Only high quality twin-core shielded cable should
be used.
Pin 1 is the left most pin when viewed from the back of product.
Pin 1 = Hot (non-inverting or in phase)
Pin 2 = Cold (inverting or reverse phase)
Pin 3 = Signal Ground
When wiring from an unbalanced source you must ensure that pin 2 is
connected to pin 3 (Signal Ground), either by linking the pins in the input
connector or by the source equipment’s output wiring.
When wiring for an unbalanced source:
Pin 1 = Hot (non-inverting or in phase)
Pin 2 = Signal Ground
Pin 3 = Signal Ground
Output Wiring
When wiring to your speakers always use the largest gauge wire your
connector will accept. The longer the speaker lead the greater the losses
which will result in reduced power and less damping at the load. We
recommend using a heavy duty, two core flex (four core flex if bi-amping)
10 to 12 gauge (2mm2 to 2.5mm2 or 50/0.25 or equivalent) as a minimum.