Hafler P3100, User Manual

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P3100™ Power Amplifier Hafler
Passion for Perfection
Connecting the Power
The P3100 operates from a 120 volt, 60Hz AC power line or 230 volt, 50-60Hz AC power line. Connection is made by a 14-gauge, IEC,
grounded line cord. The voltage is preset at the factory for the country where the P3100 is shipped but may be changed on the rear
panel is case the P3100 is operated in another country. Users in Japan should use the P3100 with a 100V to 120V step up transformer
rated at least for 700VA if they wish to obtain the full rated power of the P3100.
For safety considerations only a properly grounded (earthed) receptacle should be used. If a grounded circuit is not available do not
cut or remove off the ground pin. Mounted on the rear panel is the line fuse which interrupts the power to the amplifier. If this fuse blows
replace it only with the same type and rating fuse. The correct replacement fuse value is printed on the rear panel of the amplifier.
If the new fuse blows, this is an indication of a fault with the amplifier. Servicing should be performed only by a qualified technician.
Connecting Inputs
The input jacks are located on the rear of the amplifier. XLR input jacks are provided
for balanced line operation and RCA phono jacks for unbalanced sources. An input
select switch is provided on each channel to choose between the XLR balanced
input and the RCA unbalanced input. A ground lift switch is also provided on each
channel should you encounter hum or buzz from ground loops.
4
INSTALLATION
Location and Mounting
The P3100 power transformer can generate a substantial magnetic field, so caution
should be exercised in the placement of low level components such as a mixer or
mic preamp to avoid inducing noise in the low level circuitry. The amplifiers can also
produce considerable heat in normal operation so the primary consideration when
determining a location for the amplifiers is to allow for adequate ventilation. The large
heatsinks provide unrestricted airflow, but care must be taken to keep the slots in the
top and bottom cover clear. If the amplifier is mounted in an equipment rack, make sure
adjacent equipment does not impede cool air flow.
Connecting Outputs
The speaker output connectors are dual binding posts. These binding posts will directly accept wire gauges as thick as 6 AWG
(4.12mm OD). To determine the cable gauge required for the distance of cable for your setup please refer to the chart on pg.5. Safety
regulations prohibit the use of dual binding posts and the posts are spaced to disallow this. Before making connections, ensure the
amplifier is turned off along with all of the source equipment. This will avoid loud plug-in and connection transients that can damage
more sensitive components such as tweeters.
It is also very important that you do not connect loudspeakers that are below the rated impedance of the P3100. This amplifier is
capable of driving loads down to 4 Ohms, but not less. Driving loads below 4 Ohms can lead to overheating and premature part failure.
In bridged mono use, the P3100 should be connected to a speaker with an impedance of 8 Ohms or greater. Under no circumstances
should the output terminals of the P3100 be short-circuited.
Gold-plated binding
post adapt to any size
cable wire.
<OPEN RACK SPACE>
<OPEN RACK SPACE>
Fig 1
Fig 1
Unbalanced
Select
Push “in”
UNBAL OUT
UNBAL IN