DPI SERIES USER MANUAL
4
2. Safety Instructions
All safety and operation instructions must be read before this
unit is operated.
The safety and operating instructions must be retained with
the unit for future reference.
All warnings on the appliance and in this operation manual
must be strictly followed.
This unit must not be used near water - for example, near
bathtub, washbowl, kitchen sink, laundry tub, in a wet base-
ment, near a swimming pool, etc.
This unit must be placed away from heat sources, such as
radiators or other heat producing devices.
The power supply cord must be routed so that it is not likely
to be stepped on or pinched by objects placed on or against
it.
The power cord of the unit must be unplugged from the mains
outlet if the unit is not used for a longer period.
Care must be taken that objects do not fall and liquids are not
spilled into the inside of the unit.
Unplug the unit and demand servicing by qualified service
personnel under any of the following conditions:
•
Objects have fallen, or liquid has been spilled into the unit;
•
The unit has been exposed to rain;
•
The unit does not appear to operate normally or exhibits a
marked change in performance;
•
The unit has fallen, or its chassis got damaged;
•
The power cord or power plug are damaged.
The user must not attempt to service the unit beyond those
means described in this operating manual. All other servicing
must be referred to qualified personnel.
To prevent electric shock do not use the polarised plug with
an extension cord, receptacle or other mains outlet unless the
prongs can be fully inserted to prevent contact exposure. This
unit is equipped with a single pole disconnect device (fuse) in
the phase (live) wire. If an unpolarised mains connection is
used, the receptacle the unit is connected to must be equipped
with a two pole disconnect device (fuse) of appropriate rating.
The dust filter cover on the front of the unit forms an integral
part of the electrical safety provisions. Do not use the unit
without the dust filter cover in place!
Precautions should be taken so that the grounding and mains
polarisation means of the unit are not defeated.
Slots and openings in the unit are provided for ventilation. To
ensure reliable operation and to prevent overheating of the
unit, these openings must not be blocked or covered!
The fanguard on the front of the unit is an integral part of the
safety provisions of the DPI amplifier. Make sure it is correctly
mounted before connecting the unit to a mains outlet.
3. DPI series Features
DPI series power amplifiers feature:
Switching class D output stage.
Fully symmetrical, and floating modulator for unsurpassed
accuracy and cross channel separation.
Open input architecture for future expansion. The stand-
ard input module PIM-SIM provides
inputs on Neutrik®
Combo connectors or Phoenix screw terminals, parallel link
outputs on XLR-3M for easy routing of multiple amplifiers and
selectable high pass filters with 30 and 50Hz second order
high pass filter characteristic.
Instant recovery, eliminating stitching of the output when
recovering from clipping or overload.
EFL® (Extended Feedback Loop). This inovating technique
makes it possible to take the feedback for the amplifier right
from the loudspeaker terminals, offering unprecedented con-
trol of the loudspeaker, independent on loudspeaker cable
length. The amplifier can be used as a conventional amplifier
without this feature enabled, without any inconveniences.
Defeatable clip limiter with selectable response time.
Minimum sample frequency selection.
Protection against over-dissipation, open or short circuit and
HF or DC at the output.
Outputs on touch proof Neutrik® Speakon connectors and
high current Phoenix® screw terminals. Speakons have
integral sensing inputs for the EFL circuit.
Low flux toroïdal power transformer with thermal sensing.
The output power of the amplifiers is reduced in case of
overheating.
Extensive power line filtering for minimal interference.
Soft start to minimise current surge on power on.
A high efficiency cooling system. The power transistors are
mounted directly onto the heatsink, eliminating the high
thermal resistance of electrical insulators. This reduces
component temperatures and extends the life of the power
components.
Temperature proportional speed fans for quiet operation.
Front to back air flow.
Easy to clean air filter on the front.
