Russound P75 User Manual
P75 Dual Source Power Amplier
Installation Manual
SAFETY INSTRUCTIONS
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE THE COVER. NO USERSERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL.
WARNING: TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE. THIS APPLIANCE SHALL
NOT BE EXPOSED TO DRIPPING OR SPLASHING
WATER AND THAT NO OBJECT FILLED WITH
LIQUID SUCH AS VASES SHALL BE PLACED ON
APPARATUS..
The lightning ash with arrowhead symbol,
within an equilateral triangle, is intended to alert
the user to the presence of uninsulated dangerous
voltage within the product’s enclosure that may be of
sucient magnitude to constitute a risk of electric shock
to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and maintenance
(servicing) instructions in the literature accompanying the
appliance.
Safety Instructions
1. Read These Instructions - All the safety and operating
instructions should be read before the appliance is
operated.
2. Keep These Instructions - The safety and operating
instructions should be retained for future reference.
3. Heed All Warnings - All warnings on the appliance in
the operating instructions should be adhered to.
4. Follow All Instructions - All operating and user
instructions should be followed.
5. Water and Moisture - Do not use this apparatus
near water; for example, near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement, or near
a swimming pool.
6. Cleaning - The apparatus should be cleaned only with
a dry cloth.
7. Ventilation - Do not block any ventilation openings.
Install in accordance with the manufacturer's
instructions. Slots and openings in the cabinet
are provided for ventilation and to ensure reliable
operation of the product and to prevent it from
overheating, and these openings must not be
blocked or covered. The openings should never be
blocked by placing the product on a bed, sofa, rug,
or other similar surface. This product should not be
placed in a built-in installation, such as a bookcase
or rack unless proper ventilation is provided or the
manufacturer's instructions have been adhered to.
8. Heat - Do not install near any heat sources such as
radiators, heat registers, stoves or other apparatus
(including ampliers) that produce heat.
9. Grounding or Polarization - Do not defeat the safety
purpose of the polarized alternating current line plug
or grounding-type plug. A polarized plug has two
blades with one wider than the other. This plug will
t into the power outlet only one way. This is a safety
feature. A grounding-type plug has two blades and
a third grounding prong. The wide blade or the third
prong are provided for your safety. If you are unable
to insert the provided plug into your outlet, contact
your electrician to replace the obsolete outlet.
10. Power Cord Protection - Protect the cord from
being walked on or pinched particularly at plugs,
convenience receptacles, and the point where they
exit from the apparatus.
11. Attachments - Only use attachments/accessories
specied by the manufacturer.
12. Carts and Stands - Use only with the cart, stand,
tripod, bracket or table specied by the manufacturer,
or sold with the apparatus. When a cart
is used, use caution when moving the
cart/apparatus combination to avoid
injury from tip-over.
13. Non-Use Periods - Unplug this
apparatus during lightning storms or
when unused for long periods of time.
14. Servicing - Refer all servicing to qualied service
personnel. Servicing is required when the apparatus
has been damaged in any way, such as power supply
cord or plug is damaged, liquid has been spilled or
objects have fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does not
operate normally, or has been dropped.
15. MAINS Plug - The MAINS plug or an appliance coupler
is used as the disconnect device, the disconnect
device shall remain readily operable.
16. Insulation insulation, and no protective earth provided.
Class II apparatus with double
2 Russound P75 Installation Manual
When installing the P75 Amplier, the clearances shown here MUST be kept
for proper ventilation of the amplier.
CLEARANCE REQUIREMENTS / TABLE OF CONTENTS
Table of ContentsClearance Requirements
Safety Instructions ..................................................................................................................2
Product Overview ..................................................................................................................4
Front and Rear Panels ............................................................................................................ 5
System Conguration - Stereo Mode ............................................................................... 6
System Diagram - Stereo Mode..........................................................................................7
System Conguration - Bridged Mode ............................................................................ 8
System Conguration - Basic Speaker Connection .....................................................9
System Conguration - External Volume Controls ...................................................... 9
Technical Specications ......................................................................................................10
Warranty ...................................................................................................................................11
Russound P75 Installation Manual
3
PRODUCT OVERVIEW
Introduction
The Russound P75 is a 2-channel dual source power amplier with autosource switching. It features two audio line inputs with a loop out to another
zone, receiver, or device from the Line 2 source.
The P75 amplier is rated at 75 watts per channel into 4 ohms, and 60 watts
into 8 ohms. With the Stereo/Bridge Mono switch in Bridge Mono position,
both amplier channels are combined for a higher powered mono output. In
Bridge mode the P75 is rated at 160 watts of power into a single 8 ohm load.
Each amplier output channel incorporates robust protection circuitry for
reliability and safety.
Thermal Protection
P75 ampliers is designed with special circuitry to safeguard the amplier
under a thermal overload condition. Thermal protection mode will only engage
when the unit has been run at high volume for extended periods of time
without adequate ventilation and/or when speaker impedances are below the
minimum levels for the amplier. In thermal protection mode the amplier will
automatically stop output. If this fault occurs, turn o the amplier, and check
that the speaker impedance rating is above the minimum rating. Also check for
adequate ventilation around the amplier and make adjustments if necessary.
Once the unit has cooled to safe operating temperatures, the amplier may be
powered back on.
Protection Circuitry
Special circuitry has been designed into the amplier to safeguard under a
short-circuit condition. A faulty speaker can also cause a short circuit condition.
If this fault condition occurs, turn o the amplier and check speakers for short
circuit conditions when appropriate.
Installation
The P75 amplier can be placed on a shelf in an equipment rack, or on a table
or cabinet. Be sure to follow the required clearances shown on page 3 to allow
for ventilation and heat dissipation.
Front Panel Controls
On the front panel of the P75 amplier are the power button plus speaker
selector, a master balance and a master volume adjustment.
Power - the front panel switch will manually switch the power on or o.
Power LED indicator - RED = ON, AMBER = Standby,
No Light = Protection Mode
Speaker selector - select speaker pair A (main) or speaker pair B (auxiliary) for
audio output. You can use speakers A and B together, as long as the speakers
are at a minimum 8-ohm impedance.
Balance - adjust speaker output balance between right and left channels. The
default setting is at center.
Volume - adjust the speaker output volume. If using Bridged mode, set the
volume at minimum, then adjust to the desired level.
Unswitched Outlet
The P75 amplier has a built-in outlet on the back panel. This 120 VAC outlet
provides 400W unswitched power for a device such as a small powered
subwoofer. This switch provides power as long as the P75 is plugged into an
outlet, whether or not the unit itself is powered on.
Manual / Auto On
The P75 amplier can be turned on manually or automatically by setting a
switch on the back panel. For manual power on or o, press the Power button
on the front panel. For automatic power on, set the rear switch to Auto On, and
place the front panel power button in the "On" position. When music is sensed
on either input RCA connector, the amplier's signal sensing sends a command
for it to power on. Once the signal ends, the amplier turns o.
Speaker Cable
When connecting speakers to the P75 amplier, use a minimum 16 gauge and
maximum 12 gauge stranded copper cable. Avoid leaving stray strands and
keep polarity consistent.
4 Russound P75 Installation Manual
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