P75 Dual Source Power Amplifier
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 flash 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 sufficient 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 amplifiers) 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 fit 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 specified by the manufacturer.
12.Carts and Stands - Use only with the cart, stand,
tripod, bracket or table specified 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 qualified 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 - 
Class II apparatus with double insulation, and no protective earth provided.
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Russound P75 Installation Manual |
CLEARANCE REQUIREMENTS / TABLE OF CONTENTS
Clearance Requirements
When installing the P75 Amplifier, the clearances shown here MUST be kept for proper ventilation of the amplifier.
Table of Contents |
|
Safety Instructions .................................................................................................................. |
2 |
Product Overview .................................................................................................................. |
4 |
Front and Rear Panels ............................................................................................................ |
5 |
System Configuration - Stereo Mode............................................................................... |
6 |
System Diagram - Stereo Mode.......................................................................................... |
7 |
System Configuration - Bridged Mode............................................................................ |
8 |
System Configuration - Basic Speaker Connection..................................................... |
9 |
System Configuration - External Volume Controls...................................................... |
9 |
Technical Specifications...................................................................................................... |
10 |
Warranty ................................................................................................................................... |
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Russound P75 Installation Manual |
3 |
PRODUCT OVERVIEW
Introduction
The Russound P75 is a 2-channel dual source power amplifier 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 amplifier 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 amplifier 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 amplifier output channel incorporates robust protection circuitry for reliability and safety.
Thermal Protection
P75 amplifiers is designed with special circuitry to safeguard the amplifier 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 amplifier. In thermal protection mode the amplifier will automatically stop output. If this fault occurs, turn off the amplifier, and check that the speaker impedance rating is above the minimum rating. Also check for adequate ventilation around the amplifier and make adjustments if necessary. Once the unit has cooled to safe operating temperatures, the amplifier may be powered back on.
Protection Circuitry
Special circuitry has been designed into the amplifier to safeguard under a short-circuit condition. A faulty speaker can also cause a short circuit condition. If this fault condition occurs, turn off the amplifier and check speakers for short circuit conditions when appropriate.
Installation
The P75 amplifier 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 amplifier 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 off.
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 amplifier 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 amplifier can be turned on manually or automatically by setting a switch on the back panel. For manual power on or off, 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 amplifier's signal sensing sends a command for it to power on. Once the signal ends, the amplifier turns off.
Speaker Cable
When connecting speakers to the P75 amplifier, use a minimum 16 gauge and maximum 12 gauge stranded copper cable. Avoid leaving stray strands and keep polarity consistent.
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Russound P75 Installation Manual |
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