Russound D250LS Installation Manual

D250LS

2-Channel Power Amplier with Local Source Switching

Installation Manual

2 Russound D250LS Installation Manual Rev. 2

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 sucient 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

Read Instructions - All the safety and operating instructions 1.
should be read before the appliance is operated.

Retain Instructions - The safety and operating instructions

2.

should be retained for future reference.

Heed Warnings - All warnings on the appliance in the

3.

operating instructions should be adhered to.

Follow Instructions - All operating and user instructions

4.

should be followed.

Water and Moisture - The appliance should not be used near

5.

water; for example, near a bathtub, washbowl, kitchen sink,
laundry tub, in a wet basement, or near a swimming pool.
The apparatus shall not be exposed to dripping or splashing
liquids and no objects lled with liquids, such as vases, shall
be placed on the apparatus. Do not touch the appliance
with wet hands . Do not handle the appliance or power cord
with wet or damp hands. If water or any other liquid enters
the appliance cabinet , take it to qualied service p ersonnel
for inspec tion.

SAFETY INSTRUCTIONS

Cleaning - The appliance should be cleaned only as 6.
recommended by the manufacturer. From time to time you
should wipe o the front and side panels and the cabinet
with a soft cloth. Do not use rough material, thinners, alcohol
or other chemical solvents or cloths since this may damage
the nish or remove the panel lettering.

Ventilation - The appliance should be situated so that

7.

its location or position does not interfere with its proper
ventilation. For example, the appliance should not be
situated on a bed, sofa, rug, or similar surface that may
block the ventilation openings, or placed in a built-in
installation, such as a bookcase or cabinet that may impede
the ow of air through the ventilation openings. Place the
unit in a well-ventilated location, leaving at least 2 inches
(5 cm) of clearance on all sides, top and rear of unit for air
ow. If ventilation is blocked, the unit may overheat and
malfunction.

Heat - The appliance should be situated away from heat

8.

sources such as radiators, heat registers, stoves, or other
appliances (including ampliers) that produce heat.

Grounding or Polarization - Precaution should be taken so

9.

that the grounding or polarization means of an appliance is
not defeated.

Power Cord Protection - Power supply cords should be

10.

routed so that they are not likely to be walked on or pinched
by items placed upon or against them, paying particular
attention to cords at plugs, receptacles, and the point where
they exit from the appliance.

Power Sources - The appliance should be connected to a

11.

power supply only of the type described in the operating
instructions or as marked on the appliance.

Main Power Disconnect - The power switch is a single-pole

12.

switch. When the switch is in the “O” position, the appliance
is not completely disconnected from the main power. The
main power plug is used as the disconnect device and shall
remain readily operable. When installing the product, ensure
that the plug is easily accessible.

Non-Use Periods - The power cord of the appliance should

13.

be unplugged from the outlet when left unused for a long
period of time.

Attachments - Only use attachments/accessories specied

14.

by the manufacturer.

Carts and Stands - The appliance should

15.

be used only with a cart or stand that is
recommended by the manufacturer. An

appliance and cart combination should be moved with care.
Quick stops, excessive force and uneven surfaces may cause
the appliance and cart combination to overturn.

Wall or Ceiling Mounting - The appliance should be

16.

mounted to a wall or ceiling only as recommended by the
manufacturer.

Location of the Amplier - Do not mount this unit under a

17.

kitchen cabinet. Do not expose the amplier to direct sun
light or heating units as the amplier internal components’
temperature may rise and shorten the life of the components.
Avoid damp and dusty places.

Object and Liquid Entr y - Care should be taken so that

18.

objects do not fall and liquids are not spilled into the
enclosure through the openings.

Servicing - The user should not attempt to service the

19.

appliance beyond that described in the operating
instructions. All other servicing should be referred to
qualied service personnel.

Damage Requiring Service - The appliance should be

20.

serviced by qualied service personnel when: A. The power
supply cord or the plug has been damaged; B. Objects have
fallen, liquid has been spilled into the appliance; C. The
appliance has been exposed to rain; or D. The appliance does
not appear to operate normally; or E. The appliance has been
dropped or the enclosure is damaged.

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 REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.

Note: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause har mful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment o
and on, the user is encouraged to try to correct the interference by one of or
more of the following measures: reorient or relocate the receiving antenna;
increase the separation between the equipment and receiver; connect the
equipment into an outlet on a circuit dierent from that to which the receiver
is connected, or consult the dealer or an experienced radio/TV technician for
help.

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme NMB-003
du Canada.

3

Russound D250LS Installation Manual

Rev. 2

4 Russound D250LS Installation Manual Rev. 2

Introduction

The Russound D250LS is a 2-channel power amplier with automatic local
source switching capability. The D250LS allows a local source (e.g., PC or TV in
the bedroom) to automatically override the speakers in that particular zone of
a distributed audio system. This can be accomplished with a variety of input/
trigger options for versatility in many dierent applications.

The D250LS is rated at 50 watts per channel into 8 ohms and 75 watts per
channel into 4 ohms. With the Stereo/Bridge Mono switch in the Bridge Mono
position, both amplier channels are combined for a higher powered mono
output. In bridged mode the D250LS is rated at 150 watts of power into a single
8-ohm load. Each amplier output channel incorporates robust protection
circuitry for safety and reliability under extreme circumstances.

Thermal Protection

All Russound ampliers are designed with special circuitry to safeguard the
amplier under a thermal overload condition. Thermal protection mode can
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 amplier. If this fault occurs, turn o the
amplier, and check that the speaker impedance rating is above the minimum
rating. Also check for adequate ventilation around the amplier and make
adjustments if necessary.

Once the unit has cooled to safe operating temperatures, the amplier may
be powered back on.

Protection Circuitry

All Russound ampliers are designed with special circuitry to safeguard the
amplier under a short-circuit condition. A faulty speaker can also cause a
short circuit condition. If this fault condition occurs, turn o the amplier and
check speakers for short circuit conditions when appropriate.

PRODUCT OVERVIEW