Russound AP-48 User manual

A/V DISTRIBUTION & CONTROL SYSTEMS
AP-48
Instruction Manual
POWER
AP-48
Eight Channel
Power Amplifier

1. Safety Instructions
“WARNING” “TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLI-
ANCE TO RAIN OR MOISTURE.”
“CAUTION” “TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER. NO USER -
SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an equi-
lateral triangle, is intended to alert the user to the presence
of uninsulated “dangerous voltage”within the products
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 lit-
erature accompanying the appliance.
Safety Instructions
1. Read Instructions - All the safety and operating instructions should
be read before the appliance is operated.
2. Retain Instructions - The safety and operating instructions should be
retained for future reference.
3. Heed Warnings - All warnings on the appliance in the operating
instructions should be adhered to .
4. Follow Instructions - All operating and user instructions should be
followed.
5. Water and Moisture - The appliance should not be used near water -
for example, near a bathtub, washbowl, kitchen sink, laundry tub, in
a wet basement, or near a swimming pool, and the like.
6. Carts and Stands - The appliance should 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.
7. Wall or ceiling Mounting - The appliance should
be mounted to a wall or ceiling only as recom-
mended by the manufacturer.
8. Ventilation - The appliance should be situated so that 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
flow of air through the ventilation openings. Place the AP-48 in a
well-ventilated location, leaving at least 2 inches (5cm) of clearance
on all sides, top and rear of unit for air flow. If ventilation is blocked,
the AP-48 may overheat and malfunction.
9. Heat - The appliance should be situated away from heat sources
such as radiators, heat registers, stoves, or other appliances ( includ-
ing amplifiers ) that produce heat.
10. Power Sources - The appliance should be connected to a power
supply only of the type described in the operating instructions or as
marked on the appliance.
11. Grounding or Polarization - The precautions that should be taken so
that the grounding or polarization means of an appliance is not
defeated .
12. Power - Cord Protection - Power supply cords should be 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.
13. Cleaning - The appliance should be cleaned only as recommended
by the manufacturer.
14.
Non-use Periods - The power cord of the appliance should be
unplugged from the outlet when left unused for a long period of time.
15. Object and Liquid Entry - Care should be taken so that objects do
not fall and liquids are not spilled into the enclosure through the
openings.
16. Damage Requiring Service - The appliance should be serviced by
qualified service personnel when:
A. The power - supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled into the appli-
ance; or
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.
17. Servicing - The user should not attempt to service the appliance
beyond that described in the operating instructions. All other servic-
ing should be referred to qualified service personnel.
Precautions
1. Warranty Card –The serial number appears on the rear panel of this
unit near the power cord. Copy the serial number onto your warranty
card and mail it back to Russound I FMP, Inc. 5 Forbes Road
Newmarket, New Hampshire 03857. Be sure to retain a copy and
keep it in a safe place.
2. Power –WARNING - BEFORE TURNING ON THE POWER FOR
THE FIRST TIME , READ THE FOLLOWING SECTION CAREFULLY.
All models are designed for use only with the power supply voltage of
the region where they are sold. USA and Canadian: AC 120V, 60Hz
A label located at the rear panel power connection indicates the AC
power input for the unit. For use in the USA and Canada the label
will read AC 120V, 60Hz.
3. Do Not Touch The AP-48 With Wet Hands. Do not handle the AP-48
or power cord when your hands are wet or damp. If water or any
other liquid enters the AP-48 cabinet, take the AP-48 to qualified ser-
vice personal for inspection.
4. Location of the AP-48 - Do not expose the AP-48 to direct sun light or
heating units as the AP-48 internal components temperature may rise
and shorten the life of the components. Avoid damp and dusty places
.
5. Care –From time to time you should wipe off the front and side pan-
els 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 finish or remove the panel lettering.
Contents
1. Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Product Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5. Back Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7. Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2

2. Product Overview
The AP-48 Eight Channel Power Amplifier is capable of amplifying four stereo line-Ievel audio sources (CD players, tape decks, pream-
plifiers, tuners, etc...) simultaneously in multi-zone, multi-source installations. The eight amplifiers are arranged in pairs to provide four
stereo amplifiers. A line level bus is provided to allow two or more of the stereo amplifiers to share the same audio source. With one of
the four mono/stereo selector switches in the mono position, two amplifiers can serve as mono outputs. The AP-48 is ideal for applica-
tions that require multi-source amplification, while keeping cost and space requirements to a minimum.
3. Features
The AP-48 power output per channel is a constant 56 watts into an 8 ohm load and 62 watts into a 4 ohm load. This power output is
backed up by a very large power supply that can provide the current and voltage required when all amplifiers are on at full output. All 8
amplifiers are attached to two large heat sinks to allow the amplifiers to run at high outputs for extended periods of time without the
internal thermal protection activating. Each of the four stereo amplifiers can be switched to select the audio from the main bus input or
from the individual line input. Each of the four stereo amplifiers can be set to play in mono or stereo mode by a switch located onthe
back of the AP-48. This will allow stereo in specific zones while mono is in another zone, although the same source is playing. Each
amplifier has independent thermal and short circuit protection to allow the problem amplifier to shut down while the remaining ampli-
fiers continue to operate. Russound's AP-48 is proudly manufactured in the USA at our facility in Newmarket, NH.
4. Front Panel
•Power Switch turns on the
main power for the amplifier.
•Power On LED will be illuminated
when the power is on.
5. Back Panel
•Main Bus Input is a bus input that is available at all four amplifiers by setting the bus/line switch to bus.
•MainBus Output is used to loop out the main bus audio signal.
•Line/Bus Switch is used to select the audio input from either the dedicated line input or the main bus input.
•Stereo/Mono Switchis used to select stereo or mono for the selected amplifier.
•Line Input is an input specifically for the associated amplifier. This signal is not shared by the other amplifiers.
•Speaker connection is a detachable connector that can be wired with a wire size of up to 12 AWG.
•10 Amp Rail Fuses are used to protect each of the + and - power rails. These fuses can only be replaced by a 10 Amp AGC 32V
fuses. Fuse replacement should only be done when the power plug is removed from the amplifier.
•Three-Prong A/C Receptacle is used to accept the heavy-duty three-prong 6' power cord included with the amplifier.
3
POWER
AP-48
L
R
MAIN
BUS
INPUT
MAIN
BUS
OUTPUT
FUSE
10 AMP FUSE 10 AMP
L
R
LINE INPUT SPEAKERS
4 OHM MIN
AMP OUT
L+ L- R- R+
BUS
LINE
MONO
STEREO
L
R
LINE INPUT SPEAKERS
4 OHM MIN
AMP OUT
L+ L- R- R+
BUS
LINE
MONO
STEREO
L
R
LINE INPUT SPEAKERS
4 OHM MIN
AMP OUT
L+ L- R- R+
BUS
LINE
MONO
STEREO
L
R
LINE INPUT SPEAKERS
4 OHM MIN
AMP OUT
L+ L- R- R+
BUS
LINE
MONO
STEREO
LINE/BUS
SWITCH STEREO/MONO OR MONO
THREE-PRONG
AC RECEPTACLE
RAIL FUSES
MAIN BUS
INPUT MAIN BUS OUTPUT LINE INPUT SPEAKER CONNECTIONS

6. Specifications
Line inputs: (main bus input & line input).
Maximum input level 10 volts. THD .01% 20Hz to 20KHz.
Input Impedance 39k.
Input can be from a CD, tape, preamp etc...
Audio power output: (Speaker output)
62 RMS W/ch, @ 4 ohms (20Hz to 20KHz) with no more than .06% THD.
56 RMS W/ch, @ 8 ohms (20Hz to 20KHz) with no more than .06% THD.
Power requirements: USA & Canada only. AC 120 Volts 60Hz 10 AMPS.
Dimensions: 17"W x 12"D x 4.1”H
Weight: 26 Ibs.
ETL Compliance: The AP-48 has been tested and examined and found to comply to
UL 1492 and CSA c22.2 No. 1-M94.
7. Warranty
The Russound AP-48 is fully guaranteed for Two (2) years from the date of purchase against all defects in materials and workmanship.
During this period Russound will replace any defective parts and correct any defect in workmanship without charge for either parts or
labor. For this warranty to apply, the unit must be installed and used according to its written instructions. If service is necessary , it must
be performed by Russound. The unit must be returned to Russound at the owners expense and with prior written permission. Accidental
damage and shipping damage are not considered defects under the terms of the warranty. Russound assumes no responsibility for
defects resulting from abuse or servicing performed by an agency or person not specifically authorized in writing by Russound. Damage
to or destruction of components due to improper use voids the warranty. In these cases the repair will be made at the owners expense.
To return for repairs, the unit must be shipped to Russound at the owners expense, along with a note explaining the nature of the ser-
vice required. Be sure to pack in a corrugated container with at least 3 inches of resilient material to protect the unit from damage in
transit. Russound Inc.
A/V DISTRIBUTION & CONTROL SYSTEMS
5 Forbes Rd. Newmarket, NH 03857
☎ 603.659.5170 •Fax [phone]
e-mail: [email protected]
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