American Audio Stereo Amplifier Vplus Series User Manual

Professional Power Amplifiers  
 
 
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AMERICAN AUDIO®  
4295 Charter Street  
Los Angeles Ca. 90058  
User Instructions  
Revised 12/03  
 
CAUTION  
Do not open -  
risk of electric shock  
POUR ASSURER LA FIABILETE ET  
OBTENIT UNE PERFORMANCE OPTIMALE,  
NESOUMETTE JAMAIS LAMPLIFICATEUR  
A UNE CHARGE D’IMPEDANCE TOTALE  
INFERIEURE A 2 OHMS, NI AVEC UN H.P. NI  
EN COMBINAISON DES H.P.  
FOR OPTIMUM PERFORMANCE AND  
RELIABILITY DO NOT PRESENT THE  
AMPLIFIER WITH A SPEAKER LOAD  
OF LESS THAN 2 OHMS OR ANY  
COMBINATION OF SPEAKERS THAT  
TOGETHER ARE LESS THAN 2 OHMS!  
CAUTION: TO REDUCE THE RISK OF ELECTRIC  
SHOCK, DO NOT REMOVE THE COVER.  
THERE ARE NO USER SERVICEABLE PARTS  
INSIDE. REFER ALL SERVICE TO YOUR  
AUTHORIZED AMERICAN AUDIO® DEALER.  
The lightning flash with an arrow triangular  
symbol is intended to alert the user to the  
presence of non insulated “dangerous volt-  
age” within the products enclosure, and  
may be of sufficient magnitude to consti-  
tute a risk of electric shock.  
AVEC UN H.P., IL FAUT UNE CHARGE  
D’IMPEDANCE MINIMUM DE 2 OHMS.  
USING ONE SPEAKER, IT MUST BE  
RATED AT 4 OR MORE OHMS.  
USING TWO SPEAKERS, THEY MUST  
RATED EACH AT 4 OR MORE OHMS.  
AVEC DEUX H.P., FAUT POUR CHAOUN UNE  
CHARGE D’IMPEDANCE MINIMUM DE 4  
OHMS.  
The exclamation point triangular symbol is  
intended to alert the user to the presence  
of important operating and maintenance  
(servicing) instructions in the user manual  
accompanying the amplifier.  
USING THREE SPEAKERS, THEY  
MUST BE RATED EACH AT 8 OR  
MORE OHMS.  
AVEC TROIS H.P., FAUT POUR CHAOUN UNE  
CHURGE D’IMPEDANCE MINIMUM DE 8  
OHMS.  
CONTENTS:  
Introduction...............................................................................................................................................................................................4  
FrontPanel....................................................................................................................................................................................................5  
Rear Panels  
V1000plus................................................................................................................................................................................................6  
V2000plus...............................................................................................................................................................................................7  
V3000plus..............................................................................................................................................................................................8  
Inputs...........................................................................................................................................................................................................9  
Outputs............................................................................................................................................................................................................9  
Operating Modes........................................................................................................................................................................................13  
Protection Circuitry  
Limiter................................................................................................................................................................................................13  
Short Circuit Protection....................................................................................................................................................................13  
ThermalProtection...........................................................................................................................................................................14  
LowCutFilter....................................................................................................................................................................................14  
Specifications...............................................................................................................................................................................................15  
American Audio® - www.americandj.com - Vplus Series Amplifiers Power Amplifier User Manual Page 3  
 
Important Precautions  
Introduction  
To reduce the risk of electrical shock or fire, do not expose this  
unit rain or moisture  
• Do not spill water or other liquids into or on to your unit  
• Do not attempt to operate this unit if the power cord has been  
frayed or broken  
• Do not attempt to remove or break off the ground prong from the  
electrical cord. This prong is used to reduce the risk of electrical  
shock and fire in case of an internal short  
• Disconnect main power before making any type of connection  
• Do not remove the cover under any conditions. There are no user  
serviceable parts inside  
Introduction: Congratulations and thank you for purchasing an  
American Audio® Vplus series amplifier. This amplifier is a represen-  
tation of American Audio’s continuing commitment to produce the  
best and highest quality audio products at an affordable price. These  
amplifiers are designed to provide a big impact in sound reproduc-  
tion. Please read and understand this manual completely before  
attempting to operate your new amplifier. This booklet contains  
important information concerning the proper and safe operation of  
your new amplifier.  
Unpacking: Every Vplus series amplifier has been thoroughly tested  
and has been shipped in perfect operating condition. Carefully check  
the shipping carton for damage that may have occurred during ship-  
ping. If the carton appears to be damaged, carefully inspect your unit  
for any damage and be sure all accessories necessary to operate  
the system have arrived intact. In the event damage has been found  
or parts are missing, please contact our toll free customer support  
number for further instructions. Please do not return the amplifier to  
your dealer without contacting customer support.  
• Never plug this unit in to a dimmer pack  
• Always be sure to mount this unit in an area that will allow proper  
ventilation. Allow about 6” (15cm) between this device and a wall  
• Do not attempt to operate this unit, if it becomes damaged  
• This unit is intended for indoor use only, use of this product out-  
doors voids all warranties  
• During long periods of non-use, disconnect the unit’s main power  
• Always mount this unit in a safe and stable manner  
• Power cords should be routed so they are not likely to be walked  
on, pinched by items placed upon or against them.  
• Cleaning -The outside of the unit should be wipe down with a soft  
cloth and mild cleaner when needed.  
• Heat -The amplifier should be situated away from heat sources  
such as radiators, heat registers, stoves, or other appliances  
(including amplifiers) that produce heat.  
• The fixture should be serviced by qualified service personnel when:  
A. The power-supply cord or the plug has been damaged.  
B. Objects have fallen, or liquid has been spilled into the unit.  
C. The appliance has been exposed to rain or water.  
D. The fixture does not appear to operate normally or exhibits a  
marked change in performance.  
Installation: This amplifier is designed to mount into a standard 19”  
rack. The front panel provides four holes used to screw the unit into  
a rack. The unit also provides a way to rear mount the unit into a  
rack for added security. Rear mounting the unit is especially recom-  
mended if the unit is to mounted into a mobile rack.  
Customer Support: American Audio® provides a toll free customer  
support line, to provide set up help and to answer any question  
should you encounter problems during your set up or initial opera-  
any comments or suggestions. For service related issue please con-  
tact American Audio®. Service Hours are Monday through Friday 9:  
00 a.m. to 5:00 p.m. Pacific Standard Time.  
Voice:  
Fax:  
(800) 322-6337  
(323) 582-2610  
E-mail:  
American Audio® - www.americandj.com - Vplus Series Amplifiers Power Amplifier User Manual Page 4  
 
CONTROLS AND FUNCTIONS  
FRONT PANEL  
1
2
3
4 5  
6
7
8
 
 
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Diagram 1  
9
10 11  
12 13  
9
1. Power Switch - This switch controls the units main power.  
7. Channel 2 Clip Indicator - This red LED will begin to flash when  
channel two begins to overload (clip). At this point channel one will be-  
gin to distort. Under heavy clipping activity lower the channel one gain  
control to reduce the risk of damage to your speakers and amplifier. This  
LED may glow when the unit has been turned off, this is normal.  
2. Channel 1 Limiter Switch (V2000 & V3000 Only) - This is used  
to activate the channels built-in limiter. The limiter reduces the average  
output level when the signal begins to distort, this process is designed  
to reduce distortion and protect the speakers. See limiter page 12.  
8. Channel 2 Limiter Switch (V2000 & V3000 Only) - This is used  
to activate the channels built-in limiter. The limiter reduces the average  
output level when the signal begins to distort, this process is designed  
to reduce distortion and protect the speakers. See limiter page 12.  
3. Channel 1 Clip Indicator - This red LED will begin to flash when  
channel one begins to overload (clip). At this point channel one will be-  
gin to distort. Under heavy clipping activity lower the channel one gain  
control to reduce the risk of damage to your speakers and amplifier. This  
LED may glow when the unit has been turned off, this is normal.  
9. Cooling Vents - These vents are used for proper cooling. Never  
block these vents and keep them clean at all times.  
4. Channel 1 Protect Indicator - The red Protect LED will begin to  
glow when the channel goes into protect mode. When the channel goes  
into protect mode all output for that channel will turn off. This is to pro-  
tect any speakers connected to the channel.  
10. Channel 1 Gain Control - This rotary knob is used to control the  
output signal of channel one. Turning the knob in a clockwise direction  
will increase signal output.  
5. Power Indicator - This blue LED will glow when main power is ap-  
plied to the unit. This light may continue to glow briefly after main power  
has been turned off, this is normal.  
11. Channel 1 Signal Indicators - These green and yellow LED’s will  
glow according to the average signal output.  
12. Channel 2 Signal Indicators - These green and yellow LED’s will  
glow according to the average signal output.  
6. Channel 2 Protect Indicator - The red Protect LED will begin to  
glow when the channel goes into protect mode. When the channel goes  
into protect mode all output for that channel will turn off. This is to pro-  
tect any speakers connected to the channel.  
13. Channel 2 Gain Control - This rotary knob is used to control the  
output signal of channel two. Turning the knob in a clockwise direction  
will increase signal output.  
American Audio  
®
- www.americandj.com - Vplus Series Amplifiers Power Amplifier User Manual Page 5  
 
V1000plus REAR PANEL  
1
2
3
4
5
6
WARNING: TO REDUCE THE  
RISK OF FIRE OR ELECTRICAL  
SHOCK DO NOT EXPOSE THIS  
EQUIPMENT TO RAIN OF MOIS-  
TURE  
PROFESSIONAL POWER AMPLIFIER  
CAUTION  
4 OHMS MINIMUM IMPEDANCE PRE CHANNEL  
6
A
M
P
4 OHMS MINIMUM IMPEDANCE IN MONO BRIDGE MODE  
AVIS: RISQUE DE CHOC ELECT-  
TRIQUE - NE PAS OUVRIR.  
BRIDGE  
MONO  
-
+
CH 1  
120V~60Hz  
CH 2  
INPUT  
CH 2  
INPUT  
CH 1  
1000 WATTS  
+
P2 P3 P1  
-
+
+
-
STEREO BRIDGE  
OUTPUT  
Diagram 2  
7
8
1. Channel 2 Input -  
Connect your channel two speakers to channel two output.  
Connect the input source for channel two to either the balance  
XLR or the balanced/unbalanced 1/4” input jacks. The 1/4” TRS  
plug is configured as follows; Tip is positive, Ring is negative  
and Sleeve is ground. The XLR jack is configured as follows; Pin  
three positive, pin two negative, pin one ground. See page 9 for  
more details on input configuration.  
5. Channel 1 Speaker Output - 5 Way Binding Post -  
Connect your channel one speakers to channel one output.  
6. Circuit Breaker -  
This breaker is designed to protect the amplifier and your speak-  
ers in the event of an AC overload. In the event of an electrical  
overload the breaker will pop-out. To reset the breaker, push it in.  
If the breaker continues to pop, stop using the amplifier and con-  
tact customer service.  
2. Channel 1 Input -  
Connect the input source for channel one to either the balance  
XLR or the balanced/unbalanced 1/4” input jacks. The 1/4” TRS  
plug is configured as follows; Tip is positive, Ring is negative  
and Sleeve is ground. The XLR jack is configured as follows; Pin  
three positive, pin two negative, pin one ground. See page 9 for  
more details on input configuration.  
7. Mono-Bridge/Stereo Selectable Switch -  
This switch changes the amplifier operating mode from either  
stereo or mono bridge. Amplifiers arrive to you preset in the ste-  
reo operation mode.  
8. A/C Power Input -  
3. Cooling Fan -  
Plug this cable in to a standard 110~120v wall outlet. Be sure  
that supplied voltage matches that of the required voltage of you  
amplifier. Never plug your amplifier in to a wall outlet that does  
not match the required voltage of your amplifier, serious damage  
may occur to your unit.  
This is a dual speed cooling fan. This fan is used to cool the  
internal parts of the amplifier when in use. Never block the fan  
in any way or mount in an enclose rack, doing so may cause the  
amplifier to overheat and fail.  
4. Channel 2 Speaker Output - 5 Way Binding Post -  
American Audio® - www.americandj.com - Vplus Series Amplifiers Power Amplifier User Manual Page 6  
 
V2000plus REAR PANEL  
1
2
3
4
5
6
1
1
2
3
4
Diagram 3  
7
8
9
10  
11  
12  
This holder houses the external fuse. Always replace with the exact  
same type fuse unless otherwise instructed by an authorized American  
Audio® technician.  
1. Cooling Fan -  
Dual speed cooling fans. These fans are used to cool the internal parts  
of the amplifier. Never block the fan grills in any way or mount in an en-  
close rack, doing so may cause the amplifier to overheat and fail.  
7. Channel 2 XLR THRU Jack -  
This jack is used to send a parallel signal from the channel two input  
2. Channel 2 Input -  
jacks to another device or amplifier.  
Connect the input source for channel two to either the balance XLR or the  
balanced/unbalanced 1/4” input jacks. The 1/4” TRS plug is configured  
as follows; Tip is positive, Ring is negative and Sleeve is ground. The  
XLR jack is configured as follows; Pin three positive, pin two negative,  
pin one ground. See page 9 for more details on input configuration.  
8. Channel 1 XLR THRU Jack -  
This jack is used to send a parallel signal from the channel one input  
jacks to another device or amplifier.  
9. Channel 2 Output Jack/5 way Binding Post -  
Connect to your speaker’s input jack. Red is positive signal and Black is  
negative signal.  
3. Low Cut Filter Mode Switches -  
These dip switches are used to active and adjust the built-in Low Cut  
Filter, see "Low Cut Filter" on page 14.  
10. Channel 1 Output Jack/5 way Binding Post -  
Connect to your speaker’s input jack. Red is positive signal and Black is  
negative signal.  
4. Channel 1 Input -  
Connect the input source for channel one to either the balance XLR or the  
balanced/unbalanced 1/4” input jacks. The 1/4” TRS plug is configured  
as follows; Tip is positive, Ring is negative and Sleeve is ground. The  
XLR jack is configured as follows; Pin three positive, pin two negative,  
pin one ground. See page 9 for more details on input configuration.  
11. Ground Lift Switch -  
This switch is used to disconnect the internal ground signal from the  
amplifier chassis ground. This may reduce the buzz that is caused from  
an electrical 60Hz cycle.  
5. Mono-Bridge/Stereo Selectable Switch -  
This switch changes the amplifier operating mode from either stereo or  
mono bridge. Amplifiers are shipped in stereo mode.  
12. A/C Power Input -  
Plug this cable in to a standard 110~120v wall outlet. Never plug your  
amplifier in to a wall outlet that does not match the required voltage of  
your amplifier, serious damage may occur to your unit.  
6. Fuse Holder -  
American Audio® - www.americandj.com - Vplus Series Amplifiers Power Amplifier User Manual Page 7  
 
V3000plus REAR PANEL  
1
2
3
4
5
6
7
8
9
1
1
2
3
4
Diagram 4  
10  
11  
12  
13  
14  
15  
16  
1. Cooling Fan - Dual speed cooling fans. This fans are used to cool the  
internal parts of the amplifier when in use. Never block the fan grills in  
any way or mount in an enclose rack, doing so may cause the amplifier  
to overheat and fail.  
9. Fuse Holder - This holder houses the external fuse. Always replace  
with the exact same type fuse unless otherwise instructed by an autho-  
rized American Audio® technician.  
10. Channel 2 XLR THRU Jack - This jack is used to send a parallel  
2. Channel 2 Subwoofer Mode On/Off Switch - This switch activates  
signal from the channel two input jacks to another device or amplifier.  
the amplifier subwoofer mode for channel two.  
11. Channel 1 XLR THRU Jack - This jack is used to send a parallel  
3. Channel 2 Frequency Adjustment. - This pot is used to adjust the  
signal from the channel one input jacks to another device or amplifier.  
frequency response when running channel two in subwoofer mode.  
12. Channel 2 Output Jack/5 way Binding Post - Connect to your  
4. Channel 2 Input - Connect the input source for channel two to either  
the balance XLR or the balanced/unbalanced 1/4” input jacks. See page  
9 for more details on input configuration.  
speaker’s input jack. Red is positive signal and Black is negative signal.  
13. Channel 1 Output Jack/5 way Binding Post - Connect to your  
speaker’s input jack. Red is positive signal and Black is negative signal.  
5. Low Cut Filter Mode Switches - These dip switches are used to  
activate and adjust the built-in Low Cut Filter, see "Low Cut Filter" on  
page 14.  
14. Ground Lift Switch - This switch is used to disconnect the internal  
ground signal from the amplifier chassis ground. This may reduce the  
buzz that is caused from an electrical 60Hz cycle.  
6. Channel 1 Input - Connect the input source for channel one to either  
the balance XLR or the balanced/unbalanced 1/4” input jacks. See page  
9 for more details on input configuration.  
15. Channel 1 Subwoofer Mode On/Off Switch - This switch activates  
the amplifier subwoofer mode for channel one.  
16. A/C Power Input - Plug this cable in to a standard 110~120v wall  
outlet. Be sure that supplied voltage matches that of the required volt-  
age of you amplifier. Never plug your amplifier in to a wall outlet that  
does not match the required voltage of your amplifier, serious damage  
may occur to your unit.  
7. Channel 1 Frequency Adjustment.- This pot is used to adjust the  
frequency response when running channel two in subwoofer mode.  
8. Mono-Bridge/Stereo Selectable Switch - This switch changes the  
amplifier operating mode from either stereo or mono bridge. Amplifiers  
are shipped in stereo mode.  
American Audio® - www.americandj.com - Vplus Series Amplifiers Power Amplifier User Manual Page 8  
 
Set Up  
INPUTS - The Vplus series amplifiers allows you to use two types of input connectors per a channel, a XLR jack for balanced con-  
nections and a 1/4” female jack that will accept balanced and unbalanced connectors. Use these connections to connect the output  
signal from a mixer, cross-over or EQ to your Vplus series amplifier. A balanced connection is recommended for cable runs longer  
that 20ft. When constructing your own XLR cables follow the pin configuration describe below for proper connections. For cable runs  
shorter than 20ft. you may choose the 1/4” unbalanced input option. The 1/4” unbalanced input option may be more convenient for  
most users due to the abundant supply of prefabricated cables available at your local audio dealer. You may use the two XLR “Input  
Thru” jacks to jump a parallel connection to another amplifier or other device. For Example: Connect a XLR cable to the input of chan-  
nel one. You may now connect a XLR cable from the channel one “Input Thru” jack to the input jack of another amplifier’s channel one  
input. This will reduce the use of “Y” cables.  
 
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US ITT Standard  
2
1
Diagram 5  
Diagram 6  
3
Diagram 7  
Hot (+)  
Negative (-)  
Ground/Shield  
Hot (+)  
2 Hot (+ data)  
3 Negative (- data)  
1 Ground/Return/ 0v)  
Negative (-)  
OUTPUTS:  
Binding Post/Banana Plug - Connect your speakers to the binding post outputs on the rear of the amplifier. The  
speaker wire may be connect by bare wire (directly connected, usually for permanent connections), banana plug,  
or spade connector. Connections are made to Channels 1 and 2 output’s for stereo mode or across the red termi-  
nals of Channels 1 and 2 for Mono Bridge Mode.  
Important Notice: Although a speaker will operate with the positive and negative leads plugged into either termi-  
nal on the amplifier binding post, be sure to plug the negative lead into the black terminal and positive lead into  
the red terminal. Ensuring proper polarity will avoid speakers being out of phase, that can cause a loss of bass  
response.  
Diagram 8  
Important Notice: Banana Plugs - When connecting your speakers to the amplifier using banana jacks; Be sure that the red and black  
caps on the binding post are completely screwed in. Insert the banana jacks into the caps of the binding post, be sure that the banana  
jack is inserted securely to avoid the risk of it popping out.  
American Audio® - www.americandj.com - Vplus Series Amplifiers Power Amplifier User Manual Page 9