American Audio Stereo Amplifier VLP 2500 User Manual

Professional Power Amplifier  
VLP 2500  
User Instructions  
AmericAn Audio®  
6122 S. eastern Ave.  
Los Angeles ca. 90040  
rev. 9/10  
 
CaUtIon  
Do not open -  
risk of electric shock  
Pour ASSurer L A FiABiLe Te e T  
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:  
Safety Precautions.......................................................................................................................................................................................4  
introduction.................................................................................................................................................................................................4  
Front Panel...................................................................................................................................................................................................5  
rear Panel....................................................................................................................................................................................................6  
inputs...........................................................................................................................................................................................................7  
outputs............................................................................................................................................................................................................7  
Speakon output connector Assembly.......................................................................................................................................................9  
operating modes........................................................................................................................................................................................10  
Protection circuitry  
Limiter.................................................................................................................................................................................................11  
Short circuit Protection...................................................................................................................................................................11  
Thermal Protection..........................................................................................................................................................................12  
Amplifier Features.......................................................................................................................................................................................12  
Speaker Setup............................................................................................................................................................................................13  
Warranty.................................................................................................................................................................................................14  
Specifications...............................................................................................................................................................................................15  
©American Audio® - www.americanaudio.us - vLP 2500 Power Amplifier user manual Page 3  
 
Important Precautions  
Introduction  
To reduce the risk of electrical shock or fire, do not expose this Introduction: congratulations and thank you for purchasing this  
unit rain or moisture.  
American Audio® vLP 2500 amplifier. This amplifier is a represen-  
tation of American Audio’s continuing commitment to produce the  
best and highest quality products all at an affordable price. Please  
read and understand this manual completely before attempting  
to operate your new amplifier. This booklet contains important  
• 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 elec- information concerning the proper and safe operation of your new  
trical 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.  
amplifier.  
Unpacking: every vLP 2500 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 shipping. if the carton appears to be damaged, carefully  
inspect your unit for any damage and be sure all accessories nec-  
essary to operate the unit has 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 first.  
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.  
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 espe-  
cially recommended for this amplifier if the unit is to mounted into  
a mobile rack.  
• 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.  
Customer support: American Audio® provides a toll free custom-  
er support line, to provide set up help and to answer any question  
should you encounter problems during your set up or initial opera-  
tion. You may also visit us on the web at www.americanaudio.us  
for any comments or suggestions. For service related issue please  
contact American Audio®. Service Hours are monday through  
Friday 9:00 a.m. to 5:00 p.m. Pacific Standard Time.  
• Heat -The appliance 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 on, 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.  
voice: (800) 322-6337  
e-mail: support@americanaudio.com  
Fax: (323) 582-2941  
©American Audio® - www.americanaudio.us - vLP 2500 Power Amplifier user manual Page 4  
 
Front Panel  
1
2 3 4 5  
6
5 7 8 9  
10  
VLP2500  
PROFESSIONAL POWER AMPLIFIER  
6
6
10  
10  
3
3
15  
0  
15 POWER  
15  
10  
15  
PRO CLP  
POWER  
CLIP PRO  
1
1
30  
30  
80  
80  
0 dB  
0 dB  
CH A  
CH B  
VLP2500  
Figure 1  
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.  
1. Channel 1 gain Control - This rotary knob is used to control the out-  
put signal of channel one. Turning the knob in a clockwise direction will  
increase signal output.  
9. 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 protect any  
speakers connected to the channel.  
2. 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 protect any  
speakers connected to the channel.  
10. 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.  
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.  
4. Channel 1 signal Indicators - These green and yellow Led’s will glow  
according to the average signal output.  
5. Function Indicators - These indicators detail the operating mode of  
the amplifier. These Leds will also function as a power indicator.  
6. Power switch - This switch is used to control the units main power.  
7. Channel 2 signal Indicators - These green and yellow Led’s will glow  
according to the average signal output.  
8. Channel 2 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  
©American Audio® - www.americanaudio.us - vLP 2500 Power Amplifier user manual Page 5  
 
21  
22 23 24  
25  
26  
27  
28  
21  
rear Panel Control  
VLP2500  
36  
Figure 2  
35 34 33  
32  
31  
30  
29  
21. Cooling Fans - dual high speed cooling fans  
30. Channel 1 output Jack/5 way Binding Post - connect to your speaker’s  
input jack. red is positive signal and Black is negative signal.  
22. Channel 2 XLr Input - channel two 3-pin XLr balanced input jack. See  
page 9 for more details.  
31. Channel 1 speakon output - optional speaker output connections. use  
pins 1+ and 1- of this 4-pole Speakon connector to connect to your speaker’s  
Speakon input jack.  
23. Channel 2 trs Input - channel two 1/4” female jack. excepts either a bal-  
anced or unbalanced plug. See page 9 for more details.  
24. Mode switch - This switch controls the amplifier’s operating mode. The  
amplifier can operate in three different modes; mono Bridge, Stereo, or Parallel  
mono. The amplifier is shipped in stereo mode.  
32. Filter switch - This switch controls the amplifier’s filter mode. The amplifier  
can operate in three different filter modes; High Pass, Low Pass, and By-Pass.  
33. sensitivity switch - This switch lets you choose the input sensitivity.  
25. ground on/off switch - if hear a hum or any interference, put the Ground  
switch in the “on” postion .  
34. Channel 1 trs Input - channel one 1/4” female jack. excepts either a bal-  
anced or unbalanced plug. See page 9 for more details.  
26. Channel 2 speakon output - optional speaker output connections. use  
pins 1+ and 1- of this 4-pole Speakon connector to connect to your speaker’s  
Speakon input jack.  
35. Channel 1 XLr input - channel one 3-pin XLr balanced input jack. See  
page 9 for more details.  
36. Limiter switch - This switch is used to limit the input level. use this function  
to avoid damage to your speakers.  
27. Channel 2 output Jack/5 way Binding Post - connect to your speaker’s  
input jack. red is positive signal and Black is negative signal.  
28. Fuse holder - This housing stores 30 amp GmA protective fuse for the 120v  
version and 15 amp GmA fuse for the 230/245v version. never defeat the fuse,  
the fuse is designed to protect the electronics in the event of severe power  
uctuations. Always be sure to replace the fuse with an exact match as the  
one being replaced, unless otherwise told to do so by an authorized American  
Audio® service technician.  
29. aC Cord - Plug this cable into a standard wall outlet. check that the voltage  
in your area matches the amplifiers required voltage.  
©American Audio® - www.americanaudio.us - vLP 2500 Power Amplifier user manual Page 6