American Audio Amplifier XLT Series User Manual

							©American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 11
OPERATING MODES: Always configure  your amplifier operating mode before beginning operation. If you want to change it dur-
ing performance. You must decrease the gain controls to their lowest levels to protect the speakers from any popping noise.
Stereo Operation - Page 15/Figure  14 details  an  example  of  a  typical  stereo  set-up.  Connect  your  inputs  into  channels  one  and 
two of the amplifier. Connect your speakers to the outputs on the rear of the amplifier. Be sure that your front gain controls are turned 
down to their lowest level (full counter-clockwise). Turn your amp on.\
 Turn your input source level up. Use your front gain controls to 
regulate the output volume. Be sure not to raise the volume to the clip level, however an intermittent clip signal is acceptable.
Mono Bridge Operation - Page 15/Figure 15 details a mono bridge set-up. Be sure your amplifier and all other audio equipment 
is powered down. Flip the Stereo/Parallel/Bridge switch to the Bridge position. Connect an input signal to channel one. Connect your 
speaker across  the red output binding post on the rear of your amplifier. Turn your equipment on (your amplifier should always be the 
last item you turn on). Apply an input source signal to your amplifier. Turn channel two gain up. Use the channel one gain to regulate 
your amplifier output.
Bridged-Mono Mode Caution - The voltage across the output terminals of a bridged XLT Series amplifier may equal or exceed 
100 volts RMS and may be as high as 130 volts. Use fully insulated CLASS ONE wiring, and the load must be rated for up to 2500 watts 
(@4 ohms)
Parallel Mono - “Parallel ” ties the two channel line inputs together so that they\
 will both be driven by the same signal, without the 
need for external jumpers or wiring. Both amplifier channels will operate independently. Though they carry the same signal, their gain 
controls  affect  only  their  respective  channels,  and  they  both  must  use  their  respected  speaker  outputs.  Never  attempt  to  parallel  the 
speaker outputs, this may cause serious damage to your amplifier! This mode is recommended when using the XLT Series to run bass 
speakers, to achieve better low end. To run in parallel mono mode connect your system as you would if you were going to run in stereo 
mode. Then flip the mode switch to “MONO.” Be sure the amp is off or the power is disconnected before making any changes. 
						

							©American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 12
PROTECTION:
Thermal Protection -  If  the  amplifiers  operating  temperature  runs  over  105°C  (221°F)  the  amplifier  will  go  into  thermal  protection  to 
prevent damage from over heating. The Protect Indicator LED located on the front of the amp will light up, and the output signal will 
be muted. The fans will start to run at max speed to allow the amp to return to a safe operating temperature. To prevent amplifier over 
heating, make sure your input signal is not clipping (Red LED indicator located at the front), and that you are not overdriving the amp. 
Make  sure  not  block  the  airflow  input  and  output  vents  and  always  use  the  amp  in  an  enviroment  that  is  no  higher  than  30°C  (86°F). 
Never use a speaker load that exceeds power or impedance ratings.   
VHF Protection - If the amplifier detects a VHF signal or excessive feedback, the amplifier will enter VHF protection after 3 seconds. 
The Protection Indicator LED located on the front of the amp will glow and the output will be muted. After 10 seconds the VHF protec-
tion mode will be disabled. After the protection circuit starts up, if the signal is still present the amplifier will remain in VHF protection 
mode.   
Clip Limiter - When the input signal overloads, the “CLIP LED’s” will indicate a signal overload, at this time, the master volume should 
be lowered to reduce distortion. If the input gain level is not reduced the built-in limiter will activate. During signal overload, the lim-
iter will reduce the input audio signal enough to minimize the amount of clipping. A limiter takes the gain of an overloading signal and 
reduces it, the reduction in gain reduces distortion that can cause damage to your speakers and amplifier. During normal operation 
below clipping, and momentary clips on peaks, the limiter does not affect the audio signal and is inaudible. It will allow brief clipping of \
peaks  and  will  only  activate  when  continuous,  hard  clipping  occurs.  During  excessive  clipping  the  limiter  will  reduce  the  audio  signal 
enough to minimize the amount of clipping. When the input signal decreases enough that clipping ends, the limiter will deactivate and 
cease its gain reduction. The limiter has a fixed threshold and can not be adjusted. NOTE: If input signal is clipping or exceeds linear-
ity working range of input circuit, then the Clip Limiter will not work.
Short Circuit Protection - The XLT Series amplifiers all come with built-in Short Circuit Protection. If a short circuit is detected on 
the output signal, the Clip and Protect Indicator LEDs will both glow. This protection makes the output transistors work at a safe 
range and there will be no output from the amp. The amp will recover after 10 seconds after the terms of the short circuit have been 
removed.
AC Local Power Protection - If the AC power voltage is lower than the required voltage (160V), the power supply will turn off auto-
matically until the power voltage is normal. NOTE: The correct AC main voltage is listed above the Power Cord input. Connecting to 
the wrong voltage is dangerous and may damage the amplifier. Always be sure the source voltage for your areas matches the required 
voltage for your amplifier.
DC Protection - If the output signal has a larger DC voltage (=2.6V), in order to protect the speaker, the DC protection circuit will start-
up. When the DC protection circuit starts up, the Protection Indicator LED (1) will glow and the amp will go mute.
Input/Output Protection - The input circuits are isolated by 10k resistors. An ultrasonic network \
uncouples RF from the output and 
helps keep the amplifier stable with reactive loads.  
Safe Power Levels at Different Output Loads: 
						

							©American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 13
8-Ohm Loads:  The  amplifier  can  operate  at  practically  any  power  level  without  risk  of  overheating.  However,  if  it  is  pushed  hard 
enough to continually light the “CLIP” indicator, the amplifier’s average output power can reach 150 watts.
4-Ohm Loads: If the “CLIP” indicator flashes occasionally, the amplifier is approaching its maximum long-term power capacity. If it is 
lit about half the time, the amplifier channel will probably go into thermal protection within a few minutes.
AMPLIFIER FEATURES:
LINK - Link will allow the user to daisy-chain one amplifiers signal input int\
o another amplifier. Plug the signal source outputs into the 
first amplifier’s input, patch from the amplifier’s LINK jacks to the next amplifier’s input, and so on, daisy-chaining as many amplifiers 
as there is no excessive level loss.
OPERATING VOLTAGE (AC MAINS) - The correct AC main voltage is listed above the Power Cord input. Connecting to the wrong 
voltage is dangerous and may damage the amplifier.
GAIN CONTROLS - The gain controls are located on the front panel and are calibrated in 2dB of attenuation from full gain. It is best to 
adjust the amplifier so no “hissing” is heard from speakers with no music being played, this will ensure the lowest possible distortion 
during normal operation.
LED INDICATORS - Each channel has seven LEDS. The bottom LED is the channel power indicator. The next four LEDs indicate sig-
nal  level  activity;  3  green  LEDs  and  one  orange  LED.  One  red  LED  indicates  signal  clipping  and  the  other  red  LED  indicates  protec-
tions mode for shorts/ overload. 
						

							©American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 14
TYPICAL MONO BRIDGE SET-UP
SPEAKERS
8 OHM MINIMUM
TYPICAL STEREO OUTPUT CONNECTIONS
SPEAKERS
4 OHM MINIMUM
SPEAKERS
4 OHM MINIMUM
Use Channel 1 Inputs Only (XLR or 1/4” Jacks)
X
Use Speakon Connections
Use the two positive binding post 
termainals (red) for speaker output.
Figure 15
Figure 14
Set the Operation Mode switch to Bridge   
						

							©American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 15
TYPICAL PARALLEL SET-UP
SPEAKERS
4 OHM MINIMUM
SPEAKERS
4 OHM MINIMUM
Figure 15
Use Channel 1 Inputs Only (XLR or 1/4” Jacks)
Set the Operation Mode switch to Parallel  
						

							American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 16
The  XLT  Series  carries  a  one  year  limited  warranty.  We  recommend  you  fill  out  the  enclosed  warranty  card  to  validate  your  purchase.  All 
returned service items whether under warranty or not, must be freight pre-paid and accompany a R.A. (return authorization) number. If the 
mixer is under warranty, you must provide a proof of purchase invoice. You may obtain a R.A. number by contacting our customer support 
team on our toll free number. Please contact American Audio® customer support at (800) 322-6337 for a R.A. number. All package 
not displaying a R.A. number on the outside of the package will be returned to the shipper.
1-YEAR LIMITED WARRANTY
A.  American Audio® hereby warrants, to the original purchaser, American Audio® products to be free of manufacturing defects in material and work-
manship for a period of 1 Year (365 days) from the date of purchase. This warranty shall be valid only if the product is purchased within the United 
States of America, including possessions and territories. It is the owne\
r’s responsibility to establish the date and place of purchase by acceptable 
evidence, at the time service is sought. 
B.  For warranty service, send the product only to the American Audio® factory. All shipping charges must be pre-paid. If the requested repairs or 
service (including parts replacement) are within the terms of this warranty, American Audio® will pay return shipping charges only to a designated 
point within the United States. If the entire instrument is sent, it must be shipped in its original package. No accessories should be shipped with 
the product. If any accessories are shipped with the product, American Audio® shall have no liability whatsoever for loss of\
 or damage to any such 
accessories, nor for the safe return thereof.  
C.  This warranty is void if the serial number has been altered or removed; if the product is modified in any manner which American Audio® con-
cludes, after inspection, affects the reliability of the product; if the product has been repaired or serviced by anyone other than the American Audio® 
factory unless prior written authorization was issued to purchaser by American Audio®; if the product is damaged because not properly maintained 
as set forth in the instruction manual. 
D.  This is not a service contract, and this warranty does not include maintenance, cleaning or periodic check-up. During the period specified above, 
American Audio® will replace defective parts at its expense, and will absorb all expenses for warranty service and repair labor by reason of defects 
in material or workmanship. The sole responsibility of American Audio® under this warranty shall be limited\
 to the repair of the product, or replace-
ment thereof, including parts, at the sole discretion of American Audio®. All products covered by this warranty were manufactured after January 1, 
1990, and bear identifying marks to that effect. 
E.  American Audio® reserves the right to make changes in design and/or improvements upon its products without any obligation to include these 
changes in any products theretofore manufactured. 
F.  No warranty, whether expressed or implied, is given or made with respect to any accessory supplied with products described above. Except to 
the  extent  prohibited  by  applicable  law,  all  implied  warranties  made  by  American  Audio®  in  connection  with  this  product,  including  warranties  of 
merchantability or fitness, are limited in duration to the warranty period set forth above. And no warranties, whether expressed or implied, including 
warranties of merchantability or fitness, shall apply to this product after said period has expired. The consumer’s and or Dealer’s sole remedy shall 
be such repair or replacement as is expressly provided above; and under no circumstances shall American Audio® be liable for any loss or damage, 
direct or consequential, arising out of the use of, or inability to use, th\
is product.  
G.  This warranty is the only written warranty applicable to American Au\
dio® products and supersedes all prior warranties and written descriptions 
of warranty terms and conditions heretofore published.  
						

							XLT Series SPECS
Power supply: AC 100V, 50/60Hz (Japan)
      AC 110V, 60Hz (Colombia)
      AC 120V, 60Hz (U.S.A. and Canada)
      AC 127V, 60Hz (Mexico)
      AC 220V, 50Hz (Chile and Argentina)
      AC 220V, 60Hz (Philippines and Korea)
      AC 230V, 50Hz (Europe, New Zealand, South Africa, and Singapore)
      AC 240V, 50Hz (Australia and U.K.)
MODEL:                                            XLT 900 (Class AB)                                                  XLT 1200 (Class AB)                                                
Output Power:   200W RMS per Channel @ 8 Ohms, 1kHz, 1% THD     310W RMS per Channel @ 8 Ohms, 1kHz, 1% THD  
       300W RMS per Channel @ 4 Ohms, 1kHz, 1% THD    500W RMS per Channel @ 4 Ohms, 1kHz, 1% THD 
          450W RMS per Channel @ 2 Ohms, 1kHz, 1% THD    600W RMS per Channel @ 2 Ohms, 1kHz, 1% THD 
     (Bridge Mode, Mono)                  (Bridge Mode, Mono)                       
        600W RMS @ 8 Ohms, 1kHz, 1% THD       1000W RMS @ 8 Ohms, 1kHz, 1% THD                          
       900W RMS @ 4 Ohms, 1kHz, 1% THD       1200W RMS @ 4 Ohms, 1kHz, 1% THD                       
Total Harmonic          Less Then 0.1% (20Hz - 20kHZ @ 8 Ohms          Less Then 0.1% (20Hz - 20kHZ @ 8 Ohms   
Distortion (THD):                                                                          
Frequency                 (+/-01db, @rated output power, 8 Ohms): 20Hz - 20KHz         (+/-01db, @rated output power, 8 Ohms): 20H - 20KHz    
Response:                                 
Slew Rate:     20V Per µsec                     20V Per µsec         
Damping Factor @     100                         200            
8 Ohm:  
Dynamic Range:   More Then or Equal to 80dB          More Then or Equal to 80dB
S/N Ratio:     More Then or Equal to 85dB          More Then or Equal to 90dB
Impedance:               20K Ohms Balanced                  20K Ohms Balanced        
      10K Ohms Unbalanced                   10K Ohms Unbalanced      
Dimensions     19” x 13.3” x 3.5”                      19” x 15.5” x 3.5”       
(LxWxH):     482.6 x 338 x 89mm (4 Rack Mount Spaces)      482.6 x 394 x 89mm (4 Rack Mount Spaces)
Weight:     13lbs. / 6Kgs                     15lbs / 7Kgs           
American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 17 
						

							XLT Series SPECS
Power supply: AC 100V, 50/60Hz (Japan)
      AC 110V, 60Hz (Colombia)
      AC 120V, 60Hz (U.S.A. and Canada)
      AC 127V, 60Hz (Mexico)
      AC 220V, 50Hz (Chile and Argentina)
      AC 220V, 60Hz (Philippines and Korea)
      AC 230V, 50Hz (Europe, New Zealand, South Africa, and Singapore)
      AC 240V, 50Hz (Australia and U.K.)
MODEL:                                                 XLT 2000 (Class H)                                                   XLT 2500 (Class H)                                                
Output Power:   450W RMS per Channel @ 8 Ohms, 1kHz, 1% THD        600W RMS per Channel @ 8 Ohms, 1kHz, 1% THD  
       750W RMS per Channel @ 4 Ohms, 1kHz, 1% THD        1000W RMS per Channel @ 4 Ohms, 1kHz, 1% THD 
          1000W RMS per Channel @ 2 Ohms, 1kHz, 1% THD        1250W RMS per Channel @ 2 Ohms, 1kHz, 1% THD 
     (Bridge Mode, Mono)                (Bridge Mode, Mono)                       
        1500W RMS @ 8 Ohms, 1kHz, 1% THD          2000W RMS @ 8 Ohms, 1kHz, 1% THD                          
       2000W RMS @ 4 Ohms, 1kHz, 1% THD           2500W RMS @ 4 Ohms, 1kHz, 1% THD                       
Total Harmonic          Less Then 0.1% (20Hz - 20kHZ @ 8 Ohms          Less Then 0.1% (20Hz - 20kHZ @ 8 Ohms   
Distortion (THD):                                                                          
Frequency                 (+/-01db, @rated output power, 8 Ohms): 20Hz - 20KHz         (+/-01db, @rated output power, 8 Ohms): 20H - 20KHz    
Response:                                 
Slew Rate:     20V Per µsec                     20V Per µsec         
Damping Factor @     200                         200            
8 Ohm:  
Dynamic Range:   More Then or Equal to 80dB          More Then or Equal to 80dB
S/N Ratio:     More Then or Equal to 90dB          More Then or Equal to 90dB
Impedance:               20K Ohms Balanced                  20K Ohms Balanced        
      10K Ohms Unbalanced                   10K Ohms Unbalanced      
Dimensions     19” x 15.5” x 3.5”                      19” x 15.5” x 3.5”       
(LxWxH):     482.6 x 394 x 89mm (4 Rack Mount Spaces)      482.6 x 394 x 89mm (4 Rack Mount Spaces)
Weight:     20lbs. / 9Kgs                     20lbs / 9Kgs           
American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 18 
						

							American Audio®  -  www.americanaudio.us  -  XLT Series Power Amplifier User Manual  Page 19
Notes 
						

							©American Audio® World Headquarters:
6122 S. Eastern Ave. Los Angeles, CA 90040 USA
Tel: 323-582-3322  Fax: 323-725-6100
Web: www.AmericanAudio.us  E-mail: [email protected]
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