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©American Audio®  -  www.americanaudio.com  -  vX Series™ power Amplifier user manual  page 12

Mono Subwoofer - 

This operation is similar to the Stereo Subwoofer operation but in mono. When running subwoofers it is usually 

recommended to run them in mono mode to achieve a cleaner tighter low end. This operation allows you to run several subwoofers 

down to a minimum of 4 ohms. To avoid amplifier  overheating, never run the amplifier  below 8 ohms in this mode. Set up this mode 

as you would a standard stereo set up. in this mode you may use the frequency adjustment on the rear of the amp, to control the bass 

frequency output level. Frequencies may be adjusted from 20Hz to 200Hz.

proteCtIon:

Limiter -

 only the vLp 

1500 and 600 come with a built in limiter. When the input signal overloads, the “CLIP LED’s” indicate a sig

-

nal 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 limiter 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. 

Safe Power Levels at different output Loads:

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.

Short Circuit Protection -

 

The vX Series

 amplifiers all come with built-in output Short circuit protects. The output Short circuit 

protection protects the output devices of the amplifier from short circuits and stressful loads. if your speaker lines short, the ampli-
fier automatically detects this problem and discontinues operation for that channel. if one side of your amplifier becomes shorted and 
goes into protect mode, the other side will continue to operate normally. during short circuit protection, the "clip" Led and “protect" 
Led will light simultaneously indicating amplifier fault. All channel output  during the “Short circuit protection" will be interrupted (i.e. 
no sound out

Summary of Contents for VX

Page 1: ...User Instructions American Audio 6122 S Eastern Ave Los Angeles Ca 90040 6 09 Professional Power Amplifiers VX Series ...

Page 2: ...upplémentaries situés dans le guide Este símbolo tiene el propósito de alertar al usuario de la presencia de voltaje peligroso que no tiene aislamiento dentro de la caja del producto que puede tener una magnitud suficiente como para constituir riesgo de corrientazo Este símbolo tiene el propósito de alertar al usuario de la presencia de instrucciones importantes sobre la operación y mantenimiento ...

Page 3: ...e 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 POUR ASSURER L A FIABILE TE E T OBTENIT UNE PERFORMANCE OPTIMALE NESOUMETTE JAMAIS L AMPLIFICATEUR A UNE CHARGE D IMPEDANCE TOTALE INFERIEURE A 2 OHMS NI AVEC UN H P NI EN COMBINAISON DES H P AVEC UN H P IL F...

Page 4: ...ngratulations and thank you for purchasing this American Audio VX Series amplifier This amplifier is a representation 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 information concerning the proper ...

Page 5: ...ED may glow when the unit has been turned off this is normal 6 Channel B Gain Control This rotary knob is used to control the output signal of channel B Turning the knob in a clockwise direction will increase signal output 7 Enter Button This button will allow you to access the different set tings located in the menu Push this button to set your desired setting 8 Down Button This button allows you...

Page 6: ... for the VX 1500 Never defeat the fuse the fuse is designed to protect the electronics in the event of severe power fluctuations 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 Au dio service technician 28 Channel 1 Output Jack 5 way Binding Post Connect to your speaker s input jack Red is positive signal and...

Page 7: ...cs in the event of severe power fluctuations Always be sure to replace the fuse with an exact match as the one being replaced unless otherwise told to do so by an autho rized American Audio service technician 39 AC Cord Plug this cable into a standard wall outlet Check that the voltage in your area matches the amplifiers required voltage 40 Channel B Output Jack 5 way Binding Post Connect to your ...

Page 8: ...g 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 Figure 5 Set Up INPUT The VX Series amplifiers have one XLR jack for balanced input per channel Use this connection to connect the output signal from a mixer cross over or EQ to your VX Series amplifier A balanced connectio...

Page 9: ...e their speaker cables with spade lugs or bare wire ends This is not advantageous to most users that want to reconfigure their systems or quickly change out an amp The Neutrik Speakon connector provides the most convenient solution to this problem eliminating the need for spade plugs or bare wire end cables Major speaker manufacturers have been using Speakon connectors on their products for years ...

Page 10: ...or housing A making sure that the large notch on the outer edge of the insert lines up with the large groove on the inside of the connector housing The insert should slide easily through the housing and out the other side until it extends approximately 3 4 inch from the end of the housing 6 Slide the cable tension clip D along the cable and insert into the housing A making sure that the large notc...

Page 11: ...ure that your front gain controls are turned down to their lowest level full counter clock wise 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 14 Figure 14 details a mono bridge set up Be sure your amplifier and ...

Page 12: ...ill 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 Safe Power Levels at Dif...

Page 13: ... 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 AMPLIFIER FEATURES THRU Thru will allow the user to daisy chain one amplifiers signal input into another amplifier Plug the signal s...

Page 14: ...ays NEW PASS Wd 0 1 2 3 4 5 6 7 8 9 3 Next press the UP or DOWN buttons to move the cursor right or left to your desired number Press ENTER to select your desired number 4 Your password must be 5 numbers long The new password will be saved by the amp automatically and the LCD will return back to the regular screen displaying the working mode and temperature HOW TO CHANGE PASSWORD STATUS 1 Choose y...

Page 15: ...5 TYPICAL Mono bridge SET UP SPEAKERS 8 OHM MINIMUM Typical Stereo Output Connections SPEAKERS 4 OHM MINIMUM SPEAKERS 4 OHM MINIMUM Use Channel 1 Input Only XLR Jack X Use Speakon or Banana Jacks Use the two positive binding post termainals red for speaker output Figure 14 Figure 13 ...

Page 16: ... 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 m...

Page 17: ...er channel 8 Ohms 750W RMS per channel 8 Ohms 1kHz 1 THD 1kHz 1 THD 1kHz 1 THD Total Harmonic Less Than 0 1 20Hz 20kHZ Less Than 0 5 20Hz 20kHZ Less Than 0 5 20Hz 20kHZ Distortion THD 8 Ohms 8 Ohms 8 Ohms Frequency 0 3db rated output power 0 3db rated output power 0 3db rated output power Response 1W RMS 8 Ohms 20Hz 20KHz 1W RMS 8 Ohms 20Hz 20KHz 1W RMS 8 Ohms 20Hz 20KHz Slew Rate 15V Per usec 15V...

Page 18: ...ican Audio is part of the American DJ Group of Companies American DJ World Headquarters 6122 S Eastern Ave Los Angeles CA 90040 USA Tel 323 582 2650 Fax 323 582 2610 web www americanaudio com e mail info americanaudio com ...

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