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OPERATION IN BRIDGED MODE 

 

In this mode, the channel 1 input signal will be output from the bridge output connectors. (The 2 binding posts) In this 
case, use the channel 1 volume control to adjust the volume, keep the volume control of channel 2 turned 
completely down (counter clockwise). Bridged mode is intended for driving loads with a total impedance of 8 ohms or 
greater.  
 
In Bridge Mode you will combine the power of both channels into one speaker. You will have a large amount of power 
available so carefully check the power handling of your speaker before operation. 

 

BRIDGED

+

-

PUSH

PUSH

 

 
 
 

RACKMOUNTING TIPS 

 

 

It is a good idea to mount this in the bottom of a rack frame. Supporting the back of the unit may be 
necessary for portable or road use. The APX1500 mounts into a standard 19u rackmount.  

 

ALTO amplifiers are well shielded; however, mounting low-level electronics some distance away from power 
amplifiers is common practice to reduce the possibility of electromagnetic interference into the low level 
units, which may sometimes be unusually susceptible to picking up such interference.  

 

When wiring a rack, it is good installation practice to route all AC wiring along one side of the rack and all 
audio wiring along the other side to avoid coupling AC-borne interference into the audio.  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Содержание APX1500

Страница 1: ...APX1500 QUICKSTART GUIDE ENGLISH ...

Страница 2: ...ll faders and gain knobs are set to zero 6 Connect all sound sources outputs to amplifier inputs as indicated in the diagram 7 Connect the amplifier outputs to speakers 8 Plug all devices into an appropriate power source 9 Switch everything on in the following order Sound sources i e microphones turntables CD players etc Mixer Amplifier Speakers 10 When turning powering down turn everything off in...

Страница 3: ...signal will be output from the CH 2 output connector Parallel Mono Mode In this mode CH 1 input signal will be output from the output connectors of both channels Bridged Mode In this mode CH 1 input signal will be output from the bridge mono output connector 5 CHANNEL OUTPUTS Connect your speakers input jacks to these outputs For the binding posts red is the positive signal and black is the negati...

Страница 4: ...ue to operate normally During short circuit protection the Clip and Protect LEDs will light simultaneously and all output from that channel will stop Short Circuit Protection can often be traced back to the signal output line i e the speaker line Check the line from the output terminal of the amplifier to the speaker If this line is still good check the internal speaker connections and components ...

Страница 5: ...d the channel 2 input signal will be output from the channel 2 output connectors STEREO PUSH PUSH OPERATION IN PARALLEL MODE In this mode the channel 1 input signal will be output from the output connectors of both channels The channel 2 input jack is not used the channel 1 and 2 volumes can be adjusted independently Use the Parallel Mode when you want to drive two speakers with only one input sig...

Страница 6: ...r speaker before operation BRIDGED PUSH PUSH RACKMOUNTING TIPS It is a good idea to mount this in the bottom of a rack frame Supporting the back of the unit may be necessary for portable or road use The APX1500 mounts into a standard 19u rackmount ALTO amplifiers are well shielded however mounting low level electronics some distance away from power amplifiers is common practice to reduce the possi...

Страница 7: ...0 3 dB VOLTAGE GAIN 32 dB DISTORTION SMPTE 1M 0 5 S N ratio 110 dB Inrush Current at initial switch on 8 24A Inrush Current after power supply interruption 9 30A GENERAL SPECIFICATIONS PROTECTIONS ON OFF muting DC fault load grounding relay Internal fault fuses CONTROLS Front AC switch CONTROLS Rear Low pass filter mode selector SIGNAL INDICATORS 2 green LED CLIP 2 red LED POWER INDICATORS 1 Blue ...

Страница 8: ...www altoprofessional com MANUAL VERSION 1 2 ...

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