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					                            AMPLIFIER

                             AMPLIFIER


A device in which small amount of input power controls a larger
amount of output power. Used in sound to convert a small electrical
signal into a large electrical signal to drive the speaker.
                            AMPLIFIER

                          POWER OUTPUT


Power equates to the rate of energy transfer, or the rate of doing
work. Power is measured in Watts, and the watt has become a
common term in audio to describe the power handling capabilities of
amplifiers. Watts law defines power (P) as voltage (V) times current
(I) with following expression: P=V*I



                   AMPLIFIER LOAD IMPEDANCE

A major consideration when macthing amplifiers with speakers is the
resulting impedance presented to the amplifier when speakers are
connected to the output. The impedance of the load, determines how
much power the amplifier will produce.
                             AMPLIFIER

                   OUTPUT POWER VS IMPEDANCE


Amplifier output power (in Watts) will depend on the amplifier model.
And the exact delivered output power is depend on the speaker
impedance.


Below are the example of output power specification.


                    Output Power (Watts) – Stereo Mode Per Channel
Impedance (Ohms)        Crown CTs 3000           Camco Vortex 6
        16                    625                       730
        8                     1250                     1350
        4                     1500                     2300
        2                     1500                     3300
                           AMPLIFIER

                   OUTPUT POWER VS IMPEDANCE




                         Output Power (Watts) – Bridge Mode
Impedance (Ohms)       Crown CTs 3000         Camco Vortex 6
      16                   2500                    2700
       8                   3000                    4600
       4                   3000                    6600
       2                     -                       -
                            AMPLIFIER

                               MODE


Three configuration mode available for the stereo or dual channels
amplifier:


1.   Stereo Mode
2.   Parallel Mode
3.   Bridge
                            AMPLIFIER

                               MODE


                            Stereo Mode
Channel A and B operate independently, channel A input goes to the
channel B output jack, and the channel B input goes to the channel B
out jack.
                             AMPLIFIER

                               MODE


                            Parallel Mode
Channel A or B input signal goes to both channel A and B output jack.
Only one input must be connected to channel A or B input jack.
                            AMPLIFIER

                               MODE


                            Bridge Mode
Single input signal send to channel A and B input internally, and the
output from both channels are summed into one provides more power.
Only one input must be connected to input jack.
                          AMPLIFIER

                             MODE


    Output power comparison for dual channel and bridge mode.

                       Output Power (Watts) – Crown CTs 3000
Impedance (Ohms)     Stereo per channel           Bridge
       16                   625                    2500
       8                   1250                    3000
       4                   1500                    3000


                       Output Power (Watts) – Camco Vortex 6
Impedance (Ohms)     Stereo per channel           Bridge
       16                   730                    2700
       8                   1350                    4600
       4                   2350                    6600

				
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posted:2/9/2012
language:English
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