Making A Hi-end Home Theater System At Home

While a home theaters system demands elaborate sound processing circuitry, it doesn’t make the construction by any means difficult, thanks to the present day Hi-Tech chips which today enable us to make almost any electronic circuit very quickly without far troubles.
One such IC can be seen in the FIRST FIGURE (bottom of the page), which single handedly carries out the complete sound refinement functionality, such that the reproduced tunes is effectively conditioned for supplying the individual with the essential surround sound effects.
Even so the above IC is only capable to process the tone and generate the required qualities to

the reception, nevertheless the modelled output is substantially too faint and cannot be intended for driving the various speakers and subwoofers.
Quite simply the highly refined end results from the above IC ought to be appropriately boosted before it could be heard by way of the respective speakers.
No hassle, just as before we now have custom made ICs for controlling this challenge to, signifying there’s an outstanding IC which is actually able to create a mind blowing 4 by 50 watts from a single small packet.
The SECOND FIGURE below illustrates the finalized details of the circuit. We can check one particular square block at the middle in addition to a handful of other symbols around it associated with the square block.
The square block is the IC as well as the figures shown at its borders are its pin outs. On the left hand side of the IC we can view, a few figures by means of parallel bars, these include the capacitors in addition to the specific pin outs from the IC are its inputs.
We can watch 4 inputs, that is IN1, IN2, IN3 and IN4 that happen to be the 4 inputs from the signal processor IC outputs which have to be plugged into these inputs of the amplifier.
The right hand side of the IC encompasses the amplified outputs. They are generated as OUT1, OUT2, OUT3and OUT4, every one of these correspond the fed inputs respectively. The front L/R and the rear L?R has to be correctly joined with these outputs.
Concerning the designations of the inputs, the above outputs must be linked to

the front and the rear end surround sound loudspeakers.
Every output can quickly create a good fifty watts of power, as a result the connected speakers has to be accordingly rated, in fact those must be rated at around 75 watt RMS and 100 watt peak for receiving optimal benefits.
On the left hand side of the IC, we are able to observe two more inputs assigned as ST-BY and MUTE, the ST-By input is the stand by input which may be set off so that you can stop the device momentarily.
The MUTE input can be utilised for muting the output whenever required.
All the above choices could possibly be simply soldered over a general purpose PCB and integrated with each other employing joining wires.
The above constructed board will want DC power for working, you could possibly procure a readymade SMPSAC to DC power supply for running the circuit or may well simply further fit together a transformer, bridge, capacitor network so as the relevant boards could be powered via it.
The available discourse is without one fundamental improvement, it’s the subwoofer amplifier circuit. Because a subwoofer generally required pretty high power for driving the low frequencies, we have to put up an additional amplifier board for this. This concept was separately talked about in this posting. You possibly can make it as well as put in the construction with the above circuit. Supply the input of this 2 hundred watt amplifier from the audio processor related output. The output of the amplifier should be down the road tied to an appropriate two hundred and fifty watt subwoofer loudspeaker.
Once all the PCB soldering/assembling tasks are concluded, it’s only about covering the full system in stylish plastic body with the pertinent outputs terminated over the extraneous covering of the system for permitting trouble-free integration with the additional loudspeakers. 



Article Written By Swagatam

Swagatam is a blogger at

Posted on: Last updated: 25-07-2016 89 0

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