Circuit Wiring

7.1 Surround Sound Systems

7.1 channel audio systems is the modified version of 6.1 channel and plus provide additional realistic experience than 6.1 setup. at home this organization splits the single rear-hub amp into private not here- and moral-rear surround. These systems are not a stanch discrete 7.1 channel system to the same degree 7.1 formats don’t at this time exist. In a true discrete 6.1 surround method, the back center surround attitude is separate from the surround not here (SL) and surround right (SR) positions. A 7.1 channel system uses   matrixes extended surround wherever the not here-back and right-back (rear-inside surround) multichannel are blended at once and stored. The assembly of a 7.1 setup is agreed voguish the Picture under.

If you maintain a line with the purpose of loves movies and melody the top gift you can undertake physically is a instant household drama for the little ones. really, how many period has the Sunday game interfered with otherwise been interrupted to the little individuals needs to watch Disneys most up-to-date and supreme flick? I know these meltdowns occur far too frequently hip my household. This is why a minute home acting is an exceptional clue. Your children find out of the essence training and you persuade to watch television on occasion devoid of tantrums and meltdowns.

nearby are many payback to you in support of building a secondary home drama classification not the slightest of which is emergency parts be supposed to everything interminably turn out to yours. I know taking part in our abode I was concerned so as to I would in no way check the kids on one occasion we built a system in favor of them but the sincerity is they each one include altered tastes since well and now and again favor come again? we are watching above what brother and/before sister are watching. We moreover have the information with the aim of our television is still better than theirs and in attendance is continuously that to take out them back into the land-living of the living somewhat than holing up fashionable their basement show business disappear away. 

Getting back to the reimbursement, the kids are learning to take turns even establishing a schedule and sticking to it. They are learning to concoct to blame choices and even to drudgery concurrently on occasion and compromise in help of watching all of favorite programs to facilitate are close to finale but not quite completed. Its big to envisage them cooperating slightly than fighting all the stage. It too allows them a place to take their acquaintances once they occur above with the intention of they are reliable instead of cleaning up and keeps the fix away from home of our internal show business break (my not public favorite infer for having two home theaters).

For even other profit after it comes to a be with home show business within your home is to facilitate your children gain knowledge of very quickly come again? it agency to break something such such as the components in their home show business and arent likely to work out so again. It teaches trustworthiness on a level to facilitate nearly all toys that are lost and smashed lone week in the same way as Christmas may well not at all contract across. They understand to take attention of the equipment, to wipe inedible the fingerprints, not to perplex things by the side of it, and not to lug it inedible the shelves and leave it on the floor for example they see to with their other toys. This is something to matters to them and I tolerate been amazed next to how well they have taken care of it.

in the end, a mother country the stage organism is an grand tool meant for branch of learning. The menace of not allowing one individual before all of them not to watch their home the stage with surround sound or else any other television dressed in the household for with the aim of substance is a destiny worse than death on behalf of them on the whole of the stretch and adequate to make them to tread on the straight and narrow. The little era this privilege has been revoked bear been quite efficient in creating a much extra co-op feel of harmony next to home otherwise at train.

While nearby are many who believe with the intention of a local the stage before surround sound method representing the kids is heavy-handedness I tightly believe with the purpose of it is an incredible privilege and task that prepares them to deal with the planet outside having the status of they grow adult. They are already learning almost negotiation, cooperation, and respect.

Have you been use the IC above? if those who have not, IC above is used or applied to the audio power amplifier. IC processing is quite good for use on amplifier home, or room. IC used is SI1020G who have not very high output with only 20W 8 ohm impedance speakers. Supply voltage ranging from 12 volt to 23 volts.

Below schematic audio amplifier with IC SI1020G

Part List

R1 = 100K

R2 = 1R

C1 = 2u2F

C2 = 100uF
C3 = 47uF

C4 = 10uF
C5 = 2200uF
C6 = 47uF

C7 = 100uF 

Actually, 5.1 channel amplifier consists of 6 amplifiers 1 channel mono, which has certain specifications on each canals. Has 6 channel surround sound amplifier that consists of Front Left | Center | Front Right | Rear Left (Left Surround) | Rear Right (Right Surround) | and LFE (Subwoofer).


For clarity I give a simple illustration of the layout and the circuit for these speakers.

5.1 Speaker Setup

Accoustic Field Generator

Acoustic Field Generator is generating acoustic sound with surround effects are adjustable with a standard Dolby Surround, able to produce surround sound is good enough but not too much need of funds. Technological developments as if not only focused on one area alone but on all fronts. The development of technologies that exist today one of them is in the field of audio. With more advanced audio technology today not only as mere entertainment but has become a hobby, hobby is not cheap of course. Many audio enthusiasts trying to make music sound that sounded to be very hard to make music sound as live, the addition of the amplifier, woofer or special speakers that cost is not cheap.

The sound effects are living seems to now is something that most do not have to exist in every good audio devices. This effect is basically a surround effect that can lead to sound as though coming from different directions and his voice can still be heard clearly. Currently Compo-tape tape that has been a lot of these facilities surround sound but not good enough when heard from a considerable distance because of the effects surroundnya missing. This is because the distance is too far listener and speaker, speaker layout is not quite right, or the effect of unfavorable surround.

Surround effects are nice and can be heard with a good surround system is a system that is in movie theaters and to make it not a bit prangkat needed funds. However, if satisfaction remains the number one then the fund is not a major problem. To find a middle ground between price and quality surround effects it was attempted to make the Acoustic Field Generator that can produce surround sound is good enough but not too much need of funds. Acoustic Field Generator is capable of generating acoustic sound with surround effects are adjustable with a standard Dolby Surround.

Accoustic Field Generator Construction


Basically an Acoustic Field Generator built from op-amp circuit and filters. Op-amps are usually used as a voltage amplifier in the Acoustic Field Generator is more widely used as active filters. The filter in the tool is very instrumental in creating an acoustic sound that is really clear, but in practice, almost all the filters, do not miss the precision of the signal with a specific frequency. An op-amp is good for this application is the op-amp which has a wide bandwidth, rise time, slew rate and fast setting timenya. In addition to op-amp and active filter, theres more important parts of the power supply. This is the part that is instrumental in creating excellence acoustic sound because of the bad power supply which is the only producer of noise, which will enter into a voice signal path so that should clear acoustic sound into an acoustic sound with the addition of reverberation (noise). The power supply used is the twin power supply + / - 18 volts DC. Part Acoustic Field Generators

Before we start doing this project, it helps us know in advance about the function of each speaker.

Front Channel

Channel Front is a forward channel input signal LR. LR signal is passed to an amplifier with gain = 1 so that this signal is passed without change / to filter the input signal LR. Front Left and Front Right, is a public speaker that we encountered in stereo amplifier, consisting of a woofer and tweeter. Woofers generally produce low tone sound with a frequency range ranging from 80Hz - 250Hz, while the tweeter produces a high tone with a frequency range between 15kHz - 20kHz. For projects that we will create, its good we use a good quality woofer, with a size of 10 inches and a type piezoelectric tweeter for each speaker fronts.

In this section is the core of this hard perangakat. These sections produce surround effects. To produce the surround effect is required special IC MN3005 / 8 and MN3101. Both these ICs will delay the incoming signal in several phases, so that the signal output from this phase will be left with a signal phase of the signal lain.Pada this section L and R are deducted (LR) and then passed in the buffer, filter LPF, delay line, filter LPF (7KHz) and the last is a splitter between the signals R and L. Circuit which causes the surround effect is 75KHz LPF circuit that produces its output fed to the Right Rear 75KHz LPF amplifier input while it diparalel with the Left Rear amplifier input so as to produce two signals L and R which is basically a LR signal a phase lag with the original signal phase.

Rear Left and Rear Right, also known as surround speakers. This speaker is generally a semi-midrange speaker (usually used on television or Mini Compo), commonly called satellite speakers. In a movie surround speakers are used to generate the audible sound of distant voices or sounds that move from the back of our approach. In a music surround speakers produce sound backing vocals and generally sounds like guitars, violins and trumpets sounded clear here.

When it comes to your surround sound or home theater system, the quality of your speakers can really make or break the overall experience. Good quality speakers are one of, if not, the most important components when it comes to your home theater and surround sound system. 

You need to take action from the very beginning in order to make sure that you are not getting substandard speakers for your entertainment system whether your surround sound system is going to be used for your television viewing, home theater, music enjoyment, or to enhance your gaming experience on your personal computer the quality of the speakers will have a huge impact on how much you enjoy your system.

The problem is that most people do not even know where to begin when it comes to selecting and purchasing speakers. There are a few guidelines you can follow when making your decisions about speakers that will help you make better buying decisions in order to get higher quality speakers (budget allowing of course, though I recommend putting off the purchase until you can save up enough rather than purchasing inferior quality because it is within your price range).

There are many different types of speaker systems. Speakers that have received THX certification are generally your top of the line speakers. They will have very little distortion and a nice clear sound. If you can get your hands on a set of these and they fit within your budget constraints I highly recommend going with speakers that are THX certified. The sound, however should be the ultimate deciding factor when selecting speakers and quite frankly you will have to hear the sound for yourself in order to decide which sound you prefer.

Speakers, like anything are always a matter of preference. You can hear many different speakers and some people find that they all sound alike while others feel that the amount of distortion in some is simply unbearable and still others simply blame poor quality music on the sounds they hear in the speakers. The fact is that there are different determinations for quality and everyone has their own preferences and things that are important to them when listening to music and things that they feel can be sacrificed. I happen to be a bit of a sound snob so sacrifice isnt a word I like to hear when it comes to sound quality.

There are some things you can do in order to insure that you are getting a good quality set of speakers for your surround sound system. First, you should listen and make sure that the high sounds do not seem distorted or as though they were being made inside a tin can. You should also check that the midrange sounds are clear and resonant. You should also make sure that the speakers are not trying to do the job of the subwoofer, it is there for a reason and has a job-other speakers in the set shouldnt be trying to do it (if they are, it typically indicates problems with the subwoofer). Blend is important in a set of speakers. You do not want one speaker overpowering the others. If the music sounds too shrill or the middle range notes are overpowering, this is probably not the system for your needs.

It is recommended that you try the sound systems you are considering with different types of music and mediums (particularly if you will be using your surround sound system for a home theater or gaming system in addition to music). I always recommend the first 10 minutes of the movie Top Gun to check out sound when it comes to home theaters. You should also bring a copy of your favorite CD (as that is what you will probably listen to most on your system) and perhaps a few other CDs that show a variety. Listen to how different sounds are made on the system and choose according to the best overall system in order to have the most adaptability within your surround sound system.