single stereo surround with stereo amplifiers

[jeo]

if you don't have 5.1 decoders,
just follow the pictures to connect 4 or 5 speakers in stereo amplifiers
to get single(but very cool) stereo surround simulation,
using all types of audio souces,no matter if they are stereo,surround or 5.1 .

using 4 speakers:

red lines: (+) positives of all speakers and amplifier(L & R)
green line: (-) negatives of the surround speakers
black line: (-) negatives of the front speakers and amplifier(L & R)


using 5 speakers:

red lines: (+) positives of all speakers and amplifier(L & R)
green line: (-) negatives of the surround speakers
blue line (-) negatives of all the front speakers
black line: (+) positive of the central speaker
*you can change the polarity only of the central speaker(is irrelevant in the effect)

impedance: no less(never)than 8 ohms for the surround speakers,
for the frontal speakers 4 ohms or more.

i think that you'll understand what effect it can give looking the pictures.
if have any doubt feel free for ask!
don't do with doubts,because you can damage your amplifier and this is not the idea.


best regards (and better sound)!

[TNT]

Cute, where did you get this from? It reminds me of a type of recording they used to have where you were supposed to have a configuration like this. I forget what it was called.

FRONT
____________
|..................|
|..L...........R..|
|..................|
|........X .......|
|..................|
|..R...........L..|
|___________|

[jeo]

i had a long time ago (~september,1974) some magazines called "stereo review".someone wrote articles about speakers configurations and this is all that i remeber now.i use it a long time and is very cool.(i was eletronic technician and had tested all configurations from that article)

round 2 years ago,in another forum that i was member,i posted something like this and with a big link where have lots more of differents configurations,but i forgot where is this complete post and don't remember the links.

FRONT
____________
|..................|
|..L...........R..|
|..................|
|........X .......|
|..................|
|..R...........L..|
|___________|

i'm not right now about the name(matrix??) and details but i will find something to read about it.

regards

[atifsh]

its nothin but series and parallel connections, which will give u not surround but same sound frm all speakers , few years back few manufactures give it name "4 channel stereo" yamaha i guess one of those.
back in 70's its called psuedo sound , or quadro stereo sound.

old amplifies came with multi speakers output four channel or some exp ones with six channels. they gave same sound that ur gettin with a single stereo channel amplifier.

but remember ur amplifier should be a high current and should support 4 ohms othrwise ull damage in long run. rememeber no amplifier runs at 8 ohms straight, they jump up and down.

[atifsh]

and for those who thinks ull get 5.1 sound frm this think again... for example, if a car passes by ull hear same sound frm all speakers .. that is car coming and going. but with decoder, or DD amp ull hear car coming frm one speaker and going frm other. thats cause all chanells are seperate.

[jeo]

atifsh,
only clarifications(not a discussion)

and for those who thinks ull get 5.1 sound frm this think again

the idea is for simulation(like in the title) and for who don't have 5.1 decoder,not for any 5.1 substitute.

ull hear same sound frm all speakers

wrong(i'm sorry)

but remember ur amplifier should be a high current and should support 4 ohms

it's a dangerous mistake,using 4 ohms you will damage,read that i wrote:

no less(never)than 8 ohms for the surround speakers

why i wrote "never less than 8 ohms for the surround speakers" ?

its nothin but series and parallel connections

right!

which will give u not surround but same sound frm all speakers ..

wrong!(i'm sorry again)

nothing is better that "ilustrations",think is this example using the picture for 5 speakers listening this single stereo source:

guitar on the left channel(only)
drums on the right channel(only)
voice in left and right

now i ask you(if you don't mind):
what you'll listen in each speaker?

[atifsh]

dont have to sorry me ... and for what ?

never ment to contradict ur post, just added few thoughts...

[atifsh]

ok when i say ull hear same frm all speakers is ...... [4 channel]

ull hear same sound frm other set of 2 speakers. no matter on which set ur back is ull hear same sound frm back and front

[atifsh]

atifsh,
it's a dangerous mistake,using 4 ohms you will damage,read that i wrote:why i wrote "never less than 8 ohms for the surround speakers" ?

i never wanted to say use 4 ohm amp, but it should support 4 ohms aswell.

no using 4 ohm amp wont be dangerous u just have to reconfigure ur speakers and connectyions to make them not go below 4.

[4 ohm for 8 ohm amp = bad]
[8 ohm for 4 ohm amp = not bad but ull get half power]

[atifsh]

atifsh,

nothing is better that "ilustrations",think is this example using the picture for 5 speakers listening this single stereo source:

guitar on the left channel(only)
drums on the right channel(only)
voice in left and right

now i ask you(if you don't mind):
what you'll listen in each speaker?

ull hear 2 left channels, 2 right channels and one channel which gets all 2 [4 if u like] channel sounds.

i / we never get annoyed or there nothin to mind here at this forum.

[jeo]

somehting is wrong(i'm sorry again)
let me expalin:
central speaker = everything(mono)
left speaker = guitar
right speaker = drums

ull hear same sound frm other set of 2 speakers. no matter on which set ur back is ull hear same sound frm back and front

wrong(sorry)
surround speakers = guitar and drums but no voice

clarifications: the surround speakers never will show what is common from the right and left (the voice in my ilustrations) but you will listen great reverberation (if any) because studios always use some reverber.

resume: the surround speakers only show the differences between channels(differencial extractions) and for this reason:

but it should support 4 ohms aswell.

right,but you forgot important detail:
when you have sound form only one channel,see how the imedance is used,for example the guitar from left channel playing alone(no drums or voice)in any moment:
each surround speaker have to have 8 ohms(min) because when left channel play alone,the positive of the right channel have zero(nothing) and in this moment is the ground of the left channel with impedance = 16 ohms.
in this same moment, the left front and the central have = 16 ohms(if using 8 ohms for each)
the general impedance for the left channel of the amplifier is now:
16(surround) / 16(front left+central) = 8 ohms
thing now,what will be the impedance if you have all speakers with 4 ohms?
of course,will be 4 ohms toofor one channel alone but (very important)
what will be the impedance when all channels are working together?
another resume: if each surround speaker have 4 ohms,will damage the amplifier because each surround speaker have now only 2 ohms!(the union(central point-green line) of the surround speakers divide the impedance.
for this reason i advice in the first post:

impedance: no less(never)than 8 ohms for the surround speakers,
for the frontal speakers 4 ohms or more.

right or wrong?

[atifsh]

i know ohms thats why i said u have to reconfigure and or need to add speakers, with right configuration ull never get below 4 but yes if u dont have more speakers then yes using all 4 ohms will get u in trouble....


bout rest of it , cause i have to listen to it for better part.

because what i cant understand how a simple stereo amp and no kind of decoding can do that when what ur doing is just spliting 2 channels in to more speakers, im sorry it just dont get into my head, that how simple wiring can seperate channels.

but i believe if u say so....

[jeo]

but i believe if u say so....

not only in me but in who wrote the article inside old magazine(stero review)

because what i cant understand how a simple stereo amp and no kind of decoding can do that..

if you have 4 or 5 speakers,test(listen) and tell us,i trust that you will like.

dont have to sorry me ... and for what ?

sometimes my poor english give me big problems when someone don't have open mind like you have my friend!


best regards

[atifsh]

thats a big ask have to find a long weekend for finding my old spkrs and amp and plugin . hmm have to wait for a day when family not in the house
hahaha
not to mensiopn have to find wires too

[atifsh]

sometimes my poor english give me big problems

best regards

i found its the medium ur having conversation, i found chating or mailing the worst cause u never see the face and never knew the expression, i have been in trouble few times when i thought some one is joking when he wasnt and others will think im being rude when im not