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Old 12th October 2008, 10:38 AM   #1
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Default Perfect sound search, this idea, HELP!, the long and insane search...


I was informed by Rabbitz, the one sent me Yamaha brochure from model 2000.

So... as you can see, idea is not mine... i have just tried something using very simple circuits.

And there they told me nice things.

They told are avoiding crossover, using new kind of circuit... two amplifiers NOT operating in push pull mode.... operating push push or pull pull mode...all transistors the same... NO PNP together NPN...or all PNP or all NPN.... no crossover and class A operation.

Those two amplifiers are combined into a single channel, alike a bridge i think... load goes into the midway... the middle... receiving both output signals that will be out of phase one compared to the other.... complementary phase will be there combined... will be there into the output load, the speaker.

I felt the idea GREAT!... and i have tried.... sounded PERFECT!....but efficiency was very low (2.5 percent to single ended half cicles units..direct coupled, class A, now swithing circuits)

Into the input i have used a single transistor to invert....one channels captured into coletor and other into emitter...all folks class A...............2.5 watts to 100 watts of consumption...AWFULL!

HELP!.... have any idea to make this thing better?.... can you do some?.... have a good idea?.... can you contribute with me, with yourself, with forum and with mankind?.... let's do something better?.... together?

But DO THINGS too!... do not come only to produce brainstorm and produce ideas TO ME TO BUILD.... do some too.... also ideas will be nice..but i do not ensure i will try all ideas, unless they were tested real life.... there are a lot of crazy "simulator" folks down there to produce zilions of things that may sound good, bad , awfull or even not sound..as simulators are nice too but guarantees nothing.

regards,

Carlos
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Old 12th October 2008, 10:42 AM   #2
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Default Up and down you see two amplifiers, direct coupled


of course DC amplifiers...all folks hot, class A monster.

The upper one receive one phase and the other receive the complementary phase... the down left stage inverts... gain one class A stage (colector and emitter resistances have same value).

Into the output, the upper amplifier is combined with the lower channel into the load...the off set there is small..the amplifiers are almost the same...so... the colector voltage into the upper one is 17 volts... and the colector voltage into the lower one is also 17 volts... difference is 40 milivolts or less...so... we can combine both into a single resistance or speaker, as will not flow DC.

But AC will flow!... clear...perfect sound..superior.

But terrible!...awfull!...ridiculous in efficiency.

Wanna help?... wanna do it by yourself?... wanna have fun?

regards,

Carlos
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Old 12th October 2008, 11:10 AM   #3
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Default Here is the amplifier image.


Not only the technology inside is interesting, but also the amplifier looks beautifull to my eyes.

regards,

Carlos
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Old 12th October 2008, 11:13 AM   #4
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Default This is the model number


Yes... i have the brochure...if you cannot download it... write to me and i will be happy to upload to you.

panzertoo@yahoo.com

regards,

Carlos
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Old 12th October 2008, 11:16 AM   #5
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Default Here is internal image....... really pretty.


regards,

Carlos
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Old 12th October 2008, 11:23 AM   #6
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Default A graphic idea how the circuit works


Ground is not used... avoided when possible.

regards,

Carlos
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Old 12th October 2008, 11:32 AM   #7
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Old 12th October 2008, 01:22 PM   #8
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Default Thank you Zen.


regards,

Carlos
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Old 12th October 2008, 03:03 PM   #9
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Default hohohohohohoh!


Yeeeesssss!

Carlos
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Old 12th October 2008, 03:22 PM   #10
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