I had an idea...maybe a brainstorm result..some neuroniuns re-started to work

[destroyer X]

maybe not more than a menthal diarrea.

Imagine 2 speakers, one against the other, one facing the other..the diafragm, the moving cone, glued one to the other with a plastic ring or other kind of ligthweigth link.

This way..when one moves forward, the other moves backward,

This may be interesting, to produce a spherical speaker... each one 4 ohms, connected counter phase, them you can install it as a class A colector load... a direct coupling without the problem to have the speaker moving upwards or downwards as result of the current crossing the coil... this way..when one speaker try to move forward, the other will push it back with the same strengh..so..as a result they will not move.

Now you install a 16 volts supply.. speaker in series, counterphase connected, represents 8 ohms...so, you will keep 8 volts into the speakers and 8 volts into the transistor, from colector to emitter;

This will be 1 ampere crossing each 4 ohms coil..this will result 4 watts wasted in each speaker...total of 8 watts waste of power.

But..you gonna have audio AC swing that will produce audio, and nice quality audio, as the colector load is a real speaker, not a resistance, not a transformer primary and not a condenser coupling component... also you can use single ended, and not a dual supply.

I will produce a prototype... i found this interesting and i hope it will work fine.

Negative... 4 watts is not too much power to a speaker coil... 10 watts continuous start to be dangerous, but i believe it can hold 4 watts...well... this i gonna see soon

ahahahahahah!

regards,

Carlos

[destroyer X]

The second supply, a voltage regulator, very well filtered, an adjustable power supply, will push the speaker to the resting position.

I think the image talk by itself..the speaker is a double coil speaker.

regards,

Carlos

[destroyer X]

http://www.youtube.com/watch?v=D60gBbvd2go

[Bigun]

the link isn't working ?

Carlos - we want to know more about DX loudspeaker. If not this idea, then another one. You gave us many insights into amplifiers but it is much more important to look at the speaker.

[Bigun]

I have an idea to add...

Make it Class AB, each speaker cone with it's own device they will tango together and make music

Also turn them around, you can bolt the pole pieces together and the the cones are free to sing facing outwards.

[destroyer X]

reason why i prefere not even to start this subject.

Also, this thread, and the solid state forum is not for this purpose...we can even do it, and moderators will let we go for a while....but i prefer not to do things that will end with them asking us to go back to the track once again... and i could see them doing that several times.

I can understand my idea have not fascinated you....also that you want to have this conversation with big charlie..but really,you are trying to find watter into a desert.. i am very stupid about that stuff.

I have mine Sansui speaker, and friends have some famous brazilians expensive and good brands, and i do my tests with them and also i use to check with a Senheiser headphone one of them has.

I suggest you try to motivate Doctor Rabbitz to open his mouth... the one is the "master of the universe" about speakers..the ones assembled hundreds, and understand a lot about capacitors, coils, speakers brands, models, how to build, how to tune and all tips and tricks needed.

A pitty is that Rabbitz is someone that has some health problems and he is trying to avoid contact into the internet...he cannot stay for too long into the computer..the man is "the brain" about speakers...i told him he should write a book when he could do it..now he cannot anymore and this is a shame...a lost for the humanity, as he is not young, and in a matter of 30 years he will be in the other dimension and we gonna loose all the stuff is inside his brain.

Ask him, please, to talk with you about that stuff...not me dear Bigun.... i am a hell empty headed to that stuff, i know 10 percent he knows!

Rabbitz is loosing his time trying to help Professor Smith, into the thread "professor smith needs help".

I have asked you age Bigun..can you inform me, please.

regards,

Carlos

.................................................. .................................................. ..

Image is one from the several speaker Rabbitz built.
.................................................. .................................................. ...

[Richard Ellis]

Carlos:
From a high fidelity standpoint this speaker arrangement won't work very well.
From a driver point of view recall the parameters of a driver.
Qes..the electrical damping of a driver (Electrical control)
Qms..the mechanical damping (Mechanical control)
Qts...the "composite" of the previous two
Qtc...the practical composite as in "encased" into an enclosure
The air trapped between the two cones will make a very 'stiff' air suspension...limiting cone travel and killing any possibility of Bass performance.
However...Two cones wired 'out-of-phase' is easily done and is of the "Isobaric Push pull"configuration.. a common subwoofer design.
______________________________________________Rick ......

[Wavebourn]

Hi Carlos, what do you see on the picture?

[Bigun]

Originally posted by destroyer X
I can understand my idea have not fascinated you....also that you want to have this conversation with big charlie..but really,you are trying to find watter into a desert.. i am very stupid about that stuff.

I thought I had tempted you into talking about speakers, I tried, with all good intentions, only good intentions, because you know about sound. I want to know what speakers you have heard that have good sound and why they have good sound.

Your idea did fascinate me if it is to put the speaker into the amplifier, this must be a good idea because it recognizes the fact that it is the combination that we hear. What you did was scare me with the large Class A current through the coils when I see that people are trying to reduce their amplifier dc offset from 50mV to 2mV or zero. With the Class AB approach, can your idea blossom ?

[Bigun]

Originally posted by destroyer X
I have asked you age Bigun..can you inform me, please.

Sorry - I did send an email, forgot that you closed your inbox except to family.

Well, I am going to be 45 yrs on 20th June.

You might find it difficult to determine age from my posts - people are not accustomed to a 45yr old seeking so much help and having to learn a lot of things that are simple for those with the relevant experience. But as confidence grows you notice there is more than you would expect from a young person ?

EDIT: I looked at the photo of Rabbitz speaker. Wow, what kind of speaker is that, at the back, levitating in the air