Simple Symetrical Amplifier - Page 347

Nico Ras · 17th October 2012, 07:29 PM

I am sure someone has thought about it but what about 22 mosfet switches driving 22 little speakers on a baffle directly from binary output - everything is digital. 22 bits set 22 cones move forward, 2 bits set two cones move forward, etc.

Esperado · 17th October 2012, 07:39 PM

Quote:

Originally Posted by Nico Ras

I am sure someone has thought about it but what about 22 mosfet switches driving 22 little speakers on a baffle directly from binary output - everything is digital. 22 bits set 22 cones move forward, 2 bits set two cones move forward, etc.

:-) But i can't imagine that. Acoustic coupling between 2 speakers can lead to 0db output up to +6db at low frequencies comparing to one. (3db average)...

Cambe · 18th October 2012, 05:43 AM

Film flopped or reversed,lettering scrapped off ~
Thanks!

Lazy Cat · 18th October 2012, 06:30 AM

Very good Cambe

New SSA will sing soon.

naf · 06:52 AM

Hi Shaan, any news of SSA Servo version?
i try to draw unused op amp pin like this, any suggest?

naf · 18th October 2012, 06:55 AM

Quote:

Originally Posted by Cambe

Film flopped or reversed,lettering scrapped off ~
Thanks!

very good PCB artwork

shaan · 18th October 2012, 07:32 AM

Hi cambe. Very nice.

Hi naf. I'm out of home now and will be for the next two weeks, so no ssa for me now

. The servo peeceebee artwork is almost ready, but have to do a final checking. I have also prepared a solder mask for clean soldering, a better silkscreen and minor changes from the shown example. Will be uploaded in first week of november. Thanks for your patience.

Btw, pin 3 of opamp goes to ground. Pin 2 and pin 1 are conected to each other only.

A friend here has built 4 pairs of SSA peeceebee. I wanted to grab a pair from him ASAP, but will have to wait two looong weeks now. Pity me.

It's festive season here... Taking a tour to the village where I was born 27 years ago. Right now typing through my cellphone from inside the plane. Yeppiii! Whoooshh...

naf · 18th October 2012, 07:43 AM

Quote:

Originally Posted by shaan

Hi cambe. Very nice.

Hi naf. I'm out of home now and will be for the next two weeks, so no ssa for me now

. The servo peeceebee artwork is almost ready, but have to do a final checking. I have also prepared a solder mask for clean soldering, a better silkscreen and minor changes from the shown example. Will be uploaded in first week of november. Thanks for your patience.

Btw, pin 3 of opamp goes to ground. Pin 2 and pin 1 are conected to each other only.

A friend here has built 4 pairs of SSA peeceebee. I wanted to grab a pair from him ASAP, but will have to wait two looong weeks now. Pity me.

It's festive season here... Taking a tour to the village where I was born 27 years ago. Right now typing through my cellphone from inside the plane. Yeppiii! Whoooshh...

Shaan, have a nice trip...

shaan · 18th October 2012, 07:54 AM

Thanks naf.

Esperado · 09:47 AM

Quote:

Originally Posted by naf

i try to draw unused op amp pin like this, any suggest?

And, may-be it would be good to add two 1nF film caps from OP amp power rails to ground for proper decoupling. TL 072 are quite stable, but some would like to use some other opamp they have as spare parts.

17th October 2012, 07:29 PM	#3461
Nico Ras diyAudio Member Join Date: Nov 2005 Location: Amanzimtoti - East Coast of South Africa	I am sure someone has thought about it but what about 22 mosfet switches driving 22 little speakers on a baffle directly from binary output - everything is digital. 22 bits set 22 cones move forward, 2 bits set two cones move forward, etc. __________________ Kindest regards Nico

18th October 2012, 07:32 AM	#3467
shaan diyAudio Member Join Date: Mar 2009 Location: Near the Ganges	Hi cambe. Very nice. Hi naf. I'm out of home now and will be for the next two weeks, so no ssa for me now . The servo peeceebee artwork is almost ready, but have to do a final checking. I have also prepared a solder mask for clean soldering, a better silkscreen and minor changes from the shown example. Will be uploaded in first week of november. Thanks for your patience. Btw, pin 3 of opamp goes to ground. Pin 2 and pin 1 are conected to each other only. A friend here has built 4 pairs of SSA peeceebee. I wanted to grab a pair from him ASAP, but will have to wait two looong weeks now. Pity me. It's festive season here... Taking a tour to the village where I was born 27 years ago. Right now typing through my cellphone from inside the plane. Yeppiii! Whoooshh... __________________ SSA Important Post Links:- How SSA Works, Nico's SSA, Nico's Thoughts on SSA Sound, Alex's SSA Mono PCB, LC's Scope Traces, SSA BIGBT PCB, SSA High Power Low Zout PCB, PeeCeeBee, SSA Speed, Why Current Feedback, Why SSA Is Unique, 20 Reasons To Go For SSA

18th October 2012, 07:54 AM	#3469
shaan diyAudio Member Join Date: Mar 2009 Location: Near the Ganges	Thanks naf. __________________ SSA Important Post Links:- How SSA Works, Nico's SSA, Nico's Thoughts on SSA Sound, Alex's SSA Mono PCB, LC's Scope Traces, SSA BIGBT PCB, SSA High Power Low Zout PCB, PeeCeeBee, SSA Speed, Why Current Feedback, Why SSA Is Unique, 20 Reasons To Go For SSA

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18th October 2012, 06:30 AM	#3464
Lazy Cat diyAudio Member Join Date: Sep 2007	Very good Cambe New SSA will sing soon.

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