Just an idea

bob123 · 8th April 2006, 04:30 PM

I was wondering if it would be possible (or has been done) to make a speaker that uses hydrolics to increase the movement of the speaker. Using solenoid to move hydrolic fluid which can be used to increase the speed and movement of a speaker. As shown in the (badly drawn) diagram.

Doing this with a big electromagnet to drive the fluid the surface area of the speaker could be huge. It would only be any good for very low (almost subsonic) frequencys. But could seriouly make some bass.

What do you all think?

dscline · 8th April 2006, 10:19 PM

To what end? You are simply trading surface area for excursion. Since displacement is the produce of both, you are gaining nothing. The net result would be that the only difference would be that you'd be adding driven mass and friction, neither of which is a good thing. On top of that, if you believe that doppler distortion is something that can produce noticeable degradation, you are actually better off giving up excursion for greater surface area. The only benefit I see is being able to reduce excursion in the motor, and not having to go to great lengths to provide linear power at such great excursions. But it seems the negatives would far outweigh the positives.

johninCR · 9th April 2006, 10:01 AM

Forget the hydralic fluid, you're just wasting energy and limiting frequency. Use your big electromagnet to drive the voice coil.

mazurek · 9th April 2006, 02:50 PM

I was wondering similar things, I guess they make servo pneumatic cylinders, besides the fact that you would need a compressor, seems like a cool way to push a cone.

bob123 · 9th April 2006, 03:28 PM

Could 2 hydrolic pumps with very fast valves that open proportional to the low frequency bass be used. This would mean that a much cheaper way of producing power could be used. I.E. and engine?

The valves would have to move at a speed allowing each to open and close more than 100 times per second. Allowing bass up to 50hz.
The fluid would also have be under huge pressure.
If this was possible to make then the bass from it could be almost unlimited as the SA and excursion could be huge allowing for huge bass due to the power available from the engine. There would be no problems with heating except friction.

9th April 2006, 10:01 AM	#3
johninCR diyAudio Member Join Date: Apr 2004 Location: Costa Rica	Forget the hydralic fluid, you're just wasting energy and limiting frequency. Use your big electromagnet to drive the voice coil. __________________ Everyone has a photographic memory. It's just that most are out of film.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Different pre amp idea	bartek	Solid State	3	25th March 2008 04:42 PM
I really have no idea what I'm doing here...	d to the g	Multi-Way	10	7th March 2008 07:04 PM
P.S idea	noyan	Power Supplies	15	19th December 2007 09:50 PM
An idea! Fully balanced TDA1541A DAC idea. Please comment!	cartman	Digital Source	8	17th July 2007 09:18 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

8th April 2006, 10:19 PM	#2
dscline diyAudio Member Join Date: Nov 2005	To what end? You are simply trading surface area for excursion. Since displacement is the produce of both, you are gaining nothing. The net result would be that the only difference would be that you'd be adding driven mass and friction, neither of which is a good thing. On top of that, if you believe that doppler distortion is something that can produce noticeable degradation, you are actually better off giving up excursion for greater surface area. The only benefit I see is being able to reduce excursion in the motor, and not having to go to great lengths to provide linear power at such great excursions. But it seems the negatives would far outweigh the positives.

9th April 2006, 02:50 PM	#4
mazurek diyAudio Member Join Date: Aug 2005	I was wondering similar things, I guess they make servo pneumatic cylinders, besides the fact that you would need a compressor, seems like a cool way to push a cone.

9th April 2006, 03:28 PM	#5
bob123 diyAudio Member Join Date: Jul 2004 Location: Southampton UK	Could 2 hydrolic pumps with very fast valves that open proportional to the low frequency bass be used. This would mean that a much cheaper way of producing power could be used. I.E. and engine? The valves would have to move at a speed allowing each to open and close more than 100 times per second. Allowing bass up to 50hz. The fluid would also have be under huge pressure. If this was possible to make then the bass from it could be almost unlimited as the SA and excursion could be huge allowing for huge bass due to the power available from the engine. There would be no problems with heating except friction.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)