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Old 4th January 2004, 12:20 AM   #1
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Default HIGH Power Sub amplifier?

I know alot of people have been asking about Sub Amplifiers but I can't seem to find what I'm looking for. I'm planning on using a PPI Pro Flat piston 10 for my HT and music listening.

The sub is rated at 300 RMS and it's a single 4ohm voicecoil. Anyone know of a 300-400 watt Sub amp that can run continuously into a 4ohm load. I have looked at the 300w Subwoofer amplifier on ESP and was trying to find a few more alternatives.

http://sound.westhost.com/project68.htm

I also have looked into the Leach amps but have been unable to find a version that will output 300-400w RMS into 4ohms.

http://users.ece.gatech.edu/~mleach/lowtim/

Thanks
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Old 4th January 2004, 11:55 AM   #2
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Arrow Reply

CLASS_D OR CLASS_AB AMP PLEASE CONFIRM???
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Old 4th January 2004, 05:46 PM   #3
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Default CLASS_D OR CLASS_AB AMP PLEASE CONFIRM???

I do not have much experience with Class D DIY amps. I would assume a Class AB would be more fitting for this application. I am really just trying to find some other possiblilities, so really any projects complete with PCB layouts, component lists and a schematics would help. I would be interested in reading up on Class D construction if you have any information on some possible amps. Thanks
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Old 4th January 2004, 07:17 PM   #4
ukram is offline ukram  Finland
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ClassD is good for subs, because it has good efficiecy -> lots of power can be generated without cooling problems. Also distortion is lower for low frequencies.

I'm currently designing a classd amp.

Simulation picture (just the integrator and simple oscillator and comparator):

http://hepso.dna.fi/misc/classd/clas...simulation.jpg

And the LTSpice simulation file:

http://hepso.dna.fi/misc/classd/clas...simulation.asc
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Old 4th January 2004, 10:57 PM   #5
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Default Re: HIGH Power Sub amplifier?

Quote:
Originally posted by Killjoy99
I also have looked into the Leach amps but have been unable to find a version that will output 300-400w RMS into 4ohms.
http://users.ece.gatech.edu/~mleach/lowtim/
Looking at the Leach amp, it probably would do the job as
specified, and if you are insecure about that, double up
the number of output devcies in parallel.

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Old 5th January 2004, 02:28 AM   #6
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Default Looking at the Leach amp

Thanks for the help everyone. I am trying to contact Professor Leach, regarding the stability of both his Leach amp and SuperLeach amp designs. In the mean time I'm going to double the Output Devices of the Leach Amp as Mr. Pass suggested and see how that comes out.

It's gonna be fun...lol
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Old 5th January 2004, 05:30 AM   #7
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Default Doubling the number of Output devices

After reviewing the Leach Amp Schematics I am to unfamiliar with this setup to double the output devices. Can anyone help me successfully alter the schematic added double the amount of output devices to improve stability? I'm still trying to understand and learn a lot of the basics here.

http://users.ece.gatech.edu/~mleach/lowtim/

Thanks
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Old 5th January 2004, 06:31 AM   #8
Jean is offline Jean  United States
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Maybe Optimos(sp) ?
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Old 5th January 2004, 06:51 AM   #9
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Default Optimos(sp)?

I'm not familiar with Optimos(sp). Could you elaborate on it more, please.
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Old 5th January 2004, 07:09 AM   #10
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Hi

My Symmetrical amplifier will drive that sub @ 400 Watts RMS day in day out.


Cheers

Anthony Holton
www.aussieamplifiers.com
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