serched forum and fined that lm3886 is good for sub amplifier.
i need some amp, about 100w rms to run 4ohm drive (focal 30a1 sub), can two lm3886 in parallel aplication run focal 30a1 ?
would 225VA transformer run that amp?
need some shematic, i found something but i wont aou guys to tell me, whats the best... many thanks.
i need some amp, about 100w rms to run 4ohm drive (focal 30a1 sub), can two lm3886 in parallel aplication run focal 30a1 ?
would 225VA transformer run that amp?
need some shematic, i found something but i wont aou guys to tell me, whats the best... many thanks.
bego2 said:
Have a visit to my Blog - http://diygainclone.blogspot.com/2008/07/subwoofer-filter-pcb.html
bego2 said:
Schematic link was also there - anyways this is the link
http://sound.westhost.com/project48.htm
I use to sell a ParaPix Sub amp and there were 2000
of them, they are all gone and there is some information
and schematic on this page, near the bottom.
HTH's
They used 2 LM 3886T's
http://www.apexjr.com/parapixinfo.html
Steve @ Apex Jr.
of them, they are all gone and there is some information
and schematic on this page, near the bottom.
HTH's
They used 2 LM 3886T's
http://www.apexjr.com/parapixinfo.html
Steve @ Apex Jr.
bego2 said:any link?
i need project with layout board!
Example:
http://www.shine7.com/audio/bpa300.htm
Have you seen this?
Probably the simplest way to build an amplifier, if your hands are not too shaky.
For parallel application you build that twice and connect the input in parallel to both ICs. Connect a resistor 0,1Ohm 3W or 0,22Ohm 5W to each output. Connect the open ends of the resistors together and connect the speaker there.
If you build a parallel application, you need to make sure that the three resistors Rb, Rf, Ri are matched to 0,1%. Rb is not in the schematic in the above link, but you should fit it in between Rg and the ICs non-inverting input. Use the same value as for Ri.
Add a snubber 2,7Ohm and 100nF to the output.
Add some bigger capacitors to your PSUs, because you want punch for a subwoofer.
Probably the simplest way to build an amplifier, if your hands are not too shaky.
For parallel application you build that twice and connect the input in parallel to both ICs. Connect a resistor 0,1Ohm 3W or 0,22Ohm 5W to each output. Connect the open ends of the resistors together and connect the speaker there.
If you build a parallel application, you need to make sure that the three resistors Rb, Rf, Ri are matched to 0,1%. Rb is not in the schematic in the above link, but you should fit it in between Rg and the ICs non-inverting input. Use the same value as for Ri.
Add a snubber 2,7Ohm and 100nF to the output.
Add some bigger capacitors to your PSUs, because you want punch for a subwoofer.
http://users.tpg.com.au/users/gerskine/dxamp/
You can manage a chipamp, so you are ready for the next step... assembling this real 100W into 4R amp should be within your reach now... It will cost about the same as a chipamp, but will eat it for breakfast in a sub. Look up the original DX.
You can manage a chipamp, so you are ready for the next step... assembling this real 100W into 4R amp should be within your reach now... It will cost about the same as a chipamp, but will eat it for breakfast in a sub. Look up the original DX.
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