Hi everyone.
I've ordered recently a pair of toroidal 200W trafos with two secondaries of 25VAC, which results in about +- 35VDC.
The question is, which of the locally available chips should I use. The load will most probably be 8ohms, ~40W RMS towers. The best price/quality ratio chips here are LM3886 and LM4766. The first one wants 4ohms, the latter 8 ohms to show all their might. Now, if I get a pair of them per channel, I could bridge two LM3886 and get roughly 200W. And they would be quite happy with +-35V voltage.
The other option is to take two LM4766's and bridge/parallel them, which gives us around 180W. But their supply voltage limit is +-37V, so I could easily get nasty side effects from SPiKe.
Particularly, I don't see much difference in these two choices. Do You?
Any comments are welcome.
I've ordered recently a pair of toroidal 200W trafos with two secondaries of 25VAC, which results in about +- 35VDC.
The question is, which of the locally available chips should I use. The load will most probably be 8ohms, ~40W RMS towers. The best price/quality ratio chips here are LM3886 and LM4766. The first one wants 4ohms, the latter 8 ohms to show all their might. Now, if I get a pair of them per channel, I could bridge two LM3886 and get roughly 200W. And they would be quite happy with +-35V voltage.
The other option is to take two LM4766's and bridge/parallel them, which gives us around 180W. But their supply voltage limit is +-37V, so I could easily get nasty side effects from SPiKe.
Particularly, I don't see much difference in these two choices. Do You?
Any comments are welcome.
Why don't you start with one LM3886, maybe my QRP02 see if this is enough in power?
Ckeck here
http://www.national.com/appinfo/audio/files/Overture_Design_Guide13.xls
http://www.national.com/appinfo/audio/files/Using_Overture_Design_Guide.pdf
Ckeck here
http://www.national.com/appinfo/audio/files/Overture_Design_Guide13.xls
http://www.national.com/appinfo/audio/files/Using_Overture_Design_Guide.pdf
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