|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
| Chip Amps Amplifiers based on integrated circuits |
  |
|
|
|
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 |
 |
|
|
Thread Tools | Search this Thread |
3rd November 2004, 09:45 AM
|
#1 |
|
diyAudio Member
Join Date: Sep 2003
Location: Vilnius
|
Simple (or not so simple) decision
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.
__________________
Nothing is as simple as it seems |
|
|
5th November 2004, 05:34 AM
|
#4 |
|
Electrons are yellow and more is better!
diyAudio Member
|
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/audi...gn_Guide13.xls http://www.national.com/appinfo/audi...sign_Guide.pdf
__________________
/Per-Anders (my first name) or P-A as my friends call me |
|
|
|
5th November 2004, 09:55 AM
|
#5 |
|
diyAudio Member
Join Date: Sep 2003
Location: Vilnius
|
Those values in my first post were taken from this sheet.
Thanks anyway  And yes, probably You are right, bridging two LM3886 per channel (or to be exact, per bi-amped channel, 4 chips total per channel) is a bit overkill 
__________________
Nothing is as simple as it seems |
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Simple Simple SE questions | nodiak | Tubelab | 57 | 2nd February 2010 11:02 PM |
| Simple, SIMPLE Digital volume control | -_nando-_ | Digital Source | 5 | 21st December 2006 01:20 PM |
| A simple question from a simple man. | inteificio | Solid State | 5 | 17th October 2005 03:00 PM |
| Simple answer required for a simple question... | rabbitz | Multi-Way | 4 | 31st August 2003 10:05 AM |
| New To Site? | Need Help? |
| Page generated in 0.07297 seconds (72.64% PHP - 27.36% MySQL) with 10 queries |
