best LM3886 config for 6 ohms?

zafira1981 · 6th February 2006, 06:02 PM

What is the best config for a 100 - 150 W for 6 ohms speakers?
2 parallel? bridged?
I will use this speakers
http://www.yamaha.ca/av/speakers/PDMSeries/NS150.asp

thanks

zafira1981 · 7th February 2006, 12:52 AM

Zzzzz,......

anybody there? ?

sidehack · 7th February 2006, 02:36 AM

Is that looking for 100-150 watt per channel, or total?

I'm still just a little guy but I'd say probably parallel. You can do 100W into 6 ohm with 25V and about 4A. That's enough voltage for the 3886 to handle with ease, but enough current to merit paralleling.

If you bridged, the supply voltage could be lower for the same effect but I believe each chip would be driving twice the current.

zafira1981 · 7th February 2006, 12:12 PM

Quote:

Originally posted by sidehack
Is that looking for 100-150 watt per channel, or total?

I'm still just a little guy but I'd say probably parallel. You can do 100W into 6 ohm with 25V and about 4A. That's enough voltage for the 3886 to handle with ease, but enough current to merit paralleling.

If you bridged, the supply voltage could be lower for the same effect but I believe each chip would be driving twice the current.

I'm looking for 100 - 150W per channel.

For power supply I have 2 transformers that I could use.
first: 18-0-18 350 VA (EI)
second: 4x 12V 150VA toroidal, 24-12-0-12-24

why 4? because in my country i cant find 24-0-24 toroidal.

Maybe for the first trans. I should use bridged, and parallel for the second option.

thanks!!!
Jorge.

Bazukaz · 7th February 2006, 12:23 PM

Try searching overture_design_guide14.xls at www.national.com

zafira1981 · 7th February 2006, 12:26 PM

Quote:

Originally posted by Bazukaz
Try searching overture_design_guide14.xls at www.national.com

Downloading.....

Roushon · 7th February 2006, 12:39 PM

Quote:

Originally posted by zafira1981
What is the best config for a 100 - 150 W for 6 ohms speakers?
2 parallel? bridged?
I will use this speakers
http://www.yamaha.ca/av/speakers/PDMSeries/NS150.asp

thanks

I asked a similar question in this forum quite sometime back and had a number of reply. If interested then click on the following link.

Bridge or Parallel?

Bazukaz · 7th February 2006, 12:42 PM

I would recommend reading BPA-200 app note also(you can find at national's site too).

zafira1981 · 7th February 2006, 12:47 PM

Quote:

Originally posted by Roushon

I asked a similar question in this forum quite sometime back and had a number of reply. If interested then click on the following link.

Bridge or Parallel?

Thanks!!! I'm looking your thread.

zafira1981 · 7th February 2006, 01:03 PM

Quote:

Originally posted by Roushon

I asked a similar question in this forum quite sometime back and had a number of reply. If interested then click on the following link.

Bridge or Parallel?

well I've read your post and was very helpfull. did you build the project?

I'm thinking on use your schematics as "base" of my project, if you dont mind. But, with some modifications.
per channel:

2xLM3886T
1xLF412
1xAD620 or 1xNE5534

why? because I cant find here variety of opamps.

I will start drawing

6th February 2006, 06:02 PM	#1
zafira1981 diyAudio Member Join Date: Jan 2005 Location: Argentina	best LM3886 config for 6 ohms? What is the best config for a 100 - 150 W for 6 ohms speakers? 2 parallel? bridged? I will use this speakers http://www.yamaha.ca/av/speakers/PDMSeries/NS150.asp thanks

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7th February 2006, 12:52 AM	#2
zafira1981 diyAudio Member Join Date: Jan 2005 Location: Argentina	Zzzzz,...... anybody there? ?

7th February 2006, 02:36 AM	#3
sidehack diyAudio Member Join Date: Jan 2006 Location: Missouri	Is that looking for 100-150 watt per channel, or total? I'm still just a little guy but I'd say probably parallel. You can do 100W into 6 ohm with 25V and about 4A. That's enough voltage for the 3886 to handle with ease, but enough current to merit paralleling. If you bridged, the supply voltage could be lower for the same effect but I believe each chip would be driving twice the current.

7th February 2006, 12:23 PM	#5
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	Try searching overture_design_guide14.xls at www.national.com

7th February 2006, 12:42 PM	#8
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	I would recommend reading BPA-200 app note also(you can find at national's site too).

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