RE: LM3886 BASED POWER AMP FOR ACTIVE SPEAKERS

0 Members and 1 Guest are viewing this topic. Read 1024 times.

OSIB16

  • Full Member
  • Posts: 302
RE: LM3886 BASED POWER AMP FOR ACTIVE SPEAKERS
« on: 23 Jan 2022, 08:38 pm »
I need some guidance with an active loudspeaker project (Bang Olufsen BEOVOX CX100) that I intend to put together; which uses multiple LM3886 power amps. I need separate ones to power the tweeter, midrange and woofer. The photo below shows the actual LM3886 board that I intend to use. I’m going to swap the caps to Sonicap Platinum, Elna Silmic II, Mundorf AG with Mills resistors…


OSIB16

  • Full Member
  • Posts: 302
Re: RE: LM3886 POWER AMP FOR ACTIVE SPEAKERS
« Reply #1 on: 23 Jan 2022, 08:43 pm »
Here is the suggested transformer…



OSIB16

  • Full Member
  • Posts: 302
Re: RE: LM3886 POWER AMP FOR ACTIVE SPEAKERS
« Reply #2 on: 23 Jan 2022, 08:49 pm »
The suggested power regulator board…








OSIB16

  • Full Member
  • Posts: 302
Re: RE: LM3886 POWER AMP FOR ACTIVE SPEAKERS
« Reply #3 on: 23 Jan 2022, 08:54 pm »
I would like to use a similar layout to this photo of a setup shown on YouTube…


OSIB16

  • Full Member
  • Posts: 302
Re: RE: LM3886 POWER AMP FOR ACTIVE SPEAKERS
« Reply #4 on: 23 Jan 2022, 08:57 pm »
Here is a diagram that I created on an art software; which shows how I intend to put the project together ((it’s not perfect. Help needed))




dburna

Re: RE: LM3886 POWER AMP FOR ACTIVE SPEAKERS
« Reply #5 on: 23 Jan 2022, 09:02 pm »
One suggestion -- rather than spend big $$$ (and effort) on replacing caps with expensive variants -- an endless chase -- take a good look at Neurochrome amps: www.neurochrome.com. Those amps are much better than the ones you have listed and won't require the time/effort to modify. Plus, after you spend all the time/money on the caps, I bet the net cost is about equal. And you'll end up with a much better amp to boot.

Read about Neurochrome on their website and read comments on DIYAudio. You can thank me later.

Best, -dGB

P.S. Just re-read your post. If the boards are already a sunk cost for you -- looks like that is the case -- then, as Emily Latella used to say, "Nevermind".  :lol:
« Last Edit: 23 Jan 2022, 11:00 pm by dburna »

OSIB16

  • Full Member
  • Posts: 302
Re: RE: LM3886 BASED POWER AMP FOR ACTIVE SPEAKERS
« Reply #6 on: 23 Jan 2022, 09:15 pm »
Thanks, the Neurochrome stuff looks amazing. Unfortunately I have already purchased six of the black LM3886 (ready built boards) for a total of $80.