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Modulus-686: 380W (4Ω); 220W (8Ω) Balanced Composite Power Amp with extremely low THD

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tomchr

tomchr

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Joined 2009
neurochrome.com
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This is what 250 LM3886T/NOPB look like fresh from Mouser. I now have more LM3886es in stock than any of the major North American distributors. :) They will soon find new homes in the Modulus-686, -286, and -186 modules.

I expect to have a small handful of MOD686 assembled modules in stock by the end of the weekend.

Neuroscience papers included for scale and to highlight my multiple facets of geekdom. :)

Tom
 

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asuslover

asuslover

Member
Joined 2016
tomchr said:
This is what 250 LM3886T/NOPB look like fresh from Mouser. I now have more LM3886es in stock than any of the major North American distributors. :) They will soon find new homes in the Modulus-686, -286, and -186 modules.

I expect to have a small handful of MOD686 assembled modules in stock by the end of the weekend.

Neuroscience papers included for scale and to highlight my multiple facets of geekdom. :)

Tom
Click to expand...


Why mouser? You could get them from ebay/china much cheaper and guaranteed fake!:D
 
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tomchr

tomchr

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Life's too short for fake parts. That's why I go through the distributors. Mechanical bits, such as machine screws, I get at McMaster-Carr (who now ships from Canada!). My PCBs are made in Ontario, Canada and assembled here in Calgary. The assembly place is a 15-minute drive from my house. The aluminum brackets and back plates are made in Nova Scotia, Canada. Sensing a theme? :)

Tom
 
poseidonsvoice

poseidonsvoice

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Joined 2004
audiocircle.com/gallery/index.php?cat=48485
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tomchr said:
Life's too short for fake parts. That's why I go through the distributors. Mechanical bits, such as machine screws, I get at McMaster-Carr (who now ships from Canada!). My PCBs are made in Ontario, Canada and assembled here in Calgary. The assembly place is a 15-minute drive from my house. The aluminum brackets and back plates are made in Nova Scotia, Canada. Sensing a theme? :)

Tom
Click to expand...

Yeah. No BS Engineering. That’s the theme. Accountability. That’s the other theme. Repeatability. There’s the third theme.

Best,
Anand.
 
tomchr

tomchr

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Joined 2009
neurochrome.com
Paid Member
Yeah... I don't miss winding inductors. Others find them convenient as well. In fact, I'm almost out. I think I have 20 left that aren't reserved for the MOD186/286 build.

Unfortunately that means I'll run out of inductors before the end of November. I ordered 500 (yes, five hundred!) 2-3 weeks ago. They'll be ready by the end of January. Yep. Three month lead time. Grr!

Now, of course this means I may be out of the SMD pre-populated MOD686 board option by the time the inductors show up. The joy of inventory management. :) I've set up my website to allow backorders of the inductors, so there's always that option. I'll fill your order when the inductors come in.

But at least for now, everything Modulus-686 related is in stock. :)

Tom
 
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BYRTT

BYRTT

Member
Joined 2009
daansan said:
..I’m missing a good DAC in this system, which is limiting somewhat in truly assesing it’s performance. But the first listening impressions of the Mod686 have been very good...

...as a DIY enthusiast it makes me happy that yet another component in my set was assembled by myself...
Click to expand...

Was lately guided to below objective review site when tomchr posted he have shipped a Neurochrome HP-1 (headphone amp) over to them, in that regard stumbled over those relative great objective numbers for that inexpensive 99 buck DAC in below link, okay it lacks ballanced output but cost verse its benched numbers and that you can assemble your own unit could maybe be of interest or fill in as a temporary upgrade, also by the way thanks for the detailed interesting build story it was great reading.

LINK: Review and Measurements of WesionTEK Khadas Tone Board DAC | Audio Science Review (ASR) Forum
 
Z

zman01

Member
Joined 2011
tomchr said:
Spent some time soldering this afternoon. Two of these are spoken for already.

The fully built module comes with the wiring harnesses, input connector, and a sleeve of Wakefield 120 thermal paste.

Tom
Click to expand...

Tom,

Very nice, and very pro looking. Great to see that you've taken customer feedback and incorporated that into your module mounting solution. Whole assembly of aluminum back-plate and clamps should make customer installation more easy and foolproof. The blue clamps also go well visually with the blue PCBs. :)
 
H

HarmonicTHD

Member
Joined 2017
tomchr said:
Spent some time soldering this afternoon. Two of these are spoken for already.

The fully built module comes with the wiring harnesses, input connector, and a sleeve of Wakefield 120 thermal paste.

Tom
Click to expand...

Looks nice indeed.

What about giving the option of ordering vertical connectors or at least ordering without the connectors assembled. A lot of recent builts used the vertical ones for space reasons. One could even use the gold plated ones if one so desires. I know inventory challenge and the like ...

My two cents.

Clamps are definitely a good thing and great looking too.
 
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