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Is this boxed?  How are your speakers or speaker jacks mounted? Could it be you're shorting one input or speaker output somehow?

Also, what is the impedance of your speakers?

Put some pictures of your builds up.  It would help to see how things are mounted and wired.

Meantime it looks like it can be done

http://www.eleccircuit.com/small-stereo-amplifier-with-tda7052/

Looks like they added a cap to remove noise.

Anyway, I think it's a cool idea, but there's similar chips that are stereo and maybe better suited to what you want to do, aside from possibly needing a voltage regulator or having different output.

What are you connecting to left and right?

Shot in the dark, but try connecting pin 3 of u1 to pin3 of u2, and do the same with pin 6.

Wouldn't hurt to check all your solder joints and traces either.

Sending best wishes and prayers from the other side of the globe. Family first!

Based on your post about reflow, I think you may have done a little heat damage to your jfets, which made them less of a match. Possibly you have a wrong part value somewhere.

This guy posted some results about tolerances of smd jfets vs thru hole (near the bottom).

http://surfybear.weebly.com/blog/the-jfet-tester

When I did my phase90 smd layout, I used two dual jfet packages for the jfets. I did no matching, and both came off the same tape. I built two boards, both worked great with very little adjustment to the trimmer.

I would expect the tolerances within the same packaged pair to be very close unless one side got a little fried. I would expect more variation between packages but still probably close enough if they're off the same tape.

Awesome, love the look of this! 

As for the regulator, it's possible the via underneath doesn't have enough soldermask over it ("tenting").

The vias I see do look kind of big so it's harder to cover them consistently. You could probably put a small piece of tape over the via just to be safe.

cool build. it's like a chevy s-10 with a corvette motor tucked under the hood.

sweet builds jimi

No problem!  I can send you the libraries I ported, pm me.  FWIW I actually need to update them for the 2017 mb stuff. 

Nothing against eagle here either, I just found diptrace a little easier for me.

Also, I forgot to add this- The preview image should give enough info to get your holes in the right place. 

But, if you want it to look more like the MB templates, you can take the image you save from the preview, and use a layered photo editor (photoshop, paint.net, etc) to make a clean overlay.  Then hide your original layer and export. 

Just watch out for resolution/scale changes.  I try to keep everything at 300dpi for consistency.

This same approach also offers an easy way to get your graphics to line up a little better if you're doing any etching or decals.

got to be fun to monkey around with that one

nice job!

Very cool!  fantastic etch, didn't realize how much I missed access to a laser until just now.

I use and love diptrace.  You're almost there.  It looks like you already have the enclosure in there so that will help a lot.

Some of the pot components have little center marks included- it looks like your's don't.  I ported the madbean eagle library over to diptrace a while back, since it includes many such useful things to us stompbox guys.  I think the rullywowr diptrace library includes some similar parts, which include the centers.  I tried to include an attached image, hope you can see it.

So, you might have to go back and "replace" components in schematic land so they have the marks you want included. You might have to rotate or tweak things a bit. Then update your layout so it includes the new parts in your schematic.  (This sounds harder than it is.  Save your updated schematic.  Go to file-renew design from schematic, and browse to the schematic file you just updated.  There might be some slight tweaking needed to the layout after you hit ok, but if it gets screwed up, you can undo, and don't have to save it!) 

After that, you can do the file-preview thing and toggle what's included in the view.  You can also scale everything to 100%, and save as an image.  The save image dialogue also lets you specify dpi.

I'm sure you could work up a little breakout board on OSHpark to approximate the ring, the problem is its actually set down into the plastic of the switch itself, so it would take a bit of extra work to get it to look the same.

I actually started doing just that a month or two ago.

But the thing that's missing is the plastic "light ring".

The hole thru the box afik is a little bigger to let the light thru. So the ring needs to both take up the extra space to hold the switch secure and diffuse the leds.

Probably a $0.30 endevour but I doubt you could buy just the parts.

omg, Fortitude was awesome.  A few things that I didn't care for, but overall a great watch.  I think I liked season 1 better though still worth watching season 2.

Just watched silicon valley s4, and will likely start "westworld" and/or "the night of" soon.

Cool build!

Awesome!