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For my speakers, the first thing to upgrade would be the Visaton FR10's. Tang Band (aka TB Speakers) has a series of 4" full range drivers (the W4 series) that outplay the Visatons, but it comes at a price. Have a look here: https://www.parts-express.com/Search.aspx?keyword=...Second best upgrade would be the capacitors in the filter. Audio-grade cap's start at around US$8,- but I think the improvement will be subtle.

Maybe I used the wrong word to describe what I mean. Tweeters, especially dome-tweeters, have a tendency to sound shrill or sharp. You can see that in the tweeter's frequency characteristics: The sound pressure increases as the frequencies get higher. An ideal tweeter would have a horizontal or flat curve, but most tweeters have an ascending curve.Hope this answers your question.Y.

:) glad you noticed.

Thank you, schaapkameel, it's appreciated :)

Thanks!

Particle wood isn’t that bad for prototyping and experimenting with cabinets in my experience. I made the final cabinets from birch, indeed.

:D Thanks for your overwhelming comment!

Ooooww, wonderful!

Wha! They look impressive. Great build, fantastic maiden I'ble!

As I read it, in the top left corner of the diagram the positive side of the two woofers and the tweeter are joined and attached to the positive input of the amplifier (positive sides of the drivers are marked with a dot).

Thanks :) I made the final cabinets from 18mm birch multiplex. Those sound fine :). In general, heavier cabinets are better. What you want is cabinets that resonate as little as possible with the acoustic energy and sound waves from the drivers inside the cabinet. So heavy 20mm teak wood sounds like a good idea to me.

Thanks for the tips! I found the skewed boxes improve the midtones, which agrees with your remark about the subwoofers. I tried both audio-quality PolyFill and pillow-filling as damping material, bit didn't notice much difference. I haven't tried wool, though.

Thank you for the enormous compliment :D

:) Thank you.

Thanks for your great comment. Boosting speaker-building morale was exactly what I was aiming for :). Please post some pics when you made something tangible / audible. Or if you're in need for advice...

That's good to hear! Thanks!Y.

Thank you! That was what I was hoping for :)

Horribly good. The daunting task of writing a horror story lies ahead of me now. And that, dearest ElkeMa, is because you wrote this Instructable. So I hereby blame you for all the hours I have to spend writing a tale of horror. For children to read and shiver by.

Completely adorable!Y.

That is one lovely maiden I'ble!Thanks for sharing :)Y.

I like the supercap-solar panel combination. Does the Vibrobot dance in direct sunlight? And how long does it take to fully charge the cap with the solar panel?Pretty project!Y.

Thanks so much for this post and for hitting the Made It button! Great to hear that the I'ble was useful for you!Y.

It might be overheating. The chip-amps turn off when overheated. Your heatsink seems large enough though. Is it hot just after the sound turns off? Is your case perforated, so that hot air around the heatsink can flow out?

Wonderful! Great build, thanks for the post. Posts like these always make my day :)Y.

You can make one for yourself with this Instructable ;)

Pretty rings, great I'ble. As ever...