[sonicboom]

H Boris,

Just came across the link bellow. Is this just an aesthetic upgrade, or is it more than skin deep?

https://www.youtube.com/post/UgzUNsKlKiXEgYkUEj94AaABCQ

[Audiovista]

All right, the word is out! I am excited to hear what Sean has to say 

It was a challenge to find a reasonable upgrade that will not break the bank. I think I finally managed to do it. Here is a preliminary web page with more details:

http://vista-audio.com/products/spark/index_NEW.htm

[sean619]

Looks good! What transistor are you using? FET?   LM3886 chip?

[Audiovista]

And the first review is out, more to come 

https://youtu.be/C0nQ2uehI08

We are using one of the class AB chips from the TI's Overture Series.

LM3866 is a fine chip with more power, but I felt this other one offers superior sound - superior enough to sacrifice output power. I think I posted this in one of the earlier threads... the Spark was not a planned product, as I was testing various chips for a different application; however, I liked the sound of this part so much that I decided to make a product out of it, even though I knew that its low power would make it a niche. So I streamlined design, made it clean and straightforward (no bells and whistles), thinking: "if it's niche, let's shoot for the best in the segment".

Turns out, it's not so niche - by now we have a good collection of speakers that love the Spark and they are of various types, sizes, sensitivities and price ranges.