Nice low end for a 10 inch guitar speaker, over all smoother with less ice pic in the highs. I think some of you who play a jazz box would like the low end. Would definitely improve the sound of many low watt tube and solid state amps with stock speakers.

These are the absolute best speakers for a Vibrolux.
Immediate transformation. I even put an Alnico 8 in my Champion 20 and it really made a huge difference.
Years of using these speakers and I still say these are the best.

I originally considered staying with the stock-style Jensen P10R reissue in my 5F10 Harvard because it’s historically correct for the amp, but I wanted something that kept the vintage tweed character while sounding fuller and smoother. After emailing Chris Young at Jupiter, his recommendation was the 10SC, and it makes a lot of sense for this circuit. The Harvard already has a bright, articulate upper-mid voice, and the Jupiter keeps the classic American sparkle while taming some of the thinner, papery top-end character that modern P10R reissues can sometimes emphasize.

The Jupiter 10SC also gives the amp a bigger, richer feel without losing the fast response and touch sensitivity that make a Harvard special. Cleans sound more dimensional, overdrive becomes smoother and more harmonically complex, and the low mids fill out in a way that makes the amp feel less small and boxy. It still sounds unmistakably tweed Fender, just more refined, balanced, and musical — which is exactly why Chris pointed me toward the 10SC in the first place.

Excellent

Highly recommended