I love my Jupiters! They sound wonderful, and the break-in service is really a nice, economical way to get them sounding great from the first minute you turn them on!

I bought my first a couple years ago and had to have another, awesome, the best.

I'm not sure how this would have sounded if I hadn't opted for the break in. I have experienced drastic improvements in other speakers as they break in, however, and wanted to start using the amp in question right away.

The first gig I used the amp for was a delight. The sound and response from the amp was wonderful. Exactly the sound I was looking for--especially compared to the stock speaker I had in my Fender Vibro Champ Reverb. It went from a decent amp, to a perfect amp.

Got the M10C for my Marshall Class 5, fits perfectly, sounds excellent.

It's hard to rate the break-in service because I don't know how would the speaker sound otherwise, but I can tell it sounds good out of the box.