model by Cannonball is definitely unique and a great playing experience.
The Big Bell Stone Series comes with two necks, a traditional style neck and an underslung octave key style neck called the "Fat" neck. They each provide a different playing experience, and I'll start the review by outlining their differences. The Fat neck was my preferred of the two.
The Fat Neck
What initially interested me about this horn was its similarity to the vintage Selmer Super Balanced Action tenor I used to own. The similarities are very striking. The sound, though certainly not identical to an SBA, is warm, powerful, and somewhat spread. It is also very flexible, easy to inflect in all registers including the altissimo, and able to transform from warm and lush to punchy and thick. This kind of flexibility does requires good air support, and some might find the feeling a little too free-blowing. That free-blowing element also allows extreme control over dynamics and other subtleties that you can't always control as minutely otherwise.
Here are a couple of sound clips with the Fat neck:
The Traditional Style Neck
The traditional neck is a little brighter in tone quality, but has less core to it. It is also more supportive in terms of air efficiency, which makes it feel slightly less free-blowing. It is still easy to inflect and mold the sound, however I didn't feel like I had quite the same freedom and control as I did with the Fat neck.
Here is a clip with the traditional style neck:
The rest of the playing experience is great overall. The key work is solid. It feels slightly unique, but I was able to adjust easily to it. The biggest quirk in the key work is the distance of the left hand spatula (pinky) keys. They might have been a little too far for me. The intonation seems fantastic and easy to work with. Nothing stuck out there. Overall, this is a great horn and possibly my favorite modern horn so far.
Conclusion: A warm, flexible yet powerful, modern horn. A great playing experience.