Anyone know where one can be purchased from, and for how much? Limited information on the Yamaha site, and I can find no online retailers listing it. PM1X also available for tuba now, built on the same resonance-enhancement technology used by the trumpet and trombone mutes.

There's a video on the Yamaha Atelier Hamburg FB page showing the tuba model. I have sent a message asking them about availability, but no response yet.

I love the trombone one, and haven't been able to find a comparably good euphonium practice mute.