Diorio / Tottle backbore info?

brassmoose · Posted: Wed Feb 01, 2023 10:20 pm Post subject: Diorio / Tottle backbore info?

Is anyone familiar with Diorio backbores, mainly the X Caliber line? Sizes 1X 2X 3X 4X 5X etc.? What might these be comparable to?

Also the S series? S, S1, S2, etc….
Numbered bacbores?

Any info is appreciated. Thanks!

Andy Cooper · Posted: Thu Feb 02, 2023 1:21 pm Post subject:

When DiOrio purchased Tottle Mouthpieces - around 2000 - his offerings were standard Tottle mouthpieces. He then expanded the line with a heavy weight backbore and cup weight - then custom tops and backbores.

The 1X was a "utility" general purpose backbore - sort of like a Bach 10. The 2 X was tighter - a lead backbore and the 3X tighter yet but on the dark side.

The DiOrio tops and backbores you now see on eBay are one of a kind models - what's left from an estate sale. The tops look like a mix of Tottle models and Warburton inspired models. These are out of production. If you want duplicates of the tops or backbores they would need to be custom made by a mouthpiece maker.

The backbores and tops (unless otherwise stated) have a different thread than Warburtons.

brassmoose · Posted: Thu Feb 02, 2023 5:12 pm Post subject:

Andy Cooper · Posted: Thu Feb 02, 2023 5:52 pm Post subject:

Some information on Tottle DiOrio backbores -

XL , OX, OO and N are "extra large"

K, G, P, and O are considered "large" but all have a somewhat different sound and feel. The P was a favorite for some piccolo trumpets.

(The G made a trumpet more "Bachish" while the P had more of a "Benge" feel. Maybe a little like a Warburton 8 and Warburton 8*)

J and B are considered to be "medium large"

1X and 1 are " Medium"

2X is "Medium-small"

2 and 3 are "small"

All stock backbores have a 28 throat and a proprietary thread not compatible with Warburton. I'm pretty sure the backbore threads can be turned down and rethreaded for Warburton.

The 1 and 1X work well with the B and C cups - the 2X works well with the D and E cups. You can also have any stock mouthpiece with a #28 throat cut and threaded for Tottle tops.

After that you are looking at one of a kind backbores and cups that Louis designed. The meaning of those markings have probably been lost with his passing.

Keep you eye on Reverb and TH Marketplace - you might find something in time.

brassmoose · Posted: Tue Feb 07, 2023 9:50 am Post subject: