Descriptions taken from the Pickett-Blackburn Website
Regular Length (Bb Length) Standard Series Backbores
#1 - For players who prefer a free blow with less resistance than the #2 backbore. Applications - Orchestral/Symphonic playing
#2 - This backbore offers the 'classic' feel that classical players have grown accustomed to. With just the right amount of resistance this backbore has a bold beautiful tone. Applications - Orchestral/Symphonic/Soloistic/Chamber playing
#3 - Offers great stability while retaining that 'classic' sound. Offers more resistance than the #2 without losing the beautiful tone. Applications - Chamber Orchestra/Jazz Combo/Soloistic playing
#4 - A compact, and focused sound without adding great resistance. This backbore blends well for big band section playing without producing that strident sound known for lead trumpet playing. The compact, and focused sound pair nicely for piccolo trumpet playing. Applications- Jazz Band/Jazz Combo/Piccolo Trumpet/Soloistic playing
Regular Length (Bb Length) 10 Series Backbores
These backbores have a more immediate increase in size after the throat for a more open feel.
10-2 (Similar to Wedge ML) - Our most popular classical backbore. The 10-2 creates a large sound without losing you with too much inefficient volume. This backbore offers that ‘classic’ backbore feel/blow that many have grown accustomed to. Applications - Orchestral/Symphonic/Soloistic/Chamber playing
10-3 (Similar to Wedge M) - This backbore offers slightly more resistance than the 10-2 without compromising the overall beautiful large sound. The attacks are more pronounced and speak quicker which creates a perfect mouthpiece for small group playing. Applications - Chamber Orchestra/Jazz Combo/ Soloistic playing
10-4 (Similar to Wedge S) - An extremely efficient backbore, offers a bright, focused sound. This backbore blends well for big band section playing without producing that strident sound known for lead trumpet playing. Applications- Jazz Band/Jazz Combo/Soloistic playing
Short Shank (C length) Backbore
OS - Designed for the orchestral player who desires that large/full sound that allows the player to use massive quantities of air without losing focus. Commonly used with #22-25 throats and deep cups. Pairs well with rotary trumpets. Applications - Orchestral/Symphonic playing
CS - Very free blowing symphonic backbore. The CS is a Symphonic short-shank backbore designed to help the intonation challenges associated with many C/D/Eflat trumpets. Applications - Orchestral/Symphonic/Soloistic/Chamber playing
Trumpet mouthpieces are available with two standard throat sizes. #27 (.144 inch) is the standard size for most mouthpieces and best choice for most players. #25 (.1495 inch) is a larger throat for more open blow. Choose a #25 throat if your mouthpiece feels stuffy with too much resistance and you are an advanced player with good breath support.