Clearance 5MM Compression Throat
All Clearance Compression Throats are the pre-smooth version.
These offer more front end to the attack. Great for lead or situations where the attack is more important.
"C" - bright and loud with a balance of depth and ease in upper register
"CS" - smooth version of C
"E" - extremely bright and loud, easiest in upper register
"ES" - smooth version of E
"H" - aids in upper register while remaining big and full
"HS" - smooth version of H
The 5MM Throat regulates air flow and is a major factor in the harmonic overtone color produced by our 5MM Modular Mouthpiece System.
Most standard mouthpieces have throat measurements in the range of .145 to .165 with an end diameter of .20 to .22 inches. A 3C is typically .147 by .21 inches and is designated as F147.21 as in the example illustration above.
Not sure which size throat you need? Call us and we'll make recommendations based on your specific performing needs. 303.657.2747
Please allow up to 6 weeks for delivery in standard sizes and 12 weeks for custom sizes (all compression options, smaller than .145 or larger than .170)
Understanding Size options
HT Size - this letter + 5-digit number is derived from the Cup Size, Throat ID (inside diameter) and the Exit Diameter
Throat ID - measured at the smallest inside diameter, the vast majority of standard OEM mouthpieces range from .135 to .160
Exit ID - end diameter that mates with the Backbore (hundredths of an inch)
Cup Depth - Throat Length Letter must match Cup Depth Letter
Shape - Last letter sometimes used at end as in "C.147.20H" (see more on Throat Shapes below)
Drill Size - other manufacturers use the 1857 wire gage standard, Harrelson mouthpieces use actual inch dimensions
B-120-20 designates the smallest diameter of .120" and an end diameter of .200" (matches Cup B, this is a small throat suitable for lead work)
F-145-21 designates the smallest diameter of .145" and an end diameter of .210" (matches Cup F, this is a medium throat suitable for all around playing)
H-170-22 designates the smallest diameter of .170" and an end diameter of .220" (matches Cup H, great for ballads and Mahler's 5th symphony)
We recommend experimenting with throats of various sizes to achieve your desired tone color for each performing situation. Smaller diameter values produce a more focused tone while medium sizes offer vibrancy and warmth and large throats minimize projection producing a pleasant cello-like velvet tone. You may experiment with any diameter variations listed as they are all regular stock items. Change Throat sizes in seconds and see for yourself how this one factor will help you fine tune air flow, color, projection and intonation.
Throat "length" letter should match the Cup "depth" letter
Throat "exit diameter" should match the Backbore "entrance diameter"