Bob Reeves Dynasonic 42

TrumpetIn Production

Precision Specifications

RIM DIAMETER16.3 mm

CUP DEPTHMedium

THROAT ∅3.66 mm

BACKBOREdynasonic

SHANKstandard

CUP SHAPEbowl

Rim Widthmedium

Rim Contourreeves

Throat Drill #—

Materialbrass

Finishsilver-plate

Weightheavy

Recommended For

All AroundCommercial

Special Features

Dynasonic Backbore
Heavyweight

About This Mouthpiece

The Bob Reeves Dynasonic 42 is a medium-cup Bb trumpet mouthpiece featuring a 16.3mm rim diameter and 3.66mm throat. It has a dynasonic backbore, standard shank. Well-suited for all-around and commercial playing. Notable features include dynasonic backbore, heavyweight.

View on Manufacturer Site →Bob Reeves ↗

Brand Deep Dive

Bob Reeves · BrassFit Science

Bob Reeves Guide

Screw-rim system, Reeves Sleeves gap adapter, and cup numbering decoded.

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Source Posture

BrassFit treats Bob Reeves pages as neutral reference pages. Exact dimensions above are the structured listing data for this model. If you spot a spec mismatch, missing variant, or outdated source page, send a correction before outreach so the cluster stays manufacturer-safe.

Submit a correction →Contact BrassFit →Manufacturer claim path →

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Rate This Piece — 8 Dimensions

Physical Feel

Resistance— Back-pressure & support

1 — Free-blowingRestrictive — 10

Rim Comfort— How kind is it on your chops?

1 — UncomfortableVery comfortable — 10

Rim Bite— Sharpness of the rim edge

1 — Very round / forgivingVery sharp / precise — 10

Tonal Character

Brightness— Overall spectral colour

1 — Dark & warmBright & piercing — 10

Tone Focus— Core vs. spread sound

1 — Spread / diffuseCentred / laser — 10

Playability

Articulation— Clarity & crispness of attack

1 — Blurry / sluggishCrisp & immediate — 10

Flexibility— Ease of slurs & pitch bending

1 — Rigid / stiffFluid & flexible — 10

Stamina

Endurance— How long before fatigue sets in?

1 — Tires quicklyPlays all night — 10

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