Which has a bigger cup — Conn Imp. Precision 6 or GR Technologies 65SZ?

The GR Technologies 65SZ has a cup diameter of 16.50 mm / 0.6496 in compared to 16.41 mm / 0.6461 in on the Conn Imp. Precision 6 — a difference of 0.09 mm / 0.0035 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Conn Imp. Precision 6 and GR Technologies 65SZ?

Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.

Conn Imp. Precision 6 vs GR Technologies 65SZ

Name: GR Technologies 65SZ
Brand: GR Technologies

The GR Technologies 65SZ has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Conn Imp. Precision 6

• Trumpet

Lead

Finish—

Best suited for

📋Professional players

🎶Professional lead; small throat; narrow rim

Mouthpiece B

GR Technologies 65SZ

• Trumpet

Finish—

Which is better?

Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.

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Conn Imp. Precision 6 vs GR Technologies 65SZ

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