Name: GR Technologies 65S
Brand: GR Technologies

Question 1

What is the difference between Bob Reeves RP5 and GR Technologies 65S?

Accepted Answer

The GR Technologies 65S has a wider cup diameter.

Question 2

Which has a bigger cup — Bob Reeves RP5 or GR Technologies 65S?

Accepted Answer

The GR Technologies 65S has a cup diameter of 16.50 mm / 0.6496 in compared to 16.47 mm / 0.6484 in on the Bob Reeves RP5 — a difference of 0.03 mm / 0.0012 in. A wider cup generally produces a fuller, darker tone but requires more air support.

Question 3

How does cup depth compare between Bob Reeves RP5 and GR Technologies 65S?

Accepted Answer

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

Question 4

Which is better, Bob Reeves RP5 or GR Technologies 65S?

Accepted Answer

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.

Bob Reeves RP5 vs GR Technologies 65S

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