Vintage Detail

Bach Corp 12C

Tenor TromboneAlto Trombonepre-war · 1928–1961⚠ Unverified

Core Specs

Bore Size0.485" (12.32mm)

Shank Typesmall

Archive Context

Compatible With

0.485"0.500"

Confidencemedium

Confirmations0

Manufacturer Notes

Made by Bach Corporation, New York, before the Selmer acquisition in 1961. The New York-era 12C has a smaller bore than the later Mt. Vernon versions. Widely used on small bore tenor trombone and alto trombone.

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Forum Sources

https://www.trombonechat.com/threads/bach-new-york-bore-sizes

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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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