Bach Backbore Question

[Def Trumpet]

I play a 3c and it was suggested to me to try a smaller backbore.

So -- to go from a 27 to a 24.

I have no experience with doing this sort of thing. What would the specific designation for that piece be?

Is that a 3C with a 7 backbore?
_________________
'50s Martin Committee M Bore
NY Bach Strad 42
MV Bach Strad 37
ACB 3CS

[crzytptman]

Never heard of either of those. Stock backbore on a 3C is #10. If you go Kanstul, you could try #76 or #41 for Bach, as well as SB, SA, S72 (Schilke), among many others. Their 3C top is a scan of a famous LA players favorite mouthpiece.
_________________
Crazy Nate - Fine Yet Mellow Fellow
"so full of it I don't know where to start"
Horn: "just mismatched Kanstul spare parts"
- TH member and advertiser (name withheld)

[dr_trumpet]

[Chuckledoo]

[Def Trumpet]

Well, the person said try a Bach 3C with a 24 backbore?

I know he meant smaller and not bigger...so whatever that means.
_________________
'50s Martin Committee M Bore
NY Bach Strad 42
MV Bach Strad 37
ACB 3CS

[shofarguy]

The linked page is too cool! I've never seen the Back Bore Comparator before. The differences look small, but I can tell you, they don't feel small.

Back bore changes slotting, "width" of tone, and harmonic equalization. It will also determine response in various registers and change (or emphasize) intonation characteristics. All the differences are subtle, but finding the right back bore for your horn and type of play is gratifying.

Throat size will alter the resistance curve of the horn, adjusting the blow. It also acts like a volume control for the horn, increasing or decreasing the amount of sound for a given amount of lung pressure.

There is some debate as to the concept of "efficiency". Some like the added resistance of a small throat and find that it helps the upper register. I find that a larger throat helps me to reach that part of my range more easily.

The most efficient set up I've played to date is my friends newly restored CG Benge coupled with my CG Personal mouthpiece. This is a supremely open combination, but the horn speaks with so little effort that it takes remarkably little amounts of pressure and airflow to play the thing and fill the room.

The CG Benge has a .468" bore and the CG Personal uses a back bore similar to the Bach 3 (very open) with a throat size equivalent to a #21.5!

This is about finding a balance to match your technique and facilitate your ability. The "magic" sollution to your present limitations is sound coaching accompanied by dilligent practice.

Brian
_________________
Brian A. Douglas

Flip Oakes Wild Thing Bb Trumpet in copper
Flip Oakes Wild Thing Flugelhorn in copper


There is one reason that I practice: to be ready at the downbeat when the final trumpet sounds.

[Richard A]

[KanstulBrass]

[Nonsense Eliminator]

[Jerry]

[John Mohan]

Hi Charles,

Is there any chance of you guys getting the Claude Gordon Personal Backbore up on your backbore comparator? I'd sure like to see how it compares to the Back 24 with something other than my famous 45 year old backbore-measuring pencil... (I'm referring to the pencil from my Grandfather's desk that has an advertisement on it for a business that's been gone for more than 40 years).

Best wishes,

John Mohan

[lburrows]

[Def Trumpet]

Person who gave me the advice must be wrong or not giving clear advice.

He wants me to go smaller not larger.

This has to do with issues I'm having with a martin committee I got restored. Low register notes (D and Db, sometime Eb) are coming out with a split tone effect.
_________________
'50s Martin Committee M Bore
NY Bach Strad 42
MV Bach Strad 37
ACB 3CS

[Chuckledoo]

[KanstulBrass]

[Nonsense Eliminator]

[lburrows]