User Manual

BOre
Trombone bores are a
measurement of the inside
diameter of the inner slide tubes.
As the bore size changes so
does the bell design. The shape
of the tapered surface, or rate of
are, determines the
characteristic sound of the
instrument. Slow tapers yield
bright tones, while
fast tapers produce dark,
warm sounds. Smaller bore
trombones, having bells with
slower rates of taper, produce a
brighter jazz sound. Larger bore
trombones, having bells with
faster rates of taper, yield darker
symphonic tone qualities.
BellS
Bach Stradivarius trombones are famous for their fullness of
sound and projection. This is achieved by the use of one-
piece construction, allowing for unrestricted vibration of the
bell. In addition to the shape of the bell are (rate of taper), the
type and thickness of the bell material also affect the sound.
Gold brass, softer and more red than the standard yellow
brass due to a higher copper content (85% as opposed
to 70%), results in a warm tone.
Sterling Plus® bells (99.9% pure
silver, seamless construction)
create a full compliment of
partials (overtones) in the tonal
spectrum for a focused sound
with great projection. For
situations involving dark qualities
or high dynamic levels without
distortion, choose a heavyweight
bell (in either yellow or gold
brass).
mOuThpipeS And
gOOSeneCkS
The venturi (constriction) and
rate of taper in the mouthpipe
affect the trombone’s
characteristic sound. Bach offers
several mouthpipe options. Removable and interchangeable
mouthpipes for 42 series large bore tenor trombones:
standard – balanced resistance, focused sound; standard
length/open venturi – less resistance, more exible; long
length/open venturi – very free blowing. Removable and
interchangeable mouthpipes for Bach bass trombones:
standard – balanced resistance, focused sound; short length/
open venturi – less resistance, more exible; mouthpiece
holder only – most free blowing.
The gooseneck, a section of pipe located immediately
after the handslide section, serves as a “choke” to further
balance the blowing resistance. The model LT16M features
a more open gooseneck (i.e., less constriction), creating less
resistance and more exibility. The optional open gooseneck
for the 42 series tenor trombones also results in a
more open instrument.
Yellow brass is standard (pictured left). Gold brass (pictured
right), softer and more red due to a higher copper content,
results in a warmsound. Sterling Plus (99.9% pure silver,
pictured center) offers a focused sound with projection.
Bells with fast tapers (solid line) produce dark, warm sounds. Slow
tapers (dotted line) yield a bright tone.
For more information, please visit, www.bachbrass.com | 10
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