C-Ducer CP2x8
Stereo Phantom Powered c-ducer system with 2 x 8" (20cm) C-ducer Tape Microphone.
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CPS/8 - USA
Stereo Phantom Powered c-ducer system
with 2 x 8" (20cm) C-ducer Tape
Microphone.
APPLICATIONS
Piano
Keyboard
Effects
Harp
SPECIFICATIONS
Output Impedance
Output Type
Frequency Response
Output voltage (max)
S/N ratio
Distortion
Power
600 Ohms
XLR type balanced
25Hz to 50KHz
1.5V
83 dB/A
Less than 0.05%
DIN 45596 48V
Phantom only
KIT INCLUDES
2 x microphones, 2 x Pre amps, 1 x Spare reel Hi Low Tape, 1 x reel Hi
Tac, 2 x Pre Amp Clips, 1 x Manual
Site Map
USA : Home
INSTRUMENTS : Guitar Group | Banjo | Piano | Small Keyboard | Bass and Cello | Violin | Harp | Drums | Percussion | Other Users
PRODUCTS: CPM/3 | | CPM2/3 | CPM2/8 | CPS/3 | CPS/8 | CPS3/p | CPS8/p | B1000/3CPM/8 | B1000/8 | B2000/8 | LP2/3 | LP2/8 | Phantom Power| CDS
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http://www.c-ducer.com/us/us_cps_8.htm [2007/10/31 下午 04:10:33]
Percussion
Sound Effects: C-ducer is a very useful tool in the sound effects
department. It is easily stuck to a creaky door, floorboards (for
picking-up footsteps), a typewriter or virtually anything that makes a
sound.
Under Water: C-ducer makes an excellent hydrophone. It does
however, require a waterproof coating or sheath if prolonged
immersion is anticipated.
C-ducer CP Series
USER HANDBOOK
Industrial & Mechanical Vibration: The sound emitted by worn
bearings in an engine or gear train can be readily detected by attaching
the C-ducer to the engine block or transmission case. Where excessive
heat prevents direct contact, C-ducer can be wrapped around a rod or
screwdriver, the end of which is pressed against the block or case. An
industrial preamplifier is available for use when frequency response
beyond that of audio is required.
Electric Instruments: An interesting and appealing sound can be
obtained by putting a C-ducer on the headstock of a guitar or electric
bass. This sound can then be mixed with the signal from the electric
pickups if desired. Parts of the body on electric instruments also
frequently produce appealing sounds. Using this acoustic signal for
one half of a stereo sound can be very interesting.
LIMITED WARRANTY
This product is warranted for one year from the date of original purchase against defects
in workmanship and materials. At the option of the distributor or manufacturer, parts
that prove defective will either be repaired or replaced or the whole product will be
replaced. The manufacturer and distributor(s) accept no responsibility for incidental or
consequential loss or damage from any cause whatsoever.
CONTENTS
PAGE
1
Principle of operation, the C-ducer preamplifier
2
Care of your C-ducer, the C-ducer cable
Service: Warranty and non-warranty service may be obtained from
your authorised C-ducer distributor or national service centre.
3
C-ducer adhesive tape - IMPORTANT NOTES
Distributor
4
Acoustic stringed instruments
5
Piano & Harp
6
Drums & Percussion
7
Other Applications, Warranty & Service Information
7
UK
Audio Marketing Group
2 High Street
HASLEMERE
GU27 2LY
Tel: (01428) 658775
Fax: (01428) 658438
Email: sales@c-ducer.com
www.c-ducer.com
USA
C-T Audio Systems Inc
119 High Shoals Ln.
Stateville
NC 28677
(828) 963 8629
APPLICATION NOTES
The C-ducer tape
The C-ducer (Capacitive-trans-ducer) is a contact condenser
microphone. It is light in weight so as to minimize interference with
the vibration of the instrument to which it is attached, and it has a
phenomenal dynamic range (the transducer itself has a dynamic
capability of >155dB) and can handle the amplitudes within a bass
drum without distortion. The frequency response of the transducer is
an incredible 0.1Hz to 1MHz, although this is deliberately restricted
within the preamplifier to minimize induced noise and interference.
Two lengths of C-ducer tape are available, 3" (7.5cm) and 8" (20cm).
The shorter length is suitable for smaller instruments (violin, folk
harp, banjo etc), and the longer tape is designed for other acoustic
stringed instruments (double-bass, ,cello, acoustic guitar etc), drums
and piano.
There are two C-ducer systems for use on piano and they both use two
tapes; one has a mono output (the CP2/8), and the other has stereo
outputs (CPS/8). The tapes are applied in exactly the same position on
the piano in both cases (see Page 5).
The C-ducer Preamplifier
The C-ducer CP System uses a low-noise preamplifier which has been
integrated within the XLR-type connector. The output from this
connector is suited to any standard 600 ohm balanced, microphonelevel input and is wired with:
Pin 1 - Ground
Pin 2 - Signal
Pin 3 - Return
predominantly bass notes, and the tape beneath the treble string
bridge will carry mainly treble notes. In all cases mount the tapes
between the soundboard struts and start experimentation from a
position of around 18" (45cm) in from the edge of the soundboard. If
an unnatural degree of treble 'bite' is required interesting effects can
be obtained by mounting one of the tapes directly onto the metal harp
on the inside of the piano.
Adhesive cable clips should be used if problems are found attaching
the tapes securely, since the plastic moulding at the cable end of the
tape must not be allowed to rattle or move and should be flat against
the soundboard. Under no circumstances should any kind of tape be
applied to the outer (brown) surface of the C-ducer tape.
Drums & Percussion: There is a complete range of C-ducer systems
for drums and percussion, including the C-ducer Drum Wizard which
incorporates MIDI and Trigger outputs as well as balanced and
unbalanced audio. Detailed information is available within a separate
Application Note for these uses.
Latin Percussion: The Cducer CPS/8 produces
excellent results when used on
Latin drums such as Bongos
and Congas.
POSITION FOR BONGOS
POSITION FOR CONGAS
It is also possible to connect the output from the phantom-power
supply unbalanced by using Pin 2 (live) and Pin 1 (Ground) leaving Pin
3 disconnected.
Note: The C-ducer CP Series should not be powered with anything
other than a DIN45596 48V phantom-power supply.
1
TIMBALES
6
Two tape positions are
suitable: wrapped inside the
lower rim of the drum
(particularly suited to Congas
and Timbales) or wrapped
around the outer, upper rim
(particularly recommended
for use on Bongos).
Experimentation is
recommended for optimum
performance.
Harp: Two tapes are used on harp, CP2 for
Mono or CPS for Stereo use. Two 3" (8cm) tapes
should be used on smaller harps (ie CP2/3 or
CPS/3) and two 8" (20cm) tapes on concert harp
(ie CP2/8 or CPS/8). Attach tapes in positions
shown, parallel and close to the strings.
Important: Where the harp is decorated with
gold leaf or similar decoration, great care
should be taken to protect the finish before
applying the C-ducer (see Page 3). Where the
Stereo C-ducer system is used (CPS/8 or CPS/3)
it will be found that the lower tape responds
predominantly to the bass strings and the higher
tape to the treble.
Acoustic Keyboards require
two C-ducer tapes for
ADHESIVE CABLE CLIPS
maximum performance. The
smaller members of the family
18"
(45cm)
(Celeste, Clavicord etc)
BRIDGES
require two 3" (8cm) tapes and
others use two 8" (20cm) tapes.
Where Stereo is desired, the
CPS system should be used (ie
18"
(45cm)
CPS/3 or CPS/8). Tapes should
be attached in the positions
shown in the diagrams;
VIEW FROM UNDERNEATH
experimentation is
BRIDGES
recommended for optimum
results, however, it has been
found that best results are
generally obtained mounting
the tapes directly under the
bridges and between the ribs.
When the stereo C-ducer is
CABLE CLIPS
used (CPS), the tape under the
bass
string bridge will carry
VIEW FROM THE BACK
Care of your C-ducer
C-ducer is a rugged instrument; however, certain precautions should
be taken to ensure the many years of trouble-free use it has been
designed to give:
• The C-ducer should never be punctured or cut.
• Although the C-ducer is designed to be splashproof, it should not be
deliberately immersed.
• Do not expose your C-ducer to heat (above normal room
temperatures) or leave it in direct sunlight.
• The C-ducer should only be powered by a 48V phantom power
supply that conforms to DIN 45596.
• The C-ducer should only be attached to the instrument using
adhesives outline on page 3.
• If it is necessary to reduce the cable length of the C-ducer, the
instructions in the following section should be noted:
5
2
Reducing the C-ducer Cable Length
The length of the C-ducer cable is suitable for virtually all applications.
However, it is permissible to reduce this cable length (for instance, to
insert an in-line connector) if the following precautions are taken.
The C-ducer cable has been designed for low-noise and lowinterference and includes an additional ground shield. This takes the
form of a black conductive plastic layer between the outer ground
braid and the clear inner insulator. If the cable is shortened this black
layer must be stripped right back to the ground braid (so it is at least
¼" (6mm) back from the signal conductor).
Conductor
Insulation
Conductive Plastic Ground Shield
Copper Braid
Outer Insulation
If you wish to insert a miniature in-line connector in the cable it is
important to use fully shielded (metal) connectors for this purpose,
since hum and noise may result from not doing so (talk to your
dealer/distributor if you are in doubt).
Attaching your C-ducer
Your C-ducer CP System contains a spare reel of C-ducer doublesided adhesive tape. When the adhesive on the surface of your Cducer no longer has adequate adhesion to stick to the instrument,
gently remove the old adhesive layer and replace with a new piece. It
may also be necessary to replace the adhesive foam pad that is
originally supplied to prevent the small plastic joining block between
the C-ducer tape and the cable from falling off the instrument. If this
happens, distortion and noise may result. Further supplies of adhesive
tape and pads are available from your C-ducer dealer.
Note: It is the User's responsibility to ensure that the surface of the
instrument will not be damaged by the C-ducer adhesive. While every
care has been taken to design this adhesive so as not to cause damage
to the surface of an instrument, Audio Marketing Group and its
distributors accept no responsibility for such damage, and strongly
recommend that you gently test the adhesive on a small area of the
instrument that is not normally visible prior to mounting the C-ducer
in its final position.
Delicate surfaces can sometimes be protected by first applying a piece
of “Clingwrap” or “Clingfilm” type material to the surface of the
instrument before attaching the C-ducer tape. There are also various
types of low-adhesive plastic films available from most book stores and
hardware stores that may be suitable. In all cases gently apply the
material to a discreet part of the instrument before applying it in the final
position.
In some cases (when attached to the underside of a piano, for
example) the weight of the cable may tend to pull the C-ducer tape off
the instrument despite the adhesive foam pad. The use of adhesivebacked cable clip as a strain-relief solves this problem.
Note: The C-ducer should not be covered with duct tape, gaffers tape
or similar. The surface of the C-ducer that is not stuck to the
instrument should be allowed to breathe.
3
APPLICATION NOTES
Remove the protective backing from the C-ducer tape and carefully
attach it to your instrument in the position shown. Attach the C-ducer
lightly at first, this will enable you to experiment with the exact
position that best suits your instrument, ear and sound equipment.
Experimentation around the approximate position shown is the key to
getting the perfect sound for you.
STRINGED INSTRUMENTS
POSITION 2
POSITION 1
Guitar: Two positions are shown,
position 1 has been found suitable
for larger, more resonant
instruments or when enhanced bass
is desired. Position 2 provides a
natural balance on Classical and
Spanish-style instruments. In both
cases the tape should be mounted
close and parallel to the bridge.
,
Violin, Cello and Bass: Position the
tape over the sound post initially and
move it in small increments until the
desired sound is found. On Bass and
’Cello (particularly those
instruments of heavier construction)
success can sometimes also be found
with the C-ducer mounted near the fholes.
Banjo: Depending on the type of
instrument and the style of play, the
C-ducer can either be mounted with
the adhesive foam pad stuck to the
rim and just the tape portion
attached to the skin. When
percussive effects are used (ie
tapping the skin) the position of the
tape will alter the level of the effect.
4
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