Josephson C720 Manual Download Page 7 | Manualshive

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Josephson C720 Manual Download Page 7

material

is

the

two

channels

from

the

mic

(mixed

during

the

session)

or

as

they

are

played

back

from

the

session

recording

–

the

signals

are

still

the

same.

But

while

you

are

getting

familiar

with

the

microphone’s

capabilities,

try

mixing

the

two

channels

live.

Try

some

of

the

experiments

described

here.

You’ll

need

an

ordinary

mixer

with

the

mic

plugged

in

to

two

channels.

Be

sure

the

gain

is

set

to

exactly

the

same

for

both

channels

and

the

EQ

set

to

bypass.

Of

course

the

simplest

pickup

is

just

to

use

the

front

signal

by

itself.

This

is

a

well

controlled

standard

cardioid

pattern

and

is

excellent

for

closeup

vocals,

detailed

instrument

pickup

and

large

ensemble

recording.

Note

how

the

sound

color

changes

as

you

move

around

the

microphone

–

more

proximity

effect

and

“reach”

for

sounds

arriving

from

the

front,

less

toward

the

sides,

and

a

sharp

null

directly

behind

the

mic.

Adding

some

of

the

rear

‐

facing

cardioid

signal

allows

the

standard

cardioid

pattern

to

be

adjusted

to

suit

the

pickup

requirements.

Try

some

experiments

with

your

pickup

in

a

reasonably

live

room,

so

you

can

hear

the

effect

of

your

adjustments

on

the

overall

pattern.

Adding

a

little

bit

of

the

rear

‐

facing

cardioid

(say,

at

‐

12

dB

relative

to

the

front)

will

reduce

the

depth

of

the

null

in

the

back

of

the

mic,

producing

a

sub

‐

or

wide

cardioid

pattern

–

less

directional

than

the

standard

cardioid,

and

with

a

greater

level

of

room

ambience.

Proximity

effect

is

reduced

too,

so

if

the

performer

is

moving

around

too

much

and

causing

tonal

shifts,

this

can

help

fix

it.

Listen

to

the

room

sound

become

a

little

more

live

and

the

overall

pickup

a

little

more

open

as

you

bring

up

the

level

of

the

rear

signal.

If

you

do

the

same

thing

but

with

the

rear

signal

inverted

in

phase,

the

result

becomes

more

directional

(up

to

a

point)

as

you

increase

the

inverted

‐

rear

signal.

In

this

case

the

null

toward

the

back

of

the

microphone

splits,

forming

a

null

to

either

side

of

180

degrees.

At

about

‐

12

dB

relative

to

the

front,

a

hypercardioid

pattern

is

formed,

with

nulls

at

about

140

and

220

degrees.

The

overall

rejection

of

reverberant

or

room

sound

is

highest

in

this

configuration,

even

though

the

null

to

the

rear

of

the

mic

is

not

as

deep

as

in

the

straight

cardioid

mode.

You’ll

notice

much

less

“room

tone”

and

a

greater

“reach”

with

the

mic

in

this

mode,

but

with

more

pronounced

low

frequency

proximity

effect.

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Summary of Contents for C720

Page 1: ......

Page 2: ...JOSEPHSON ENGINEERING Inc 329A Ingalls Street Santa Cruz California 95060 Tel 831 420 0888 Fax 831 420 0890 email info josephson com http www josephson com 2008 Josephson Engineering Inc ...

Page 3: ...l foam basket Unlike traditional microphone housings made of perforated metal or screen with reflective metal support structures this highly open material protects the capsule mechanically provides electrical shielding and some pop and wind screening no supporting structure is necessary A fine acoustically transparent screen inside the basket helps protect the capsule from breath moisture when the...

Page 4: ...ern or flip the phase of the rear facing signal and mix to make a figure 8 pattern Any intermediate pattern can be made by mixing the two signals in different proportions Use this chart as a starting point for your own experiments Pattern Rear Phase Front Gain Rear Gain Front Cardioid Normal 0 off Rear Cardioid Normal off 0 Subcardioid Normal 2 15 Omni Normal 3 3 Hypercardioid Invert 2 15 Figure 8...

Page 5: ...alf of the C720 has this directional pattern one is facing forward and the other faces to the rear If you mix the front and rear signals equally the result is an omnidirectional pattern sounds are picked up evenly from all directions If you mix the front and rear signals in different ratios the result is an omnidirectional type pattern but not perfectly even Mixing the rear signal at 6 dB versus t...

Page 6: ... from cardioid through the figure 8 end of the spectrum will have one or more nulls somewhere in the pattern and the direction and width of this dead zone make a big difference in the overall sound As you change patterns listen to how the overall room sound changes If you re working close to the microphone you ll also notice that the bass boost caused by proximity effect becomes stronger as you ch...

Page 7: ...ear the effect of your adjustments on the overall pattern Adding a little bit of the rear facing cardioid say at 12 dB relative to the front will reduce the depth of the null in the back of the mic producing a sub or wide cardioid pattern less directional than the standard cardioid and with a greater level of room ambience Proximity effect is reduced too so if the performer is moving around too mu...

Page 8: ...tput transformer which uses amorphous metallic glass as the magnetic core material The result is a much higher overload point even when the mic is driving long cables It is the same audio circuit and transformer found in Josephson s acclaimed e22S microphone The internal power supply of the C720 uses a new electrostatic circuit that provides capsule polarization charge without the use of oscillato...

Page 9: ...The breakout cable diagram is shown here for reference The C720 will operate properly with either front or back sides of the microphone connected or both Full P48 phantom power is required ...

Page 10: ... volts 5 mA per output Internal impedance 100 ohms Rated impedance 200 ohms Minimum load impedance 1k ohms Free field and rated sensitivity 1 7 mV Pa Frequency Range 20 20 000 Hz Directional characteristics 2x cardioid Overload sound pressure 136 dB SPL at 1000 Hz Equivalent sound pressure due to inherent noise 15 dB SPL A weighted rms in accordance with IEC 60268 1 ...

Page 11: ...uirements of the European Union directives as follows Machinery 93 68 EEC Exempt passive sensor Low Voltage 93 68 EEC Exempt passive sensor EMC 93 68 EEC Exempt passive sensor RoHS 2002 95 EEC Compliant for Hg Cd Cr6 PBB PBDE and Pb David Josephson CEO Josephson Engineering Inc 329A Ingalls St Santa Cruz CA 95060 USA ...

Page 12: ...y Josephson Engineering will at its option repair or replace any microphone that fails providing that it is returned to the factory prepaid and has not been abused or altered There are no user serviceable parts inside Josephson Engineering microphones Disassembling a Josephson microphone will void its warranty For service information please contact Josephson at 831 420 0888 Repair shipments may be...

Page 13: ......

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