Audio Technica Midnight Blues MB3000L Handbuch
Operation and Maintenance
Output of the
MB
3000
L
is low impedance balanced. The profes-
sional 3-pin microphone output connector mates with XLRF-type
cable connectors. The balanced signal appears across Pins 2
and 3, while the ground (shield) connection is Pin 1. Output is
phased so that positive acoustic pressure produces positive
voltage at Pin 2 in accordance with industry convention.
The MB
3000
L
utilizes a MagnaLock on/off switch. This specially-
designed switch operates silently and may be locked in the “on”
position to prevent accidental turn-off during use. To lock, slide
the switch up into the “on” position (Fig. 1a). Using a small flat-
head screwdriver, rotate the small screw in the center of the
switch 90 degrees (1/4turn)
counter-clockwise
(Fig. 1b).
Never
force the screw.
When the screw slot position is horizontal
(“across” the microphone body), the switch is locked. To unlock
the switch, turn the screw 90 degrees
clockwise
until the screw
slot position is again vertical (in line with the microphone body).
Never try to turn the switch more than 90 degrees or
1
/
4
rotation.
The switch may only be locked in the “on” position. Do not try
to turn the screw when the switch is in the “off” position.
While every effort has been made to provide an extremely
rugged microphone, reasonable care should be taken to avoid
abuse. The microphone can withstand a wide range of tempera-
tures and humidity without damage. Take care to keep foreign
particles from entering the windscreen. If the microphone is
exposed to an environment with small iron or steel filings
(on a workbench, for example) these fine metal particles can
accumulate on the diaphragm, reducing low-frequency response.
Excessive accumulation of dirt on the windscreen will reduce
high-frequency response.
MB3000L
Neodymium Dynamic
Cardioid Microphone
ONONON
OFF
Fig. 1a Fig. 1b Fig.1c Fig. 1d
Do
not
try
Do
not
turn to lock switch
Unlocked Locked screw clockwise in the “off”
Position Position to lock position
Description
The
MB
3000
L
is a wide-range moving coil dynamic mic with
a cardioid pickup pattern. It features a high-output neodymium
magnet for maximum performance with all equipment.
The
MB
3000
L
is specifically designed for use in high-quality
recording and sound reinforcement applications to meet the
needs of professional musicians and sound engineers.
Extended frequency response, high sensitivity and extremely
fast transient response meet the demands of high-quality vocal
and instrumental pickup.
A special internal shock mount system minimizes handling and
case noise. The microphone also features the MagnaLock™
on/off switch for silent operation. The switch may be locked in
the “on” position to prevent accidental turn-off during use.
The cardioid pickup pattern of the
MB
3000
L
is useful in reduc-
ing unwanted background noise and controlling feedback,
especially when used extremely close. Miking instruments or
vocalists at very close range also effectively reduces “leakage”
from one performer to the next. Low-frequency noise is also
reduced by a low-frequency roll-off of sounds more than one
foot distant from the microphone.
The high-output neodymium design and low-mass diaphragm
and voice coil assure excellent signal-to-noise ratios with
microphone mixers, tape recorders, and other electronic inputs.
The
MB
3000
L
is capable of undistorted output even in very
intense sound fields.
Enclosed in a rugged die-cast housing, the
MB
3000
L
features
a special, baked-on “Midnight Blues” finish. In addition to
being attractive and comfortable to hold, this special finish
further reduces handling noise and increases durability.
A multi-stage windscreen reduces wind noise and “popping”
when performers work extremely close. The included micro-
phone clamp permits mounting on any microphone stand with
5/8"-27 threads. A foam-lined carrying case is provided to protect
the microphone during transport and storage.
MB3000L
SPECIFICATIONS
†
Element Neodymium Dynamic
Polar Pattern Cardioid (Unidirectional)
Frequency Response 50-16,000 Hz
Open Circuit Sensitivity 2.5 mV (–52 dBV) at 1 Pa*
Impedance 250 ohms
Switch MagnaLock™on/off
Weight (less clamp) 12.0 oz (340 grams)
Dimensions 7.10" (180.3 mm) long, 2.16" (54.9 mm)
head diameter, 1.38" to .87" (35.0 mm
to 22.0 mm) tapered body diameter
Output Connector Integral 3-pin XLRM-type
Accessories Furnished Tapered slip-in stand clamp for
5/8"-27 threaded stands;
protective foam carrying case
†In the interest of standards development, A.T.U.S.
offers full details on its test methods to other industry
professionals on request.
* 1 Pascal = 10 dynes/cm2= 10 microbars = 94 dB SPL
Frequency Response
1 kHz
LEGEND
SCALE IS 5 DECIBELS PER DIVISION
90
60
120
30
150
210
240
270
300
330
180
0
Polar Pattern
XLRM-type Plug Wiring
Low Impedance Balanced
1
/4" Phone Plug Wiring
Low Impedance Unbalanced
RED WIRE
TIP SLEEVE SHIELD
WHITE WIRE
Midnight Blues
®
Frequency in Hertz
Response in dB
10 dB
20k
10k
5k
2k
1k
500
200100
50
LEGEND 12" or more on axis
OPTIONAL ACCESSORIES
MBC
15
H
15' 2-conductor, shielded,
vinyl-jacketed cable with XLRF-type
connector at microphone end, 1/4" phone
plug at equipment end.
MBC
15
L
15' 2-conductor, shielded,
vinyl-jacketed cable with XLRF-type
connector at microphone end, XLRM-type
connector at equipment end.
AT
8114 foam windscreen (slip-on).
CP
8201 line matching transformer
(Lo-Z to 50,000 ohms).
AT
8202 adjustable in-line attenuator for
use with balanced Lo-Z microphones.
AT
8312 2-conductor, shielded,
vinyl-jacketed, broadcast-type cable
with XLRF-type connector at microphone
end, 1/4" phone plug at equipment end.
Available in 10', 20' & 25' lengths.
AT
8314 2-conductor, shielded,
vinyl-jacketed, broadcast-type cable with
XLRF-type connector at microphone end,
XLRM-type connector at equipment end.
Available in 10', 20', 25', 30', 50' & 100'
lengths.
AT
8407 universal “clothes-pin” clamp fits
both tapered and cylindrical microphones.
AT
8410a shock mount for boom or stand
operation. Universal “clothes-pin
”
clamp
fits tapered and cylindrical microphones.
AT
8415 low-profile shock mount for
boom or stand operation.
One-Year Limited Warranty
Audio-Technica microphones and accessories purchased
in the U.S.A. are warranted for one year from date of
purchase by Audio-Technica U.S., Inc. (A.T.U.S.) to be free
of defects in materials and workmanship. In event of such
defect, product will be repaired promptly without charge
or, at our option, replaced with a new product of equal
or superior value if delivered to A.T.U.S. or an authorized
service center prepaid, together with the sales slip or other
proof of purchase date.
Prior approval from A.T.U.S.
is required for return.
This warranty excludes defects due
to normal wear, abuse, shipping damage, or failure to use
product in accordance with instructions. This warranty
is void in the event of unauthorized repair or modification.
For return approval and shipping information,
contact
the Service Department, Audio-Technica U.S., Inc., 1221
Commerce Drive, Stow, Ohio 44224.
Except to the extent precluded by applicable state law,
A.T.U.S. will have no liability for any consequential, inci-
dental, or special damages; any warranty of merchantability
or fitness for particular purpose expires when this warranty
expires.
This warranty gives you specific legal rights, and you may
have other rights which vary from state to state.
Outside the U.S.A., please contact your local dealer for
warranty details.
Audio-Techinca U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
Form No. 0323-9403-02 © 1996 Audio-Technica U.S., Inc. Printed in U.S.A.
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