Operation and Maintenance
The
MB
1000 is available in low- and high-impedance versions.
In both versions, the 3-pin microphone output connector mates
with XLRF-type cable connectors.
In the low-impedance
MB
1000
L
, the Lo-Z balanced signal
appears across Pins 2 and 3, while the ground (shield) connec-
tion is Pin 1. Output is phased so that positive acoustic pressure
produces positive voltage at Pin 2 in accordance with industry
convention.
In the high-impedance
MB
1000
H
, the Hi-Z unbalanced output
requires the use of a cable with XLRF-type to
1
/
4
" phone plug
connectors. Pin 2 connection is to the
1
/
4
" phone plug tip, and
Pins 3 and 1 connect to ground. As with all high-impedance
microphones, the use of cables longer than 20' is not recom-
mended, since the added cable capacitance will create
unacceptable high frequency losses and greater possibility
of hum and noise pickup.
These Midnight Blues microphones utilize 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 flathead screwdriver, rotate the small
screw in the center of the switch 90 degrees (
1
/
4
turn)
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 temper-
atures 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.
Description
The
MB
1000 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
1000 is designed specifically for close-up vocal and
instrumental use. A special internal shock mount system mini-
mizes 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
1000 is useful in reducing
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 micro-
phone mixers, tape recorders, and other electronic inputs. The
MB
1000 is capable of undistorted output even in very intense
sound fields.
Enclosed in a rugged die-cast housing, the
MB
1000 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.
MB
1000
L
.
MB
1000
H
Neodymium Dynamic
Cardioid Microphones
O N
O N
O N
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
