Audio-technica ATM350A User Manual

ATM350a

User Manual / Cardioid Condenser Instrument Microphone

Packages

ATM350U :

ATM350a, AT8490, AT8491U, AT8543, AT8468, hard shell carry case

ATM350UL :

ATM350a, AT8490L, AT8491U, AT8543, AT8468, hard shell carry case

ATM350PL :

ATM350a, AT8490L, AT8491P, AT8543, AT8468, hard shell carry case

ATM350W :

ATM350a, AT8490, AT8491W, AT8543, AT8468, hard shell carry case

ATM350D :

ATM350a, AT8490, AT8491D, AT8543, AT8468, hard shell carry case

ATM350UcW :

ATM350acW, AT8490, AT8491U, AT8468, hard shell carry case

Thank you for purchasing this product. Before using the product, read through the user manual to ensure that you
will use the product correctly. Please keep this manual for future reference.

Features

• Crisp, clear, well-balanced response, even at high SPLs

• Attaches to brass, reeds, piano, snare, toms and violin

• Dedicated mounting systems permit accurate positioning, provide
shock resistance and element protection

• AT8453 power module is equipped with switchable 80-Hz low-cut
filter to minimize pickup of undesired low-frequency sounds

• Interchangeable elements available for hypercardioid and
omnidirectional polar patterns

• Also available in a wireless model, ATM350acW

Caution

• Do not subject the product to strong impact to avoid malfunction.

• Do not disassemble, modify or attempt to repair the product.

• Do not handle the product with wet hands to avoid electric shock or
injury.

• Do not store the product under direct sunlight, near heating devices
or in a hot, humid or dusty place.

ATM350a Description

The ATM350a is a fixed-charge condenser microphone with a cardioid
polar pattern. It is designed for use in professional live-sound and
studio applications.

When used with the available mounts and mounting systems, it
provides accurate, consistent pickup of brass, woodwind, piano, drums
and many other musical instruments.

The flexible gooseneck allows for precise microphone positioning even
under demanding performances.

The cardioid polar pattern of the microphone is more sensitive to sound
originating directly in front of the element, making it useful for
controlling feedback and reducing pickup of unwanted sounds.

AT8491P Description

Piano mount features a strong rare-earth magnet which permits secure
mounting inside a piano or on any metal surface. The mounting base is
lined with soft and protective material to avoid damaging the
instrument.

AT8491W Description

The woodwind mount features an adjustable hook and loop fastener
strap with rubber pad to firmly secure the mount to the instrument.
Specially designed mount minimizes contact with instrument to reduce
damping. Rotating gooseneck mount allows easy positioning of the
microphone.

AT8491D Description

The drum mount features a patent pending design which uses the drum
lug to securely mount the microphone while still allowing the drum to
be tuned. The gooseneck can be positioned vertically or horizontally for
optimal placement and a low profile appearance.

AT8490/AT8490L Description

The AT8490/AT8490L flexible gooseneck permits aiming the microphone
in any direction, while a cable strain relief reduces cable-transmitted
noise and cable damage. The integral windscreen entirely surrounds the
microphone with foam to isolate the microphone from noise transmitted
from the instrument and shield the element against accidental damage.

AT8468 Description

The violin mount fastens beneath the strings between the bridge and
the tailpiece to provide outstanding pickup of violin and other stringed
instruments.

Operation and Maintenance

The ATM350a requires 11V to 52V phantom power for operation.

The microphone includes a 4 m (13.1') permanently attached miniature
cable. Its free end connects to the provided AT8543 power module via a
locking 4-pin connector. The output of the power module is a 3-pin
XLRM- type connector.

A switch in the power module permits choice of flat response or
low-frequency roll-o (via integral 80-Hz high-pass filter) to help control
undesired ambient noise.

The microphone is enclosed in a rugged housing with a low reflectance
black finish.

ATM350acW Description

The microphone is also available in a wireless model, the ATM350acW.
The ATM350acW features a 1.4 m (55") miniature cable terminated with
a locking 4-pin connector for use with Audio-Technica UniPak®
body-pack transmitters. The ATM350acW specifications are identical to
those of the ATM350a (when using an AT8543 power module).
However, no power module is included with the ATM350acW, so there
is no low-cut function.

AT8491U Description

Universal clip-on mount features rugged metal construction to
withstand the rigor of stage use. The mount is lined with rubber to
provide secure mounting, shock resistance and instrument protection.
Specially designed mount minimizes contact with instrument. A locking
screw holds the mount securely in place.

Output is low impedance (Lo-Z) balanced. The signal appears across
Pins 2 and 3; Pin 1 is ground (shield). Output phase is “Pin 2 hot”—
positive acoustic pressure produces positive voltage at Pin 2.

To avoid phase cancellation and poor sound, all mic cables must be
wired consistently: Pin 1-to-Pin 1, etc.

The 80-Hz low-cut filter switch on the AT8543 power module makes it
easy to switch from flat frequency response to low frequency roll-o.
This minimizes pickup of undesired low frequency noise, such as from
air conditioning systems. To engage the high-pass filter, slide the switch
toward the “bent” line.

Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for extended periods. Extremely
high humidity should also be avoided.

Specifications

Element

Polar pattern

Frequency response
Low frequency roll-o*
Open circuit sensitivity

Impedance

Maximum input sound level

Dynamic range

Signal-to-noise ratio

Phantom power requirements

Switch*

Weight

Dimensions

Fixed-charge back plate, permanently polarized condenser
Cardioid
40 to 20,000 Hz
80 Hz, 12 dB/octave

-49 dB (3.5mV) (0dB=1V/Pa, 1 kHz)
200 ohms
159 dB SPL (1 kHz THD 1%)
130 dB (1 kHz at Max SPL)
65 dB (1 kHz at 1Pa, A-weighted)
11 to 52 V DC, 3.5 mA
Flat, roll-o
Microphone: 14.5 g (0.5 oz), Power module: 90 g (3.2 oz)
Microphone: 37.8 mm (1.49") long, 12.2 mm (0.48") diameter
Power module: 92 mm (3.62") long, 18.9 mm (0.74") diameter

Output connector

Cable(s)

Power module: Integral 3-pin XLRM-type

4.0 m (13.1') long (permanently attached to microphone), 3.2 mm (0.13")
diameter, 2-conductor shielded cable with HIROSE HR10-type connector

Optional interchangeable elements

Accessories

UE-O omnidirectional, UE-H hypercardioid
AT8543 power module, microphone instrument mount, AT8468 violin mount,
hard shell carry case

• Characteristic weighting measured when connected to an AT8543 power module.

• 1 Pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL

• For product improvement, the product is subject to modification without notice.
* Mounted on an AT8543 power module.

0˚

Polar pattern

330˚

300˚

30˚

60˚

Frequency response

50

10 0

270˚

20 0

240˚

210˚

40–20,000 Hz

50 0

1k

Frequency in Hertz

180˚

SCALE IS 5 DECIBELS PER DIVISION

2k

90˚

120˚

150˚

5k

10 k

20k

10 dB

LEGEND

200 Hz

1 kH z
5 kH z
8 kH z

Response
in dB

LEGEND

0°, 50 cm

Roll-o