Audio Technica 50 Series User manual

50 series microphones
AT5045
Studio Instrument Microphone
Features
• Audio-Technica’s premier studio condenser instrument microphone
• Pure, realistic sound quality for overheads, percussion, acoustic
guitar, strings and other acoustic instruments
• Side-address stick-design microphone with more diaphragm surface
area than most traditional large diaphragm side-address
microphones
• Discrete components carefully selected for optimized capsule
performance
• Transformer-coupled output is optimized to provide sonic character
• Exceptionally low noise with high-SPL capability
• Hand assembled and inspected for 100% quality control
• Advanced internal shock mounting decouples the capsule from the
microphone body
• Elegant, durable housing of aluminum and brass
• Innovative isolation clamp provides secure mounting, versatile
positioning and effective dampening of unwanted mechanical noise.
• Custom hard-shell carrying case with die-cut foam compartments
offers protection for one or two microphones
Description
The AT5045 is a large-diaphragm electret side-address condenser
instrument microphone with a cardioid polar pattern. It is engineered to
meet the most critical acoustic requirements of professional recording.
Its large-diaphragm characteristics and fast transient response make it an
ideal instrument microphone, designed specically for use on overheads,
percussion, acoustic guitar, strings and other acoustic instruments in
professional live-sound and studio applications.
The microphone requires 48V phantom power for operation.
The cardioid polar pattern of the microphone is more sensitive to sound
originating directly in front of the element, making it useful in controlling
feedback, reducing pickup of unwanted sounds and providing isolation
between performers.
The AT5045 features a large, rectangular element, carefully engineered to
improve transient response and increase response bandwidth. The two-
micron-thick, vapor-deposited gold diaphragm has been aged to achieve
optimum sonic characteristics that will remain constant over years of use.
The output of the microphone is a 3-pin XLRM-type connector.
The microphone is enclosed in a rugged housing. The included AT8481
isolation clamp permits mounting on any microphone stand with 5/8"-27
threads. An AT8165 windscreen and a custom hard-shell carrying case are
also included.
Operation & Maintenance
The AT5045 requires 48V phantom power for operation. 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.
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.
How to use the AT8481 isolation clamp
Before placing the microphone into the AT8481 isolation clamp, make
certain that the locking mechanism on the top of the clamp is in the
unlocked position.
Insert the AT5045 into the clamp’s front opening with the microphone’s
Audio-Technica logo facing outward and the microphone body vertically
centered in the clamp. Firmly press the AT5045 inward until you hear a click
and the microphone feels snug in the clamp. Finally, secure the microphone
by turning the lever on the top of the clamp to the locked position.
To remove, turn the lever on the top of the clamp to the unlocked position,
then pull the AT5045 directly outward. A slight twisting motion can aid in
removing the microphone from the clamp.
Architect’s and Engineer’s Specications
The microphone shall be a large-diaphragm, side-address, xed-charge
condenser. It shall have a cardioid polar pattern with a uniform 120° angle
of acceptance and a frequency response of 20 Hz to 20,000 Hz. The
microphone shall operate from an external 48V DC phantom power source.
It shall be capable of handling sound input levels up to 149 dB with a
dynamic range of 141 dB. Nominal open-circuit output voltage shall be 17.7
mV at 1V, 1 Pascal. Output shall be low impedance balanced (100 ohms).
The output of the microphone shall be a 3-pin XLRM-type connector.
The microphone shall be 177.0 mm (6.97") long and have a maximum body
diameter of 25.0 mm (0.98"). Weight shall be 197 g (7.0 oz). The microphone
shall include an isolation clamp, a windscreen and a protective carrying case.
The Audio-Technica AT5045 is specied.

AT5045
Specications
Fixed-charge back plate, permanently
polarized condenser
Cardioid
20 – 20,000 Hz
–35 dB (17.7 mV) re 1V at 1 Pa
100 ohms
149 dB SPL, 1 kHz at 1% T.H.D.
8 dB SPL
141 dB, 1 kHz at Max SPL
86 dB, 1 kHz at 1 Pa
48V DC, 1.4 mA typical
197 g (7.0 oz)
177.0 mm (6.97'') long, 25.0 mm (0.98'')
maximum body diameter
Integral 3-pin XLRM-type
R11
AT8481 isolation clamp for 5/8"-27
threaded stands; AT8165 windscreen;
protective carrying case
Element
Polar pattern
Frequency response
Open circuit sensitivity
Impedance
Maximum input sound level
Noise1
Dynamic range (typical)
Signal-to-noise ratio1
Phantom power requirements
Weight
Dimensions
Output connector
Audio-Technica case style
Accessories furnished
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
1Typical, A-weighted, using Audio Precision System One.
Specications are subject to change without notice.
Audio-Technica Corporation
audio-technica.com ©2014 Audio-Technica 0001-0300-01
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
SCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚ 0˚
150˚
120˚
90˚
30˚
60˚
12" or more on axis
LEGEND
Frequency in Hertz
Response in dB
10 dB
100
50 200 10k 5k
1k
500 2k 20k
frequency response: 20– 20,000 Hz
polar pattern