Astatic CTM 44 User Manual

CTM 44

Industrial Audio Products

Description

The ASTATIC CTM 44 is a dynamic cardioid microphone featuring the sound
quality and characteristics demanded by the professional but priced for the budget
conscious installer or musician. The CTM 44 provides the performance and
features to satisfy today’s most demanding professionals.

The wide and flat frequency response of the CTM 44 provides unsurpassed
natural transparent sound quality. The cardioid pickup pattern minimizes annoying
feedback (when used close to sound reinforcement speakers and monitors) and
reduces the pickup of unwanted off-axis sounds. An effective internal multistage
pop filter minimizes wind and breath noise.

The CTM 44 has a Flex-Form™ hardened steel grille screen that dramatically
resists deformation while greatly reducing any risk of adverse performance caused
by a bent or dented ball screen. This unique ability to retain its original shape
assures that the CTM 44 will maintain its attractive appearance.

The CTM 44 uses a high energy neodymium magnet.

The low-frequency response of the CTM 44 may be enhanced by increasing or
decreasing the distance from the sound source. This phenomenon is technically
known as “proximity effect”. Nominal or “flat” response is generated at a distance
of 24 inches or more. However, as the distance to the sound source decreases,
the bass sensitivity increases, providing a solid, robust character. The CTM 44
includes an on/off switch and is supplied complete with a zippered vinyl protective
pouch and a snap-in microphone swivel-mount.

DYNAMIC CARDIOID MICROPHONE

ASTATIC Quality

All CTM 44 microphones are audio tested and inspected prior to shipment.
Our absolute commitment to quality insures that ASTATIC microphones
remain the Best V alue in today's competitive industry .

Operation and Maintenance

The CTM 44 is one of the finest values in sound reinforcement and
recording microphones available. Although it is incredibly durable, it should
be stored in the zippered pouch provided to protect it from dust and dirt
when not in use.

If the front screen becomes soiled by dirt or residue, it may be cleaned
using the following procedure. Unscrew the front screen assembly and
remove the inside foam windscreen. W ash the foam windscreen using a
mild detergent, and let dry thoroughly . Follow the same method for the
grille screen. T o clean the mike housing, use a cloth dampened with isopropyl
alcohol.

Specifications

Generating Element:

Moving Coil Dynamic, Neodymium Magnet

Polar Pattern:

Unidirectional (Cardioid)

Frequency Response:

80 Hz - 15 kHz

Output Level:

Power Level:

-54 dB (0 dB = 1 mW per 10 microbars)

Open Circuit Voltage:

-70 dB (0 dB = 1 volt per microbar)

3.2 mV/Pascal

Impedance:

600 ohms

Phasing

Positive Pressure on Diaphragm generates a positive voltage on pin
2 relative to pin 3

Switch:

Low profile

Grille Screen:

Woven Flex-Form™ (hardened steel)

Case:

Die Cast Zinc Alloy

Finish:

Durable rubber textured Gunmetal black

Dimensions:

(See drawing on other side)

SPECIFICA TIONS FOR CTM 44

@ 1 kHz

Architects’ and Engineers’ Specification

The microphone shall be a dynamic cardioid type, low impedance with a wide
range of frequency response, uniform from 80 to 15,000 Hz having an on/off
switch. Output level at 1 kHz shall be - 54 dB (0 dB = 1mW/10 microbars). The
polar response shall show a minimum of -15 dB at 180 degrees between 150 and
4 kHz. The woven steel screen, when attached to the microphone, shall withstand
a drop of 6 feet to a wooden floor without deformation. The microphone case
shall be die-cast zinc alloy. The microphone shall have a length of 6-3/4" ±1/32"
and a maximum diameter of 1-1/8" ±1/64". The microphone shall be finished in a
rubber textured non-reflecting black. A snap-in clamp and zippered vinyl protective
pouch shall be supplied.

The ASTATIC Model CTM 44 is specified.

TWO-YEAR LIMITED W ARRANTY

Omnitronics, LLC (“ASTATIC”) hereby warrants that this product will be free of defects in material and workmanship for a period of two years
from the date of purchase. In the unlikely event a defect occurs AST ATIC will, at its option, either repair or replace with a new unit of equal or
greater value. You should retain proof of purchase to validate the purchase date and return it with any warranty claim. Return warranty claims
carefully packed, insured and prepaid to the Service Department at the address listed below.

This warranty excludes exterior finish or appearance, damage from abuse, misuse of the product, use contrary to ASTATIC’s instructions or
unauthorized repair. All implied warranties or merchantability or fitness for a particular purpose are hereby disclaimed and ASTATIC hereby
disclaims liability for incidental, special or consequential damages resulting from the use or unavailability of this product.

This warranty gives you specific legal rights and you may also have other rights which vary from state to state. Some states do not allow the
exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above exclusions and
limitations may not apply to you.

Note: No other warranty, written or oral is authorized by Omnitronics, LLC.

46873-20-00 / Rev. 12-23-03