Samson CM15P Bedienungsanleitung

AUDIO

CM15P

CM20P

Miniature Cardioid GooseneCk

PodiuM MiCroPhones

Printed February. 2007 v1.1

Samson Technologies Corp.

45 Gilpin Avenue

Hauppauge, New York 11788

Phone: 1-800-3-SAMSON (1-800-372-6766)

Fax: 631-784-2201

www.samsontech.com

Table Of Contents

Introduction 1

CM15P and CM20P Features 2

Using the CM15P and CM20P 3-4

Powering the CM15P and CM20P 3

Microphone Placement and Positioning 3-4

CM15P and CM20P Polar Pattern 5

CM15P and CM20P Frequency Response 6

CM15P and CM20P Specifications 7

Introduction

Thank you for purchasing the CM15P or CM20P podium microphone from Samson Audio! The CM15 and CM20P miniature

gooseneck microphones are 15" and 20" in overall length respectively, and the goosenecks are flexible at the top and bottom

with a mid-section stiffener for a straight profile. They feature a permanently charged condenser element with a Cardioid

(uni-directional) pick-up pattern, providing good off axis response while maintaining high feedback rejection. The CM15

and CM20 microphones are fitted with a standard 3-pin male XLR connector at their base for easy installation on standard

female XLR connectors or cables. An onboard High-pass filter, at 100Hz, is included, allowing the low frequency response to

be attenuated which helps remove background noise, stage rumble and mechanical noise, which can sometimes be trans-

mitted by the speaker at a podium. The microphones operate on standard 9 through 52 volts phantom power supply. Each

microphone includes a standard and shock-mounted flange for easy installation. A dual-stage, rippled windscreen is also

provided to greatly reduce annoying P-popping. The microphone elements are protected by rugged metal housings and the

entire microphone is finished in a low reflectance, matte black finish.

Should your CM15P and CM20P Podium Microphone ever require servicing, a Return Authorization number (RA) must be

obtained before shipping your unit to Samson. Without this number, the unit will not be accepted. Please call Samson at

1-800-3SAMSON (1-800-372-6766) for a Return Authorization number prior to shipping your unit. Please retain the original

packing material and, if possible, return the CM15P and CM20P in its original carton and packing materials.

CM15P and CM20P Features

The Samson CM15P and CM20P utilize state-of-the-art microphone technology and are engineered to the finest detail.

Here are some of their main features:

• CM20P: 20" overall length; CM15P" 15" overall length

• Flexible gooseneck top and bottom, rigid mid-section

• Internal selectable Hi-pass filter

• Standard XLR connector

• FMS1 Standard Flange-mount included

• WS15 Multistage windscreen included

• 9 – 52 Volt Phantom Power Operation

Powering the CM15P and CM20P

The CM15P and CM20P are condenser microphones and therefore need to be operated by connecting a phantom

power supply. Phantom power is standard on most quality mixers. If necessary, an external phantom supply, like

the Samson S phantom, can also be used. The CM15P and CM20P receive the phantom power directly from a mic

connector or cable when connected to a mixer that includes a phantom supply. The power is sent OUT of the micro-

phone INPUT, riding silently along with the audio signal. Most mixers have a switch to engage the phantom power,

so be sure to check that the phantom power is on.

Microphone Placement and Positioning

The CM15P and CM20P have been designed to be placed on a podium or table top and connected to a standard XLR

connector. In order to reduce the occurances of "p-popping", always use the supplied windscreen. Since the CM15P and

CM20P have a uni-direction pick-up pattern, be sure to position the microphone towards the sound you want to pick

up, and away from sound you do not want to pick up. In order to maximize the sound quality, you must pay careful

attention to the placement of your CM15P and CM20P and how it is positioned for the instrument or vocalist that you

are miking. All microphones, especially uni-directional or cardioid

Using the CM15P and CM20P

Microphone Placement and Positioning - continued

microphones, exhibit a phenomenon known as “proximity effect.”Very simply put, proximity effect is a resulting change

in the frequency response of a microphone based on the position of the mic capsule relative to the sound source.

Generally, you will get a bass boost when miking in close. When you point a cardioid mic directly at the sound source

(on axis) you will get the best frequency response, however, when you start pointing the microphone slightly away (off

axis) you will notice the low frequency response dropping off and the microphone will start to sound thinner.

Using the CM15P and CM20P

CM15P and CM20P Polar Pattern

Every microphone has a characteristic polar pattern that determines how well it accepts or rejects signal coming from

various areas around the microphone. For example, omnidirectional mics accept all signals regardless of where those

signals originate (in front of the mic, behind it, to the side, etc.).

In contrast, directional cardioid mics are specifically designed to accept mostly signal coming from directly in front,

and to reject signal coming from behind or from the side. The cardioid pattern is utilized by the CM15P and CM20P (as

shown in the illustration below). For this reason, the CM15P and CM20P excel in envi-

ronments where there is a good deal of unwanted ambient sound—it delivers those

signals originating directly in front of the mic capsule itself while rejecting those that

originate from behind.

The polar pattern also determines how prone a particular mic is to inducing feedback.

Feedback is that characteristic nasty howling sound that occurs when a mic is placed

too close to a loudspeaker—the signal from the loudspeaker is fed into the mic, then

into the loudspeaker, then into the mic, over and over again until an oscillating tone

is generated. Because the cardioid pattern utilized by the CM15P and CM20P is so

good at rejecting signal coming from the rear of the mic, you’ll find that use of the

CM15P and CM20P greatly minimizes feedback problems.

CM15P and CM20P Frequency Response

CM15P and CM20P Specifications

Specifications

Element Type Fixed-charge condenser

Polar Pattern Cardioid (Uni-directional)

Frequency response 60 - 16000Hz

Sensitivity -40dB/Pa

Rated impedance 600 ohms

SPL 127dB

Dynamic range 103dB

S/N ratio 70dB

Power Supply 9~52V phantom supply

Power consumption 4mA

Andere Handbücher für CM15P

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