CM20P - Microphone SAMSON - Free user manual and instructions

Product Type	Podium Microphone
Brand	Samson
Model	CM20P
Overall Length	20 inches (508 mm)
Element Type	Fixed-charge condenser
Polar Pattern	Cardioid (uni-directional)
Frequency Response	60 Hz - 16 kHz
Sensitivity	-40 dB/Pa
Rated Impedance	600 ohms
Maximum SPL	127 dB
Dynamic Range	103 dB
Signal-to-Noise Ratio	70 dB
Power Requirement	9 - 52 V phantom power
Power Consumption	4 mA
Connector	3-pin male XLR
High-pass Filter	Internal selectable at 100 Hz
Included Accessories	FMS1 Standard Flange-mount, WS15 Multistage windscreen
Finish	Matte black, low reflectance
Gooseneck Construction	Flexible at top and bottom, rigid mid-section
Application	Podium, tabletop

Frequently Asked Questions - CM20P SAMSON

How do I power the CM20P microphone?

The CM20P requires phantom power (9 to 52 V) from a mixer or external phantom supply. Ensure phantom power is enabled on your mixing console.

What is the polar pattern of the CM20P?

It has a cardioid (uni-directional) polar pattern, which picks up sound from the front and rejects sound from the rear and sides.

How do I reduce 'p-popping' when speaking?

Always use the supplied WS15 multistage windscreen to minimize plosive sounds.

What is the high-pass filter for?

The internal selectable high-pass filter at 100 Hz attenuates low-frequency noise such as stage rumble, mechanical vibrations, and background hum.

Can I use the CM20P with a standard XLR cable?

Yes, it has a standard 3-pin male XLR connector and can be plugged directly into any female XLR cable or connector.

How do I mount the CM20P?

The microphone includes a FMS1 standard flange-mount for installation on a podium or tabletop. A shock-mounted flange is also provided.

What is proximity effect and how does it affect the CM20P?

Proximity effect causes a bass boost when the microphone is close to the sound source. For a natural sound, maintain a moderate distance; moving closer adds low-end emphasis.

How do I clean the CM20P?

Wipe the exterior with a soft, dry cloth. Avoid using liquids or abrasive cleaners. Store in a dry, dust-free environment.

What should I do if I experience feedback?

Since the CM20P has a cardioid pattern, it rejects sound from the rear. Point the microphone away from speakers and avoid placing it directly in front of monitor speakers.

Where can I get replacement windscreens or flanges?

Contact Samson Technologies at 1-800-3-SAMSON or visit www.samsontech.com for authorized replacement parts.

USER MANUAL CM20P SAMSON

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

Copyright 2005 -2007, Samson Technologies Corp.

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: [phone]

www.samsontech.com

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 transmitted 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

Using the CM15P and CM20P

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 microphone 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 occurrences 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.

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 environments 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

Samson Technologies Corp. • 45 Gilpin Ave • Hauppauge, NY 11778

Phone: 1-800-3-SAMSON (1-800-372-6766) • Fax: [phone]

[e-mail] • www.samsontech.com