Nady SPC-20 operating instructions

SPC-20 Condenser Microphone

USER GUIDE

Congratulations on purchasing the Nady SPC-20 Condenser Microphone! The SPC-20 is designed for the most critical live
sound and recording applications and is ideal for handheld vocal and mid-high frequency instrument miking.

UNPACKING, INSPECTION, STORAGE AND TRANSPORT

Your SPC-20 microphone was carefully packed at the factory, and the shipping carton was designed to protect the unit during
shipping. Please examine your microphone before using and retain the external shipping package for reuse should you ever
need to return your microphone for servicing. Afoam padded plastic carrying case is provided for safe, convenient transport and
storage.

STANDARD ITEMS SUPPLIED

OPTIONAL ACCESSORIES

• SPC-20 microphone

• User Guide

• Warranty card

• Mic clip

• Foam padded plastic carrying case

FEATURES

• Unique 2-layer ballscreen “pop” filter for elimination of breath
noises

• Pressure gradient back electret condenser and transformer­less FET circuitry for ultra transparency and enhanced tran­sient response

• Wide frequency response (50~16,000Hz) with specially tai­lored mid-high presence for vocal punch and exceptional
crisp, clear sound

• Supercardioid polar pattern for maximum feedback rejection

• Ultra-high (140dB) SPL capacity and wide 115dB dynamic
range for maximum freedom from distortion even in the most
demanding applications

• 4.5mV/Pa sensitivity, and 200 Ω rated impedance with
1000 Ω minimum load impedance

• Superior internal shockmounting to eliminate handling noise

• Lightweight, rugged and durable

• Required 48VDC phantom power

• SMSP-1 48V phantom power supply

To take full advantage of the superb features

of the SPC-10, and to enjoy long and

trouble-free use, please read this

User’s Guide carefully.

SERVICE

(U.S.) Should your Nady microphone require service, please contact the Nady Service Department via telephone at (510) 652- 2411 or e-mail at
[e-mail]. (INTERNATIONAL) For service, please contact the Nady distributor in your country through the dealer from whom
you purchased this product.

Note: Do not attempt to service this unit yourself as it will void your warranty.

SPC-20 SPECIFICATIONS

CARTRIDGE TYPE..........................................Back Electret Condenser

DIRECTIVITY PATTERN..................................Supercardioid polar pattern for optimum

feedback rejection

FREQUENCY RESPONSE..............................50 to 16,000Hz

SENSITIVITY

(@1kHz, 74dB S.P.L.)......................................-47dB V/Pa (4.5mV/Pa)

IMPEDANCE....................................................200Ω

MINIMUM LOAD IMPEDANCE ......................1,000Ω

MAXIMUM S.P.L. (THD ≤1% 1KHz)................140dB

DYNAMIC RANGE ..........................................115dB

CONNECTOR ..................................................3-pin XLR (gold plated)

POWER REQUIREMENT................................+48V phantom power, 2.7mA

MIC CABLE ....................................................3-pin XLR standard cable (not supplied)

DIMENSIONS ..................................................1.9” Diam. x 6.9” (48 Diam. x 175 mm)

WEIGHT ..........................................................9.3 oz (260 g)

MATERIAL ......................................................Die-cast zinc

BALLSCREEN ................................................Steel mesh

Specifications and design subject to change for improvement purposes without prior notice.

Date of purchase __________________________________________________________________________________________________________
Dealer’s Name ____________________________________________________________________________________________________________
Street____________________________________________________________________________________________________________________
City __________________________________________State ________________________Zip __________________________________________

08/27/01

USING YOUR SPC-20

The SPC-20 can be used with any standard mixer, powered
mixer/amplifier, or mic preamp. Using either an XLR to XLR or
XLR to 1/4” phone plug low impedance cable, connect the
female XLR end to the SPC-20 and the other end (male XLR
or 1/4” phone plug, as appropriate) to your equipment.

Depending on the application, the SPC-20 can either be
handheld or mounted on a microphone stand with a standard
mic clip.

Be aware of the proximity effect (an increase in bass
response) when the mic is placed close to the mouth or instru­ment. This may or may not be desirable. Experimenting with
the position of the mic with respect to the audio source will
ensure the optimum results you are seeking in any given
application. Also, never place your hand over the balIscreen of
the mic during use, as this can degrade the performance.

If the microphone is placed too near a speaker, an unpleas-

ant howling effect (acoustic feedback) may occur. Although all
microphones are prone to feedback to some extent, those
with a unidirectional polar pattern (such as the SPC-20) are
specially designed to accept only signals from the audio
source directly in front of the mic cartridge. Thus, the cardioid
pattern of the SPC-20 ensures that it will deliver only the
desired audio in front of the mic, rejecting the unwanted audio
from the rear, even in noisy ambient conditions with high
sound pressure levels from the PAand monitor speakers. This
means that feedback will be greatly minimized with the SPC­20 in all live performance miking applications.

Some useful ways in which to totally eliminate annoying
feedback include: experimenting with mic positions with
respect to the speakers, decreasing speaker volume (whenev­er possible), and adjusting the equalization of the mic audio
with the mixer.

PRECAUTIONS AND CARE OF YOUR SPC-20

• The microphone should never be dropped or subjected to
extreme shock. Store only in a padded case to protect it dur­ing transport.

• Keep the microphone away from extremely high tempera­tures (above 140°F or 60°C) and humidity. Avoid leaving the
microphone in direct sunlight for long periods of time.

• When using the microphone outdoors, avoid getting it wet.

• After use in a high-moisture application such as a stage per­formance, wipe off the microphone with a dry cloth and per­mit it to air dry. Do not store the unit in a closed space (e.g.,
a plastic bag) until all moisture has evaporated.

• To protect the mic cartridge and ensure the longest possible
useful life, it is highly recommended that for vocal applica­tions, an external foam windscreen be used over the ball
grille. This will prevent the buildup of saliva and perspiration
on the cartridge diaphragm, which degrades performance
and shortens the useful life of the microphone. Such a wind
“sock” will also eliminate wind noise when the mic is used in
a windy outdoor environment.

Capsule

Regulated power supply

Front Amplifier

Output Amplifier

Pins
XLR

Power Output

2 Output +

1 9~48V Phantom Power

3 Output

FREQUENCY RESPONSE POLAR PATTERN

SCHEMATIC