General Rules for Microphone USE, Specifications

MODELS BG1.1 AND BG1.1K

UNIDIRECTIONAL DYNAMIC MICROPHONE

The Shure BG1.1 is a reliable, multi-purpose micro- phone designed to perform in a variety of live music, sound reinforcement, and basic recording applications. Its dy- namic cartridge features a smooth frequency response and a neodymium magnet for a high output level, while its cardioid pattern ensures high gain-before-feedback, and excellent isolation from undesired sound sources. The BG1.1's shock-mounting system, rugged cartridge construction, dent resistant steel ball grille, and sturdy die- cast handle allow the BG1.1 to maintain its performance through even the roughest environments. Typical applica- tions for the BG1.1 include close-up vocals, instrument pickup, public address, and Karaoke.

GENERAL RULES FOR MICROPHONE USE

1.For optimal signal-to-noise ratio, place the microphone as close as practical to the desired sound source.

2.For the best gain-before-feedback and isolation from undesired background noise, aim the microphone to- ward the sound source and away from undesired sound sources (see Figure [1]). The BG1.1 features a cardioid polar pattern which is most sensitive to sound directly in front of the microphone, and least sensitive to sound directly behind the microphone.

3.For the purest reproduction of sound, use no more than one microphone per sound source and use the fewest number of microphones necessary for the application.

4.For maximum isolation, keep the distance between mi- crophones at least three times the distance from each source to its microphone.

5.Work close to the microphone for extra bass response (see Figure [2]). This phenomenon is known as proxim- ity effect and can be used to achieve a fuller sound, es- pecially for vocals during soft passages where extra emphasis is needed. For instruments, proximity effect can be used to change bass output without using tone controls.

6.Placing the microphone too close to acoustically reflec- tive (smooth, hard) surfaces will result in a poor frequen- cy response and will increase the chances for feed back. To minimize this effect, place microphones as far as possible from acoustically reflective surfaces.

7.Add an external windscreen when using the micro- phone outdoors to reduce wind noise. The A58WS windscreen is available in 7 different colors.

8.Do not cover any part of the grille with your hand (see Figure [3]). Covering the grille alters the sound and dis- torts the polar pattern, increasing the chances for feed- back.

9.It is important to keep foreign particles out of the grille and the windscreen because they may alter the fre- quency response of the microphone. The grille may be periodically cleaned using warm, soapy water. Rinse with plain water and let it dry before replacing.

English: Print 1-2, 5

SPECIFICATIONS

Type

Dynamic

Frequency Response

85 to 14,000 Hz (see Figure [2])

Polar Pattern

Cardioid (unidirectional), symmetrical about axis (see Figure [4])

Output Impedance

Microphone Rated impedance is 150 Ω (180 Ω actual) for microphone inputs rated 75 to 300 Ω

Output Level (at 1,000 Hz)
Open Circuit Voltage*	. . . ± 76.5 dB ( .15 mV)
Power Level**	. . . . . . . . . . ±55.5 dB
*0 dB = 1 V/μbar	**0 dB = 1 mW/10 μbar

Polarity

Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of the microphone out- put connector

Environmental Conditions

This microphone will operate over a temperature range of ±29 to 57o C (±20 to 135o F), and at relative humidity of 0 to 95%.

Switch

Built in On/Off switch

Connector

3-pin male XLR connector designed to mate with Can- non XL series, Switchcraft A3 (Q.G.) series, or equiva- lent

Case

Die cast zinc handle, black matte finish, dent-resistant wire- mesh steel ball grille

Dimensions

See Figure [5]

Net Weight

290 g (10.2 oz)

Certification

Conforms to European Union directives, eligible to bear CE marking; meets European Union EMC Immu- nity Requirements (EN 50 082±1, 1992); RF radiated (IEC 801±3); ESD (IEC 801±2); EFT (IEC 801±4)

FURNISHED ACCESSORIES

Storage Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26A13 Break-Resistant Swivel Adapter . . . . . . . . . . . . . . . A25C 4.57 m (15 ft.) XLR to 1/4-in. cable

(BG1.1K only) . . . . . . . . . . . . . . . . . . . . . . . . . . . C15HZ

OPTIONAL ACCESSORIES

Shock StopperTM Isolation Mount . . . . . . . . . . . . . . A55M Windscreen (7 colors available) . . . . . . . A58WS Series 7.6 m (25 ft) Cable (XLR to XLR) . . . . . . . . . . . . . . C25J

REPLACEMENT PARTS

Dent-Resistant Grille Assembly . . . . . . . . . . . . . RK349G Cartridge Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . R186

The BG1.1 is backed by the Shure 2-year warranty. For service or parts information, please contact the Shure Service department at 1±800±516±2525. Outside the United States, please contact your authorized Shure Ser- vice Center.