Product Description
Shure A15AS In-Line Switchable Attenuator between 15, 20, and 25dB, XLRF to XLRM
The Shure A15AS Switchable In-Line Attenuator reduces the level of any balanced microphone or line-level signal by 15, 20, or 25 dB. It is specially suited to reducing the level of a high-output microphone to prevent it from overloading the microphone input of a mixer or recorder in applications with high sound pressure levels. In addition, the A15AS may be used to reduce the level of a line-level mixer output to prevent overloading the aux-level input of a recorder. The A15AS is equipped with a female 3-pin XLR connector on the input side, and a male 3-pin XLR connector on the output side. Attenuation is controlled by a three-position slide switch. The A15AS allows phantom power to pass through from the mixer to the microphone, so it can be used with condenser microphones.
General Description
Use this balanced-line attenuator to prevent low-impedance microphones (rated at 150 or 600 ) and high-output condenser microphones from overloading low impedance inputs in high sound pressure level applications. The values of attenuation can be switch-selected for 15, 20, or 25 dB.
Use the A15AS with any low-impedance microphone, including phantom-powered condenser microphones, such as the Shure SM81. It can be used in-line between the microphone and its power supply. (This model is not suitable for use with the condenser powering system called “A-B Powering.”)
The A15AS attenuator bridges the microphone output and allows maximum signal handling with a minimum of loading caused distortion or reduction in clipping level.
Specifications
Frequency Response
20 to 20,000 Hz ±0.5 dB
Impedance
| Input | 1,000 Ω |
| Output | 150 Ω |
Attenuation Switch
Switch
15 dB, 20 dB, 25 dB
Housing
Full magnetic shield; steel with gray enamel finish
Dimensions
19 mm (.75 in.) diameter; 114 mm (4.5 in.) long
The equivalent single series simplex-powering resistance is 215 Ω; this resistance should be considered in addition to any existing circuit resistance when using the attenuator.
