Featuring a uniformly controlled cardioid pattern, the ADX51 is designed to capture the acoustics of your instrument being miked while isolating it from other instruments on stage. With a wide frequency range from 40Hz to 18kHz, the ADX51 features a 14mm gold vapor diaphragm, -10dB pad, and 150Hz bass roll-off filter, making it extremely easy to position. Manufactured to be durable, of high a standard, and tight tolerances. The ADX51 features a precision-machined brass body, durable black E-coat, steel mesh grill, and gold-plated XLR connector. ARCHITECT AND ENGINEER SPECIFICATIONS The microphone shall be a back plate pre-polarized condenser with a cardioid polar pattern. The microphone shall operate on 9-52 Volts phantom power and the nominal output impedance shall be equal to 100 ohms at 1 kHz. The microphone shall have switches for -10 dB pad and 150 hz bass roll-off filter and shall have a sensitivity of 17 mV / Pa at 1 kHz. The microphone shall have a maximum SPL level of 132 dB with a THD of 0.5%. The microphone shall be machined from brass with dimensions of 19.5 mm in diameter and 160 mm in length. OPERATION AND MAINTENANCE The ADX51 will NOT operate without phantom power voltage (48 Volts recommended) which is available on most professional mic preamps and mixing devices. If phantom power is not available on your equipment, use a phantom power supply such as the Audix APS2. Avoid plugging or unplugging the microphone from a PA system unless the channel is muted or the volume of the system is turned down. Failure to do so may result in a loud “popping” noise which could seriously damage the speakers in the PA system, studio monitors or headphones. Pad and Roll-Off: These recessed switches are located towards the middle of the mic. You will need either a miniature screw driver or a pen to move them down (engaged) or up (not engaged). Pad: The switch on the left side of the mic is a -10 dB pad. This means you can reduce the input level of the mic by 10 dB. This is very helpful for miking extremely loud instruments (guitars, drums, horns) that can drive the mic into distortion. Note that the feature is active when the switch is in the down position. Bass Roll-Off: This feature gently rolls off the bass frequencies starting at 150 Hz and below which is very helpful in reducing boominess for voice or instrument. Note that the feature is active when the switch is in the down position. USER TIPS The ADX51, an excellent choice to mic any kind of acoustic instrument, has a cardioid pick-up pattern which helps to eliminate sound from other instruments on stage from “bleeding” into the microphone. However, the ADX51 is much more sensitive than a dynamic mic and will pick-up sound from a greater distance. The acoustic nature of the instrument being miked along with how loud it is will determine how far the microphone should be from the sound source. For example, the ADX51 can be placed 1-2 feet above the cymbals of a drum kit and still pick up plenty of sound , whereas for a high-hat, the mic will need to be placed within 4-6 inches to be effective. Allow a distance of 2-3 feet between microphones to avoid phase issues. Applications

• Drum overheads, hi hat, cymbals
• Acoustic instruments
• Percussion table
• Group vocal, spoken word
• Ambient room miking
• Audience mics for in-ear monitors

Features

• Premium electret condenser microphone
• Smooth accurate frequency response
• Switches for -10 dB pad and bass roll-off
• Designed, assembled & tested in the USA
• 3 year warranty

Specifications

• Transducer Type: Pre-Polarized Condenser
• Frequency Response: 40 Hz - 18 kHz
• Polar Pattern: Cardioid
• Output Impedance: 100 ohms
• Sensitivity: 17 mV / Pa @ 1k
• Capsule Technology: Black Electret GV Diaphragm
• Off Axis Rejection: >15 dB
• Maximum SPL: 132 dB
• Power Requirements: 9-52 V Phantom
• Connector: 3-pin XLRm
• Polarity:
  • Positive pressure on diaphragm
  • produces positive voltage on
  • pin 2 relative to pin 3 of output
  • XLR connector
• Materials / Finish: Brass / Black Finish
• Product Weight: 184 g / 6.5 oz
• Product Length: 160 mm / 6.3 in

Supplied Accessories DCLIP - Heavy-duty nylon molded snap on clip P1 - Carrying pouch WS1C - External foam windscreen for reducing wind, sibilance and pop noise