Shure MX690 Microflex Wireless Boundary Microphone

The U841A delivers exceptionally intelligible audio reproduction in a super-compact, low-profile design. Equipped with UniGuard® RFI-shielding technology, this omnidirectional condenser boundary microphone is designed for clear, highly intelligible sound reinforcement, professional recording, television and conferencing in surface-mount applications. The U841A has a 360° pickup angle and operates on battery or phantom power.

• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• UniSteep® filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality
• Small-diameter UniPoint® capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• Heavy die-cast case and silicon foam bottom pad minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance black finish for minimum visibility
• Operates on battery or phantom power

• Element: Fixed-charge back plate permanently polarized condenser
• Polar Pattern: Omnidirectional in hemisphere above mounting surface
• Frequency Response: 30-20,000 Hz
• Low Frequency Roll Off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity: Phantom: -39 dB (11.2 mV) re 1V at 1 Pa Battery: -40 dB (10.0 mV) re 1V at 1 Pa
• Impedance: Phantom: 200 ohms Battery: 270 ohms
• Maximum Input Sound Level: Phantom: 132 dB, 1 kHz at 1% T.H.D. Battery: 122 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range: Phantom: 111 dB, 1 kHz at Max SPL Battery: 101 dB, 1 kHz at Max SPL
• Signal to Noise Ratio: 73 dB, 1 kHz at 1 Pa
• Phantom Power Requiremens: 11-52V DC, 2 mA typical
• Battery Type: 1.5V AA/UM3
• Battery Current Life: 0.4 mA / 1200 hours typical (alkaline)
• Switch: Off, on-flat, on-roll-off
• Cable: 25.0' (7.6 m) long (permanently attached to microphone), 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F-type connector
• Accessories: AT8531 power module; battery; soft protective pouch

Designed to deliver easy, flexible control in conference and boardroom installations, the versatile U891Rx cardioid condenser boundary microphone features a touch-sensitive on-off switch that can be set to three modes: press-on/press-off, press to talk, and press to mute. The phantom-powered microphone is equipped with a unique PivotPoint® rotating output connector and an LED status indicator. UniGuard® innovations offer unsurpassed immunity from radio frequency interference; interchangeable elements are available in cardioid, hypercardioid and omnidirectional polar patterns; an 80 Hz low-cut UniSteep® filter reduces pickup of low-frequency ambient noise. The microphone's heavy die-cast case and silicon foam bottom pads minimize coupling of surface vibration to the microphone. The unit's self-contained electronics eliminate the need for an external power module.

• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Half-cardioid (cardioid in hemisphere above mounting surface)
• Frequency Response: 30-20,000 Hz
• Low Frequency Roll Off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity: 34 dB (19.9 mV) re 1V at 1 Pa
• Impedance: 200 ohms
• Maximum Input Sound Level: 130 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range: 104 dB, 1 kHz at Max SPL
• Signal to Noise Ratio: 68 dB, 1 kHz at 1 Pa
• Phantom Power Requirements: 11-52V DC, 4 mA typical
• Weight: 264 g
• Dimensions: 108.0 mm long, 84.0 mm maximum width, 23.0 mm height
• Output Connector: TB3M-type
• Cable: 7.6 m long, 3.2 mm diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors

• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
• Ultra-quiet electronic switch can be set to any of three operating modes: "touch-on/ touch-off," "touch-to-talk" and "touch-to-mute“
• PivotPoint® rotating output connector allows cable to exit from either the rear or the bottom of the microphone
• Superior off-axis rejection for maximum gain before feedback
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• Small-diameter UniPoint® capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance finish for minimum visibility
• Available in two colors: black (U891Rx) and white (U891RWx)

    Designed for Broadcast, House of Worship, Pro Music, and other applications.
    Half-cardioid polar pattern
    Boundary layer
    Ultra-thin profile (16 mm) housing
    Rubber non-slip bottom pad and strong steel screen
    Integrated pop filter

Case Material    Die cast zinc
Connector Type    3-pin XLR
Element    Back Electret Condenser
Finish    Non-reflecting Black
Finish    White
Impedance, Low-Z balanced    200 Ω
Mic Type    Boundary
Open Circuit Voltage    25 mV/Pascal
Polar Pattern    Cardioid
Wired/Wireless    Wired
Height    16 mm (0.63“)
Width    94 mm (3.7“)
Depth    123 mm (4.84“)
Weight Net    12.63 oz (358 g)

The half-cardioid e 901 is the perfect condenser microphone for kick drum. It is highly robust and step-resistant. It benefits from an integrated preamp.

Pick-up pattern : half-cardioid
Frequency response : 20...20 000 Hz
Sensitivity in free field, no load : (1kHz) 0,5 mV/Pa
Max. Sound pressure level (aktiv) : 154 dB / SPL
Phantom powering : 48 V / 1,1 mA
Nominal impedance : Min. terminating impedance : 1000 Ohm
Dimensions : 126,5 x 105 x 26,5 mm
Weight : ca. 550 g