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Polar pattern omnidirectional (hemispherical)
Frequency range 20 Hz to 20 kHz
Sensitivity 20 mV/Pa (-34 dBV)
Max. SPL 130 dB (for 1% THD)
Equivalent noise level (IEC 60268-4) 16 dB
Signal/noise ratio (A-weighted) 78 dB
Bass filter switchable flat or 150 Hz, 12 dB/octave
Impedance =2.000 ohms
Supply voltage 9 to 52 V phantom power to IEC 61938
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Type of Transmitter UHF Frequency Agile
Input Connector Internal fitting for interchangeable capsules
Type of Microphone Electret Condenser Boundary Microphone
Polar Pattern Cardioid (Supplied)
Interchangeable Mic Heads Yes - R183B Omnidirectional, R184B Supercardioid and R185B Cardioid cartridges available
Frequency Response 50Hz to 17kHz
Battery Type/Approx. Life 9 Volt Alkaline - 7 hours based on alkaline battery
# Of Channels Over 100 channels between 692-862MHz, depending on locale
Mute Switch Programmable Touch-Sensitive Switch
Level Control Gain Adjustment Range: -6 to 34dBs
Antenna Type Internal
Display Microphone Status & Battery Life LEDs
Dimensions 3.625 x 1.8 x 5.17 (92 x 46 x 131mm) (WxHxD)
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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)
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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) |
Boundary-layer Microphone
The LD Systems BM1 is an electret condenser microphone with a hemispherical directional characteristic.
For micing upright and grand pianos on stage or in the studio. Additional applications in the area of conference technology, transmission of roundtable discussions and theatrical performances.
Product type
Microphones
Type
Installations
Frequency response
50 - 20000 Hz
Directivity
half ball
Nominal impedance
250 Ohm(s)
Max. SPL (1% THD @ 1kHz)
135 dB
Phantom power requierements
48 V
Microphone input
XLR (3-pin)
Width
27 mm
Height
74.5 mm
Diameter
93.5 mm
Accessories (included)
cables (Mini-XLR / XLR, 6 m)
Weight
0,345 kg
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Condenser
Lightweight, sensitive diaphragm. Precisely and smoothly captures sound nuances. Powered by battery or phantom power supply.
Recommended Uses
Conference/Installed
The Microflex® Wireless Boundary Microphone offers total freedom of placement with no holes to drill or cables to run for installation.
The Wireless Boundary Microphone is the perfect solution for conference and meeting spaces where users demand flexibility and high performance. Compatible with Shure SLX® Wireless Systems.
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