The TM-90BM is a low-cost boundary condenser microphone designed for applications where multiple speakers or sound sources need to be picked up equally. It is ideal for personal broadcasting, amplifying conferences or plays, and capturing ambient noise.

Compared to multi-microphone setups, a boundary microphone offers several advantages, including higher sensitivity, less sound coloration, an unobtrusive appearance, and reduced "microphone anxiety" for users. To maximize the benefits of the boundary microphone principle and achieve rich sound, place this microphone on a large, hard surface such as a table, hardboard, or floor. The larger the surface, the better the low-frequency response.

Features:

• Ideal for personal broadcasting with two or more people
• Polar pattern: half supercardioid
• Unobtrusive design and color, only 24 mm high, perfect for video podcasts
• Frequency range optimized for speech
• Tolerates high sound pressure levels
• Depth contour switch on the bottom (cut/neutral/boost)
• Requires phantom power (DC 9-52 V)
• Special connection cable and carrying case included

Technical Specifications:

• Element: Back-electret condenser microphone
• Polar pattern: Semi supercardioid
• Frequency range: 50 Hz - 18 kHz
• Sensitivity: -35 dB ± 3 dB (0 dB = 1V/Pa at 1 kHz)
• Load impedance: > 1 kΩ
• Output impedance: 150 Ω
• Output connector: XLR, 3-pin, male (via supplied cable)
• External voltage spacing: 68 dB
• Maximum permissible sound pressure level: 140 dB (1 kHz, 1 % THD)
• Required phantom power: DC 9-52 V, 3 mA
• Weight: 260 g (without cable)
• Dimensions (W × H × D): 170 mm × 24 mm × 82 mm (without protruding parts).