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K-300

Wireless microphone

K-300
K-300
K-300
K-300
K-300
K-300
K-300

The industry's first patented automatic human hand sensing technology

  • The Audio K-300 wireless microphone features the industry's first patented automatic hand-sensing technology, delivering flawless performance in capturing sonic details. Its superior dynamic tracking capability ensures effortless pickup at both near and far distances, while the built-in howling suppression circuit simplifies tuning.


Main Features

  • Frequency range: 640-690MHz
  • Adjustable channels: 100×2
  • Oscillation method: Phase-locked loop frequency synthesis (PLL)
  • Frequency stability: ±10ppm
  • Reception method: Superheterodyne double conversion
  • Receiving sensitivity: -95~-67dBm
  • Audio frequency response: 40-18000Hz
  • Harmonic distortion: ≤0.5%
  • Signal-to-noise ratio: ≥110dB

Product Description

  • Industry-first patented automatic hand-sensing technology. The microphone automatically mutes within 3 seconds after leaving the hand and remaining stationary (regardless of placement direction or angle), enters energy-saving standby mode after 5 minutes, and automatically shuts down after 15 minutes while completely cutting off power. Features drop-to-mute functionality. It is a brand-new intelligent and automated wireless microphone concept.
  • A brand-new audio circuit architecture delivers crisp highs, powerful mid-lows, and exceptional detail reproduction. Superior dynamic tracking ensures seamless pickup at varying distances.
  • Innovative digital pilot tone technology eliminates cross-channel interference in KTV rooms—no more frequency clashes!
  • Equipped with feedback suppression circuitry for easier tuning.
  • Auto-scanning for interference-free channels enables hassle-free installation.
  • The host unit allows flexible usage count settings.
  • Frequency band: Phase-locked loop (PLL) frequency synthesis.
  • 100*2 channels with 250kHz spacing.
  • Superheterodyne dual-conversion design ensures ultra-high receiving sensitivity.
  • RF section adopts multi-stage high-performance dielectric filters for excellent anti-interference capability.
  • The first intermediate frequency (IF) uses a SAW filter, while the second IF employs a triple ceramic filter, significantly enhancing anti-interference performance.
  • Specially designed mute circuit eliminates popping noise during microphone power-on/off.
  • The microphone uses widely available AA batteries, offering 6–10 hours of continuous operation.
  • Unique voltage-boost design ensures consistent microphone performance even as battery power declines.
  • An operational range of up to 80 meters in ideal conditions, suitable for diverse demanding scenarios.
  • Default configuration includes an LCD screen with blue backlight and an aluminum alloy microphone body.
  • Adjustable transmission power and squelch threshold. The receiver's rear panel features an external squelch control knob, allowing flexible operational range settings between 10–80 meters.
  • Infrared auto-frequency synchronization enables quick pairing of the microphone to the receiver's working channel.
  • Dedicated KTV engineering model: two microphones, one host unit. Easily configurable for 100+ KTV rooms. Unique structural design ensures fast and simple maintenance.

Technical Specifications

Frequency Response: 640-690MHz
Tunable Channels: 100×2
Oscillation Method: Phase-Locked Loop (PLL) Frequency Synthesis
Frequency Stability: ±10ppm
Reception Method: Superheterodyne Double Conversion
Receiving Sensitivity: -95~-67dBm
Audio Frequency Response: 40-18000Hz
Harmonic Distortion: ≤0.5%
Signal-to-Noise Ratio: ≥110dB
Audio Output: Balanced Output and Mixed Output
Transmission Power: 3-30mW
Modulation Method: Frequency Modulation (FM)
Battery Specification: 2 AA Batteries
Power Supply Specification: 100-240V 50-60Hz 12VDC (Switching Power Adapter) or 220VAC/50-60Hz 12VDC (Linear Power Supply)
Power Consumption: ≤10W

Receiver Specifications

Chassis Specification: EIA Standard 1U
Channel Groups: Dual Channel
Frequency Stability: ±10PPM
Frequency Stability: ±10ppm
Frequency Range: 640 – 690MHz
Bandwidth: 50MHz
Modulation Method: FM
Receiving Sensitivity: -105dBm
Oscillation Method: PLL Phase-Locked Frequency Synthesis
Sensitivity: At 25KHz deviation, input 4dBμV, S/N > 60dB
Bandwidth: 50MHz
Maximum Deviation: ±45KHz
Comprehensive S/N Ratio: >110dB
Distortion: <1%
Comprehensive Frequency Response: 80Hz~18KHz (-3dB)
Power Supply: DC 12V / 1000mA
Weight: 3Kg
Dimensions: 420 (W) × 43 (H) × 206 (D) mm
Output Connectors: XLR Balanced and φ6.3 Unbalanced Jacks

Handheld Microphone Specifications

Frequency Range: 640 – 690MHz
Bandwidth: 50MHz
Frequency Stability: ±10PPM
Tunable Channels: 200CH
Audio Frequency Response: 80Hz-18KHz
Distortion: <1%
Oscillation Method: PLL Phase-Locked Frequency Synthesis
Harmonic Radiation: <-60dBC
Maximum Deviation: ±45KHz
Microphone Capsule: Dynamic, Cardioid Polar Pattern
RF Power Output: 10mW
Battery: AA × 2
Current Consumption: 120mA (Typical)
Battery Life: Approximately 8 Hours

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