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Alto RADIUS 200 UHF Wireless Handheld Microphone

Alto RADIUS 200 UHF Wireless Handheld Microphone
Alto RADIUS 200 UHF Wireless Handheld Microphone

Alto RADIUS 200 UHF Wireless Handheld Microphone

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Likely due to either replacement with a newer model or manufacturer discontinuation.
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Alto RADIUS 200 UHF Wireless Microphone

Wireless microphones hold the promise of freedom from restrictive cables and the ability to closely connect with your audience—whether that audience is a throng of concert attendees, an all-important business group or a crucial phone caller in an urgent situation. These are the times when rock-solid dependability matters above all else.

The Radius 200 utilizes Alto Professional’s most sophisticated diversity system, a cutting-edge system called True Diversity. Alto’s True Diversity receiver design is absolutely state-of-the-art. True Diversity system improves upon Radius 100’s Diversity system because it utilizes two separate receiver sections as well as two antenna systems. The unit constantly polls both receivers and the signals at the antennae, to instantly and seamlessly select the stronger signal. This is what “bulletproof” wireless microphone performance sounds like.


  • All-in-one, easy-to-use wireless microphone system for the most demanding professional vocal applications
  • Dual-antenna/dual-receiver True Diversity design for mission-critical, dropout-free operation
  • UHF band operation: 520 - 937.5MHz (regionally selected)
  • Receiver includes a high-visibility back-lit LCD display: Displays RF frequency and channel, AF and RF signal levels and other critical functions
  • Single-button scan feature for quickly identifying the optimal operating frequency
  • Sync function automatically synchronizes transmitter and receiver frequency
  • Squelch control for minimizing background noise during silent periods
  • Front-panel rotary volume control
  • Balanced XLR and unbalanced ¼-inch mic or line-level outputs


  • Receiver
    • UHF band operation: 520–937.5 MHz (region-specific)
    • Oscillator: PLL Synthesized
    • Frequency stability: ±0.005%
    • Modulation: FM
    • Transmission range: 328' / 100 m
    • Signal-to-noise ratio: > 100 dB (at 20 KHz deviation and 60 dBμV antenna input
    • Image & spurious rejection: 80 dB minimum
    • Receiving sensitivity: At 2 uV over 52 dB/A SNR
    • Selectivity: > 50 dB
    • AF response: 80 Hz – 18 KHz
    • THD: < 1% (at 1 KHz)
    • IF frequency: 1st: 243.95 MHz / 2nd: 10.7 MHz
    • Dynamic range: > 100 dB
    • Tone signal: 32.768 KHz
    • Audio output: 1 balanced XLR1 unbalanced 1/4” / 6.35mm
    • Display: high-visibility back-lit LCD with RF and AF meters
    • Power: supply: 12V, 1A, center positive (adapter included)Consumption: 520 mA ±10 mA
    • Case: half 19” EIA-rack metal case
    • Dimensions: 7.9” x 7.2” x 1.720.0 cm x 18.3 cm x 4.2 cm
    • Weight: 2.1 lbs. / 1.0 kg
  • Transmitters
    • UHF band operation: 520–937.5 MHz (region-specific)
    • Channel selection: synchronization with receiver
    • RF power output: 10 mW (maximum)
    • Frequency stability: ±0.005%
    • Deviation: ±20 KHz with limiting compressor
    • Spurious emission: > 60 dB below carrier frequency
    • Display: hand-held microphone: 2-digit 7-segment LCD
    • Belt-pack transmitter: 2-digit 7-segment LCD
    • Power: hand-held microphone: 2.4 VDC (1.2V via 2 AA batteries)
    • Belt-pack transmitter: 3 VDC (1.5V via 2 AA batteries)
    • Consumption: 120 mA 10 mA
  • Dimensions:
    • Hand-held microphone: 2.0” x 2.0” x 10.2” / 5.2 cm x 5.2 cm x 26.0 cm
    • Headset microphone: 1.5” x 0.5” x 0.5” / 3.8 cm x 1.3 cm x 1.3 cm
    • Lavalier microphone: 1.0” x 0.25” x 0.25” / 2.5 cm x 0.6 cm x 0.6 cm
    • Belt-pack transmitter: 2.6” x 3.8” x 0.9” / 6.5 cm x 9.7 cm x 2.4 cm
  • Weights:
    • Hand-held microphone: 0.5 lbs. / 0.2 kg
    • Headset microphone: 0.2 lbs. / 0.1 kg
    • Lavalier microphone: 0.1 lbs. / 0.05 kg
    • Belt-pack transmitter: 0.2 lbs. / 0.1 kg
… [ More ]
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