Audibax Missouri 2500 Frequency B - Dual VHF wireless system with 2 bodypacks, 2 Madonna-style headsets and 2 lavaliers
The Audibax Missouri 2500 Frequency B is a dual VHF wireless microphone system designed for spoken word and stage applications requiring freedom of movement and maximum simplicity. The package includes one dual receiver with independent volume control per channel, two bodypack transmitters with gain adjustment, and four microphones (two Madonna-style headset microphones and two lavalier/lapel microphones ) so you can choose the most comfortable format for each application. It operates on Frequency B with two fixed carriers ( 185.500 MHz and 191.900 MHz ) and uses diversity antennas for stable reception, offering an approximate range of up to 80 m under optimal conditions. It features XLR outputs and a 6.35 mm combo jack output for direct connection to mixing consoles, powered speakers, or installation systems.
Main features
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Complete configuration : 1 dual receiver + 2 bodypacks + 2 headset microphones + 2 lavalier microphones.
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VHF Band – Frequency B : two fixed frequencies 185,500 MHz (channel A) and 191,900 MHz (channel B).
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Diversity antennas for better reception and lower probability of interruptions.
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Dedicated controls : gain on each pack and independent volumes per channel on the receiver.
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RF/AF indicators and display on the receiver for monitoring link and audio.
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Connectivity : XLR and 6.35 mm jack outputs (mixed output).
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Cardioid capsules (headband and lavalier) with frequency response 40 Hz–18 kHz .
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Performance : signal-to-noise ratio > 103 dB , THD < 0.5% , frequency stability ± 0.0005% , sensitivity −105 dB .
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Power supply : batteries with 2×AA each; receiver powered by 230V AC .
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Range : up to approximately 80 m depending on the environment.
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Color : black.
Product benefits
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Immediate versatility : includes both formats (headband and lavalier) to choose according to the dynamics of the event without buying extra accessories.
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Live stability : the diversity system helps reduce micro-cuts when the speaker moves around.
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Clear sound : cardioid capsules that prioritize the voice and attenuate ambient noise, improving intelligibility.
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Easy integration : XLR and 6.35 mm jack outputs compatible with standard mixing consoles and powered speakers.
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Precise control : gain on the receiver and volume per channel to balance two speakers independently.
Use cases
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Presentations and conferences with two speakers in meeting rooms, auditoriums or corporate events.
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Guided classes (gyms, dance academies) with stable headset and hands-free operation.
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Theaters, parishes and educational centers for discreet voice reinforcement with lavalier.
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Rental and fixed installations that require a simple, robust and economical dual system.
Frequently Asked Questions
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What does “Frequency B” mean? It is the version of the system that operates on the 185.500 and 191.900 MHz carriers. These are fixed channels in the VHF band.
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Can I use a headset and lavalier microphone simultaneously? Yes, the pack includes two beltpacks and four microphones (2+2). Connect the type of microphone you need to each beltpack.
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How do I connect the receiver to my equipment? Use the 6.35 mm mixed output to carry both channels on a single line, or the XLR outputs to route each channel separately to your mixer.
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How far does it reach? Up to approximately 80 m under optimal conditions and with a clear line of sight. Walls, metal structures, or Wi-Fi networks can reduce the range.
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Does it require rechargeable batteries? The flasks operate on standard AA batteries (alkaline or rechargeable). The receiver is powered by 230V AC .
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Does it comply with local regulations? Always check your country's spectrum regulations before final installation.
Installation and usage tips
- Position the receiver with a direct line of sight to the area of use and correctly orient the two antennas to take advantage of the diversity.
- Adjust the gain on each beltpack and the volume on the receiver until you achieve a high level without distortion.
- Attach the headband to the corner of the mouth (2–3 cm) and secure the lavalier at the level of the sternum, away from clothing friction.
Project description
Dual Frequency B VHF Wireless System with 1 dual receiver, 2 bodypack transmitters, 2 headset microphones and 2 lavalier microphones; frequencies 185.500/191.900 MHz; diversity antennas; response 40 Hz–18 kHz; SNR >103 dB; THD <0.5%; frequency stability ±0.0005%; sensitivity −105 dB; XLR and 6.35 mm jack outputs; volume control per channel on receiver; gain, on/off and mute on bodypacks; power supply bodypacks 2×AA, receiver 230 V AC; black color.
