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Lectrosonics Quadra Wireless Audio System Overview | Full Compass

1,150 views · Published 6 January 2012 · 1:46 · Indexed 13 October 2026

Channel: Full Compass · 2012 · Music

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Lectrosonics Quadra Wireless Audio System overview at Full Compass Systems with Matt Robertson of Lectrosonics Sales and Marketing Development

The M4T is a half-rack transmitter which can accept up to four inputs from digital or analog sources.  The inputs can be configured as follows:

• Four analog inputs using all four jacks
• Two digital inputs using jack 1 and two balanced analog inputs using jacks 3 and 4
• Four digital channels using jacks 1 and 2

The input connectors are full size balanced XLR types for AES/EBU and balanced line level analog signals.  Input preamp circuits use a special balanced amplifier with very high common mode rejection to minimize hum and noise.

Either analog or AES/EBU digital inputs signals are converted to an internal 24-bit digital format which is then encoded, organized into packets, and passes to an RF modulator using spread spectrum techniques and error correction for robust reception.  The modulated RF signal is filtered before and after amplification to suppress out-of-band noise and spurious signals, and a circulator/isolator guards against intermodulation interference (IM).

The transmitter can be free-standing or rack mounted in single units (via an option rack mounting kick) or in a dual configuration using supplied hardware.  A USB port is provided for firmware updates.

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