In a nutshell
Lectrosonics IFB System, made up of one IFBT6 transmitter and several IFBR5 receivers, makes it possible to dispatch wireless monitoring to stereo or mono headphones. The transmitter broadcasts on the UHF band, with a choice of 256 frequencies which makes it possible to avoid interferences with other wireless systems. The Lectrosonics IFBT6 transmitter, provided with a metal case, is well screened and shielded and does not pollute nearby equipment. The Lectrosonics IFBR5 receiver, also provided with a metal case, is tunable to all transmitter frequency band and its handling is very simple (automatic scanning process); it doesn't need an external antenna and can be used with any headphones model. IFB System should be used when a large number of receivers are needed.
Optional and without charge, it is also possible to use a Sennheiser ME 3-N super-cardioid electret headband microphone on the IFBT6 transmitter, with the right connector, in order to set up an unidirectional wireless intercom system, at lower cost.
Our recommendations
- Lectrosonics IFB system is only a monitoring system and, even if compression/expansion process has a good signal-to-noise ratio, bandwidth is small and pre-transmitting limiter cannot be released; it drastically reduces line-level input signal dynamics and pumping effect is quite audible: it is thus advised to under-modulate on transmitter input (about -12 dB).
- Its metal case is very sturdy, but also very heavy, making vulnerable all projecting parts, mainly, on the IFB R5 receiver, output level control and mini phone jack.
Optional and without charge, it is also possible to use a Sennheiser ME 3-N super-cardioid electret headband microphone on the IFBT6 transmitter, with the right connector, in order to set up an unidirectional wireless intercom system, at lower cost.
- Its metal case is very sturdy, but also very heavy, making vulnerable all projecting parts, mainly, on the IFB R5 receiver, output level control and mini phone jack.
