
Review Summary
Accidents happen where life happens. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failure, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for purchase Internationally or in U.S. Territories.
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Band 941: 941.525-951.975
952.875-956.225
956.475-959.825 MHz
25 kHz or 100 kHz, selectable; VHF: 125 kHz
1 uv (20 dB SINAD)
95 dB A-weighted
90 dB
50 dB, 10 uV to 100 mV
+/-20 kHz
Greater than 70 dB
-4 degree to 113 degree F (-20 to 45 degrees C)
0 dBm
100 Hz to 10 kHz, (+/-1 dB)
1V RMS into 50 ohms minimum
Headphone cable
16.0 Ohms
10 frequencies can be stored as presets
Top Panel: Single knob controls Audio Output Level and Power On
Side Panel: Membrane switches with LCD interface for Frequency Selection and Preset function
Multi-color LED indicator for power on and battery status
LB-50 Li-ion 3.6 V 1000 mAh
8 hours per charge with LB-50 Li-ion battery
120 mA
2.8 x 2.4 x 0.8" (71.1 x 70.0 x 20.3mm)
3.4 oz (96.39g) (with battery and wire belt clip)
Wireless IFB (interruptible fold back) systems are used for talent cueing and crew communications in broadcast and motion picture production. In other cases, the IFB system is used by directors and other management to monitor program audio during a production. The IFBR1B receiver provides simplicity and flexibility in a package that is intuitive for untrained users to operate. In spite of its tiny size, the new IFBR1B receiver offers excellent performance on par with all of Lectrosonics' IFB products.
The design uses +/-20 kHz FM deviation for efficient use of the bandwidth, with compandor noise reduction circuitry for an excellent signal to noise ratio. A supersonic Pilot Tone signal controls the audio output squelch to keep the receiver silent when no transmitter signal is received. The incoming RF signal is filtered and amplified, then mixed down to the IF frequency with a microprocessor controlled synthesizer.
If a monaural earpiece is connected, this condition is automatically accommodated, with no loss of audio output power or battery life. Full output power is available with either type of connector, without the power losses that result from a resistive circuit design. The headphone cable doubles as the receiving antenna. The receiver will drive a wide variety of earbuds, headphones and induction neck loops at substantial levels, with loads from 16 Ohms to 600 Ohms.
An attached sliding door makes battery installation easy. The USB port is located in the battery compartment. The receiver operates on a single 3.6 V rechargeable LB50 Li-ion battery that will provide about eight hours of operation per charge. The LED indicator changes color from green to red as the battery voltage declines to provide plenty of warning before operation ceases. Inside the battery door is a USB port for firmware updates in the field. The IFBR1B is housed in a rugged machined aluminum package. A wire beltclip is included and provides a secure mounting on a wide variety of belts, pockets and fabrics.