LMb Wideband Bodypack Transmitter

Block A1 (470.100 - 537.575 MHz)

Model:

LMB-A1

Price:	$1,070.00

Features

Get 50% off a transmitter when purchased as part of a 2-channel SRc digital wireless system or 20% off the entire system when purchased as part of a Venue 2 system from 3/20/26 - 4/30/2026. Details here.
Covers three standard frequency blocks
Digital Hybrid Wireless for compander-free audio
50 mW RF power
Fixed antenna
Compatibility modes for use with analog receivers
25 or 100 kHz tuning steps for up to 3072 selectable frequencies
Integrated multi-function switch for mute or talkback modes
Wide range input gain control in 1 dB steps

Description

Overview

The LMb is the latest successor in Lectrosonics’ line of economical beltpack transmitters designed for applications including theater, house of worship, TV, ENG, video and film production. The LMb features an all-metal housing, wire belt clip, 50 mW of RF power, 25 or 100 kHz tuning steps (yielding up to 3,072 selectable frequencies) and an integrated multi-function switch with menu-selectable modes for power, mute or talkback. A graphic LCD and membrane switch panel plus IR synch port make setup and operation a snap.

The LMb transmitter can be configured to operate as a “one touch” device with a single power on/off switch on the top panel, or with full access to all operational parameters using the side panel membrane switches and LCD interface. The top panel switch can also be configured to provide a mute or talkback function.

Frequencies are selectable in 100 kHz or 25 kHz steps across a maximum tuning range of 76.7 MHz. This yields a total of 3072 available frequencies across three standard frequency blocks. The tuning range varies in other blocks to meet applicable frequency allocations.

The servo bias input accepts mic or line level signals with a wide range of gain adjustment in 1 dB steps. Accurate LED indications on the top panel and a bar graph indicator on the LCD allow precise gain adjustments to be made for the maximum signal to noise ratio and minimum distortion. The limiter in the preamp can cleanly handle signal peaks over 30 dB above full modulation, allowing the input gain to be set high enough to achieve the maximum signal to noise ratio.

Compatibility with earlier analog Lectrosonics receivers, Lectrosonics IFB receivers and some receivers from other manufacturers is provided by DSP emulation modes selected in the LCD menu.

The housing is an aluminum extrusion with machined aluminum top and control panels, finished with an ultra hard, black electroless nickel finish called ebENi.

Power is provided by two AA batteries in series. Battery polarity is indicated by a label inside the compartment. The machined aluminum battery door latches closed securely, and cannot be jarred open accidentally.

Specifications

<Block A1 Operating Frequencies>470.100 - 537.575 </Block A1 Operating Frequencies> <Frequency Selection Steps> Selectable; 100 kHz or 25 kHz </Frequency Selection Steps> <RF Power Output> Selectable; 50mW </RF Power Output> <Pilot Tone (Digital Hybrid mode)> 25 to 32 kHz; 5 kHz deviation </Pilot Tone (Digital Hybrid mode)> <Frequency Stability> ± 0.002% </Frequency Stability> <Deviation> ± 75 kHz max. (Digital Hybrid mode) </Deviation> <Spurious Radiation> 60 dB below carrier </Spurious Radiation> <Equivalent Input Noise> –120 dBV (A-weighted) </Equivalent Input Noise> <Mic Input Level> Nominal 2 mV to 300 mV, before limiting; Greater than 1V maximum, with limiting. </Mic Input Level> <Input Impedance> 2k Ohm </Input Impedance> <Input Limiter> DSP controlled, dual envelope “soft” limiter with greater than 30 dB range </Input Limiter> <Gain Control Range> 44 dB; digital control </Gain Control Range> <Modulation indicators> Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulation; LCD bar graph </Modulation indicators> <Audio Performance (Digital Hybrid mode)> </Audio Performance (Digital Hybrid mode)> <Frequency Response> 90 Hz to 20 kHz (+/-1dB) </Frequency Response> <Low Frequency Roll-off> –12 dB/octave; 70 Hz </Low Frequency Roll-off> <THD> 0.2% (typical) </THD> <SNR at receiver output, SmartNR OFF> 103.5/108.0 (without limiting/with limiting) </SNR at receiver output, SmartNR OFF> <SNR at receiver output, SmartNR NORMAL> 107.0/111.5 (without limiting/with limiting) </SNR at receiver output, SmartNR NORMAL> <SNR at receiver output, SmartNR FULL> 108.5/113.0 (without limiting/with limiting) </SNR at receiver output, SmartNR FULL> <Audio Input Jack> Switchcraft 5-pin locking (TA5F) </Audio Input Jack> <Antenna> Galvanized steel, flexible wire </Antenna> <Battery> Two AA; alkaline, lithium, NiMH rechargeable </Battery> <Battery Life> Duracell Quantum, 4.75 hours; Eneloop 2400 mAH NiMH, 6 hours </Battery Life> <Weight> 5 ounces (141 grams), with alkaline AA batteries and wire belt clip </Weight> <Dimensions> 3.2 x 2.4 x .8 in. (81 x 61 x 20 mm) </Dimensions> <Emission Designator> 180KF3E </Emission Designator>

In the Box

Review

Add new comment

Consumer Alert

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device.

For more information, visit the FCC at www.fcc.gov or call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC).

Buy/Rent

Buy

Product:

Add to Wishlist

Rent

Price:

$0.00/billing day

Please note that rental items will be provided from available frequency and color options. If you have a preference or requirement, please indicate it in order comments.

# of billing days subject to duration.
Week = 3 billing days/week
3 Weeks or more = 2 billing days/week

Manual