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Shure LX4-W Wireless Receiver

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Shure LX4-W Wireless Receiver

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Description

Widely used in installed sound and live music situations, LX Wireless systems deliver top–notch performance and VHF reliability at a moderate price. They enable users to configure a wireless system, with a wide array of professional handheld, lavalier, instrument and headworn microphone options as well as single–antenna or diversity receivers. Read more

Features

  • Audio Diversity : MARCAD circuit blends dual RF paths for drop-out resistance
  • Form Factor : ½-rack width; supports single or dual rack mounting
  • Squelch Control : Front-panel manual / noise-sensing squelch
  • Power Supply : In-line PS40-series supply with locking DC and transformer plug
  • Outputs & Switching : XLR & ¼″ outputs; mic/line switch; output level control
  • LED Indicators : RF meters (A & B) and audio level meter

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Widely used in installed sound and live music situations, LX Wireless systems deliver top–notch performance and VHF reliability at a moderate price. They enable users to configure a wireless system, with a wide array of professional handheld, lavalier, instrument and headworn microphone options as well as single–antenna or diversity receivers. Read more

Features

  • Audio Diversity : MARCAD circuit blends dual RF paths for drop-out resistance
  • Form Factor : ½-rack width; supports single or dual rack mounting
  • Squelch Control : Front-panel manual / noise-sensing squelch
  • Power Supply : In-line PS40-series supply with locking DC and transformer plug
  • Outputs & Switching : XLR & ¼″ outputs; mic/line switch; output level control
  • LED Indicators : RF meters (A & B) and audio level meter

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About the Shure LX4-W Wireless Receiver

The Shure LX4-W is a professional wireless receiver operating in the UHF band, designed as a component of the premium Shure wireless microphone systems. It is engineered to provide reliable, high-fidelity audio reception for critical applications in live sound, broadcast, and installed audio environments. The receiver utilizes advanced companding and noise reduction circuitry to deliver clear, transparent audio that faithfully reproduces the source, while its robust UHF transmission offers stable operation with minimal dropouts. The unit features true diversity reception with two separate internal antennas, continuously analyzing and selecting the strongest signal path to maintain a consistent audio link and maximize range, even in challenging RF conditions typical of crowded event spaces.

Housed in a durable half-rack metal chassis, the LX4-W is built for both rack mounting in fixed installations and portable use in touring racks. It offers intuitive controls and a clear display for monitoring RF signal strength, audio levels, and battery status of the paired transmitter. The receiver provides multiple output options, including balanced XLR and unbalanced 1/4" connectors, ensuring compatibility with a wide range of mixers, amplifiers, and recording equipment. Its design emphasizes operational simplicity and reliability, making it a trusted choice for audio professionals who require a no-compromise wireless link for microphones or instruments.

The LX4-W is designed to work seamlessly with compatible Shure handheld and bodypack transmitters, forming a complete and robust wireless system. It supports frequency-agile operation, allowing users to select from a wide range of frequencies within its band to avoid interference. This receiver represents a blend of proven UHF wireless technology and professional-grade construction, delivering the performance and durability needed for mission-critical audio transmission where consistent, high-quality sound is non-negotiable.

Key Features

  • Audio Diversity : MARCAD circuit blends dual RF paths for drop-out resistance
  • Form Factor : ½-rack width; supports single or dual rack mounting
  • Squelch Control : Front-panel manual / noise-sensing squelch
  • Power Supply : In-line PS40-series supply with locking DC and transformer plug
  • Outputs & Switching : XLR & ¼″ outputs; mic/line switch; output level control
  • LED Indicators : RF meters (A & B) and audio level meter

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Shure LX4-W Wireless Receiver Specs

RF & Wireless
Frequency Range
UHF Band (Region Specific)
Diversity System
True Diversity
Modulation
Frequency Agile
Audio Output
Output Connectors
XLR, 1/4"
Output Type
Balanced & Unbalanced
Companding
Wideband
Control & Display
Front Panel Display
LCD
Indicators
RF, Audio, Battery
Squelch Control
Adjustable
Physical & Power
Form Factor
Half-Rack
Power Supply
External DC
Chassis Material
Metal
Compatibility & Performance
Transmitter Compatibility
Shure LX/ULX Series
Pilot Tone
Yes (for mute)
Audio Bandwidth
40 Hz - 18 kHz

Key Features

  • Audio Diversity : MARCAD circuit blends dual RF paths for drop-out resistance
  • Form Factor : ½-rack width; supports single or dual rack mounting
  • Squelch Control : Front-panel manual / noise-sensing squelch
  • Power Supply : In-line PS40-series supply with locking DC and transformer plug
  • Outputs & Switching : XLR & ¼″ outputs; mic/line switch; output level control
  • LED Indicators : RF meters (A & B) and audio level meter

Already own this item and want to sell it?

Click here to sell your item

FAQs about Shure LX4-W Wireless Receiver

What is the Shure LX4-W?

The Shure LX4-W is a single-channel, half-rack analog VHF wireless receiver featuring MARCAD (Maximal Ratio Combining Audio Diversity) circuitry. It operates on fixed frequencies within the high-band VHF spectrum (around 169–216 MHz) and was designed to provide interference-free audio transmission for live vocals, speech, and instruments.

What does the "MARCAD" diversity system do?

Unlike standard antenna switching diversity systems that abruptly jump between antennas when signal weakens, Shure’s MARCAD system continuously combines the RF signals from both antennas. This real-time ratio blending significantly reduces multi-path phase cancellation, enhances RF sensitivity, and virtually eliminates audio dropouts.

What audio outputs are available on the rear panel?

The unit features two separate audio output connections:

  • One balanced, 3-pin male XLR output delivering professional mic-level audio.
  • One unbalanced 1/4-inch (6.35 mm) phone jack delivering instrument/line-level audio.

How do you adjust squelch on the LX4 receiver?

A dedicated rotary squelch control is located on the rear panel. Squelch sets the RF signal threshold required to unmute the audio path: turning it clockwise raises the threshold to silence weaker, stray RF interference, while setting it counterclockwise maximizes usable operating range.

What front-panel indicators and meters are provided?

The front panel includes several visual status LEDs:

  • Antenna Diversity Indicators: Yellow LEDs showing active RF reception on Antenna A, Antenna B, or combined MARCAD processing.
  • RF Signal Level Meter: A 5-segment LED ladder displaying received radio signal strength.
  • Audio Level Meter: A multi-segment LED meter showing incoming audio modulation, including an audio peak indicator.

Is the operating frequency tunable or fixed?

The LX4-W operates on a factory-crystal-controlled, single fixed frequency indicated by a frequency code on the rear label. It does not feature multi-channel frequency agility; to operate multiple systems concurrently, each receiver and matching transmitter must be ordered on separate, coordinated VHF frequencies.

What type of antennas does the unit use?

The receiver features two 1/4-wave, single-section telescoping whip antennas connected via rear-panel BNC connectors. For optimal diversity reception, the antennas should be oriented in a "V" configuration (angled at approximately 45 degrees outward from vertical).

How is the LX4 powered?

The unit operates on 12 to 18 Vdc (at approximately 300 mA) using an external AC/DC wall adapter (such as the Shure PS20/PS21 power supply). The DC input jack is located on the rear panel next to the cable retention clip.

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