ULX System Components

All systems include either a ULXS4 Standard Diversity Receiver or ULXP4 Professional Diversity Receiver.

Bodypack systems include a choice of lavalier, headworn, or instrument microphones.

Handheld systems include a choice of interchangeable microphone heads.

Guitar systems include a 1/4” to mini 4-pin cable.

ULXP4 receivers include rack-mounting hardware.


Active Antennas

The antenna connectors on the ULX receiver provide 12 V DC for active circuit antennas.

Caution: Use only Shure antenna accessories to ensure the best operation. Do not use splitters, combiners, or antennas that provide a DC ground, as this can cause the receiver to function improperly.

Antenna Combiners and Accessories

The supplied antennas can be connected directly to the BNC-type ANTENNA connectors. However, optional antenna mounting accessories from Shure can improve reception and reduce rack clutter. Use the following guidelines:

  • Antennas and receivers must be from the same band.
  • Mount antennas more than 40 cm (16 inches) apart.
  • Use Shure UA825 or UA850 low-loss coaxial antenna cable (or any 50 ohm, low-loss cable such as RG-8U).

Visit www.shure.com for more information on wireless antenna accessories.

Coaxial Cables

Front Mount Antenna Kit

1/2-Wave Antenna included with ULXP4 systems

Inline Antenna Amplifier

for long antenna cable runs

Antenna Rack Mount Kit

Active Directional Antenna

for more focused reception

Distribution Amplifier

combines antennas and power supplies for multiple receivers

Rack Installation

Rackmount Options

The following shows rackmounting options for one to four receivers and lists the required accessories.


Power switch

Power Connector

Connect using the supplied AC adapter or certified 14–18 Vdc (550 mA) replacement supply.



Battery Life

Use only 9V alkaline or lithium batteries. Typical life for common types of 9V batteries are listed below. For detailed information on battery performance, contact Shure Applications Engineering.


  • Lithium (16 hours)
  • Alkaline (8 hours)

Not recommended:

  • Carbon-Zinc (½ hour)
  • Rechargeable Ni-Cd (2 hours)
  • Rechargeable Ni-MH (2½ hours)


  • Battery life varies with type and manufacturer.
  • Batteries stored for more than a year or stored in excessively hot environments may experience a higher failure rate.
  • Do not use rechargeable batteries with a fully-charged rating of greater than 9 V (for example, 9.6 V).
  • Transmitters require a minimum of 6 V to operate.

Power/Mute Switch

  • Turn transmitter off to mute the microphone or conserve battery power.
  • Use the lock feature to avoid accidental muting of the microphone during a performance.

Power Indicator (BAT)

Green: ready

Red: battery power low

Note: Remaining battery life varies with battery type.

Battery Indicator

Both the transmitter and receiver LCD shows approximate operation time remaining for the transmitter.

Single System

If you encounter wireless interference, perform a channel scan on the receiver and use the selected channel. You usually do not need to change the group.

Multiple Systems

To maximize performance, set all wireless systems to different channels from the same group. These channels are selected to work well together.

Follow these steps when using group and channel scan with multiple systems.

  1. Power off all system transmitters. Turn on all other wireless or digital devices as they would be during the performance or presentation.
  2. On the first receiver: Perform a group scan. Note the selected group, then use channel scan to find the first open channel in that group.
  3. Power on the first transmitter and set it to the selected group and channel.
  4. IMPORTANT: Leave the first transmitter powered on while setting up the next system.
  5. For each additional system: Set to the same group as the first. Perform a channel scan and set the receiver and transmitter to the selected channel.
  6. Leave each transmitter on while setting up additional systems.


  • Keep each transmitter at least two meters (6 feet) apart.
  • If using systems from different bands, set up all systems from the same band together.

Tip: To reduce setup time, you can manually set up the group and channels before arriving at the venue. Visit www.shure.com for a list of groups and channels that are anticipated to be free of interference in a particular city or region.

Automatic Frequency Scan

Channel Scan

This feature scans for an open channel in the selected group.

Group Scan (ULXP4 only)

The "group scan" feature on the ULXP helps maximize the number of systems you can install at a single venue. It scans for wireless interference and finds the group with the most open channels.

Changing Group and Channel

If you encounter wireless interference, set the receiver and transmitter to a different channel or group.

Change Channel

Change Group

* Note: You can reverse the scroll direction by holding SET and pressing MODE.

Wireless Indicators

RF Indicator

Indicates wireless activity over the selected channel.

Note: When the antenna and battery indicators are illuminated, the RF indicator shows signal strength from the transmitter. Otherwise, it is showing interference from another source. Select a different channel.

Antenna Indicator

This indicator shows which antenna is receiving the strongest signal from the transmitter.

Frequency Display


For models sold in the United States only. Displays the TV channel occupied by the selected frequency.

Frequency Master List Mode

Master List mode offers more precise frequency selection for larger, multiple-system installations.

Enter Master List mode on the receiver or transmitter by holding down the SET button for 10 seconds. Set GROUP and CHANNEL as you would in normal mode.

Note: The unit must remain in Master List mode to operate at the selected frequency.

Exit Master List mode by holding the SET button for 10 seconds.


The factory setting offers the optimum performance for most installations.

Increasing squelch filters out all but the highest quality signal, but this decreases operating range. Decreasing squelch extends the operating range, but can increase signal noise.

Audio Output

Audio Output Connectors

Balanced XLR: Connect to a mixer or other professional audio input. Use the MIC/LINE switch to adjust for microphone or line-level inputs.

Unbalanced 6.35 mm (1/4"): Connect to high impedance inputs, such as a guitar amplifier.

Note: The LINE/MIC switch does not affect the 6.35 mm (1/4") jack.

Receiver Output Level

Adjusts the level of the receiver's audio outputs.


This icon appears when the input signal overloads the transmitter. The icon is displayed for 2 seconds after input overload is detected.

Transmitter Gain

For best audio quality, adjust transmitter gain so only the green and yellow TX AUDIO LEDs flicker. (Occasional illumination of the red LED is okay.)

Green = nominal

Yellow = peak

Red = overload


  1. Set the attenuator (pad) switch to 0 dB for microphones and –20 dB for guitars. (Some low output instruments may not need attenuation.)
  2. Adjust gain control as necessary.


  • Fully clockwise for quiet to normal vocal performance.
  • Halfway counterclockwise for loud vocal performance.
  • Fully counterclockwise for horn or percussive instruments.

Locking the Receiver (ULXP4 Only)

This feature prevents accidental setting changes.


Hold the SET button while turning the control wheel left, right, left.

Note: If LEVEL flashes on the LCD, decrease the LEVEL control to continue. This feature safeguards against sudden level increases when the lock is removed.

Locking the Transmitter

Lock/Unlock Power (On)

Hold SET and MODE for four seconds or until the lock icon appears.

Lock/Unlock Frequency

Hold the SET button while powering on the transmitter.


No power: Check battery and power supply connections and voltage. Check the power switch on the transmitter.

The LCD displays "E0 00" or similar code: Exit master list mode by holding the SET button for ten seconds.

Can't turn off or change settings on the transmitter or receiver: The interface is locked. See the section on locking the interface.

No audio: If the antenna and battery indicators do not appear on the receiver, then it is not receiving a signal from the transmitter. Make sure the transmitter and receiver are tuned to the same group and channel.

Faint or distorted audio: Adjust transmitter gain, bodypack attenuator switch, and receiver output level.

Noise: Noise usually results from wireless interference or a weak signal from the transmitter. See Tips for Improving System Performance.

Tips for Improving System Performance

If you encounter wireless interference or dropouts, try the following:

  • Replace the transmitter battery with a fresh alkaline battery (avoid rechargeable batteries).
  • Choose a different frequency channel.
  • Reposition the antennas so there is nothing obstructing a line of sight to the transmitter (including the audience).
  • Avoid placing transmitter and receiver where metal or other dense materials may be present.
  • Move the receiver to the top of the equipment rack (or remote mount antennas outside the rack).
  • Remove nearby sources of wireless interference, such as cell phones, two-way radios, computers, media players, and digital signal processors.
  • Keep transmitters more then two meters (6 feet) apart.
  • Keep the transmitter and receiver more than 5 meters (15 ft) apart.
  • Point the receiver antenna tips away from each other at a 45° angle, and keep them away from large metal objects.
  • During sound check, mark "trouble spots" and ask presenters or performers to avoid those areas.

Parts and Accessories

Included Accessories

Microphone Stand Adapter (ULX2) WA371
Grip/Switch Cover (ULX2) WA555
Zipper Bag (ULX1) 95A2313
Zipper Bag (ULX2) 95B2313
Screwdriver (ULX2) 80A498

Optional Accessories

Passive Antenna Splitter/Combiner Kit UA221
UHF Line Amplifier UA830WB
UHF Powered Directional Antenna UA874US
UHF Antenna Power Distribution Amplifier (U.S.A.) UA844SWB
UHF Antenna Power Distribution Amplifier (Europe) UA844SWB-E
UHF Antenna Power Distribution Amplifier (UK) UA844SWB-UK
33 m (100 ft.) BNC–BNC cable UA8100
1.8 m (6 ft.) BNC–BNC cable UA806
Antenna Rack Panel UA440
Front Mount Antenna Kit (Includes 2 cables and 2 bulkhead adapters) UA600
Remote Antenna Bracket with BNC Bulkhead Adapter UA505
Rack Mount Kit for single Receiver UA506
Rack Mount Kit for Two Receivers UA507
Carrying Case WA610
Microphone Adapter Cable (XLR) WA310

Replacement Parts

AC Adapter (120 VAC, 60 Hz) PS41
AC Adapter (220 VAC, 50 Hz) PS41AR
AC Adapter (230 VAC, 50/60 Hz) PS41AZ
AC Adapter (230 VAC, 50/60 Hz, Europlug) PS41E
AC Adapter (230 VAC, 50/60 Hz) PS41UK
AC Adapter (100 VAC, 50/60 Hz) PS41J
SM58® Cartridge with Grille (ULX2/58) RPW112
BETA 58A® Cartridge with Grille (ULX2/ BETA 58) RPW118
SM86 Cartridge with Grille (ULX2/SM86) RPW114
SM87A Cartridge with Grille (ULX2/87) RPW116
BETA 87A Cartridge with Grille (ULX2/BETA 87A) RPW120
BETA 87C Cartridge with Grille (ULX2/BETA 87C ) RPW122
Matte Silver Grille for SM58 RK143G
Matte Silver Grille for SM86 RPM226
Matte Silver Grille for BETA 58A RK265G
Matte Silver Grille for BETA 87A RK312
Black Grille for SM87A RK214G
Black Grille for BETA 58A RPM323G
Black Grille for BETA 87A and BETA 87C RPM324G
Belt Clip 44A8013A
1/4-Wave Antenna (470 - 752 MHz) UA400B
1/4-Wave Antenna (774 - 952 MHz) UA400
1/2-Wave Antenna (774 - 862 MHz) UA820A
1/2-Wave Antenna (638 - 698 MHz) UA820L3
1/2-Wave Antenna (554 - 590 MHz) UA820D
1/2-Wave Antenna (740 - 814 MHz) UA820Q
1/2-Wave Antenna (470 - 530 MHz) UA820G
1/2-Wave Antenna (746 - 784 MHz) UA820E
1/2-Wave Antenna (572 - 596 MHz) UA820F
1/2-Wave Antenna (578 - 638 MHz) UA820J


Industry Canada ICES-003 Compliance Label: CAN ICES-3 (B)/NMB-3(B)

This product meets the Essential Requirements of all relevant European directives and is eligible for CE marking.

The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance

Authorized European representative:

Shure Europe GmbH

Headquarters Europe, Middle East & Africa

Department: EMEA Approval

Jakob-Dieffenbacher-Str. 12

75031 Eppingen, Germany

Phone: 49-7262-92 49 0

Fax: 49-7262-92 49 11 4

Email: info@shure.de


Certified under FCC Part 74.

Certified by IC in Canada under RSS-123 and RSS-102.



Approved under the Declaration of Conformity (DoC) provision of FCC Part 15.

Certified in Canada by IC to RSS-123.

Important Product Information


Licensing: A ministerial license to operate this equipment may be required in certain areas. Consult your national authority for possible requirements. Changes or modifications not expressly approved by Shure Incorporated could void your authority to operate the equipment. Licensing of Shure wireless microphone equipment is the user’s responsibility, and licensability depends on the user’s classification and application, and on the selected frequency. Shure strongly urges the user to contact the appropriate telecommunications authority concerning proper licensing, and before choosing and ordering frequencies.

Information to the user

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and the receiver.
  • Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
  • Consult the dealer or an experienced radio/TV technician for help.

Note: EMC conformance testing is based on the use of supplied and recommended cable types. The use of other cable types may degrade EMC performance.

Australia Warning for Wireless

This device operates under an ACMA class licence and must comply with all the conditions of that licence including operating frequencies. Before 31 December 2014, this device will comply if it is operated in the 520-820 MHz frequency band. WARNING: After 31 December 2014, in order to comply, this device must not be operated in the 694-820 MHz band.

Please follow your regional recycling scheme for batteries, packaging, and electronic waste.

Wiring Diagram


RF Carrier Range

470,000–865,000 MHz

varies by region

Working Range

100 m (300 ft) typical

Note: Actual range depends on RF signal absorption, reflection and interference.

Audio Frequency Response

25 Hz – 15 kHz, ±2 dB

Note: Dependent on microphone type


±38 kHz deviation compressor-expander system with pre- and de-emphasis

Dynamic Range

>100 dB, A-weighted

Image Rejection

80 dB, typical

RF Sensitivity

1.26 µV for 12 dB SINAD, typical

Spurious Rejection

75 dB, typical

Ultimate Quieting

Ref. ±38 kHz deviation with 1 kHz tone

>105 dB, A-Weighted

Total Harmonic Distortion

Ref. ±38 kHz deviation with 1 kHz tone

0.3%, typical

Operating Temperature Range

-20°C (-4°F) to 49°C (120°F)

Note: Battery characteristics may limit this range.


Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive voltage on pin 2 (with respect to pin 3 of low-impedance output) and the tip of the high impedance 1/4-inch output.

Battery Life

8 to 9 hours (9 V alkaline)


Gain Adjustment Range

25 dB

Attenuation Switch

0, −20 dB


96.5 x 67 x 26.7 mm (3.86 x 2.68 x 1.10 in.), H x W x D


79 g (2.8 oz.) without batteries

Power Requirements

9 V alkaline

Input Impedance

1 MΩ

RF Output Power

30  mW maximum

varies by region

Transmitter Input


4-Pin male mini connector (TA4M)


Unbalanced, active


Microphone 75 kΩ
WA302 1 MΩ

Maximum Input Level

1 kHz at 1% THD

Microphone −4 dBV (1.82 Vp-p)
WA302 PAD OFF (0dB) 5 dBV (5 Vp-p)
PAD ON (−20dB) 25 dBV (50 Vp-p)

Pin Assignments


1 ground (cable shield)
2 + 5 V Bias
3 audio
4 Tied through active load to ground (On instrument adapter cable, pin 4 floats)


Gain Adjustment Range

20 dB


SM58 229 x 51 mm (9 x 2 in.), L x Dia.
BETA 58 221 x 51 mm (8.7 x 2 in.), L x Dia.
SM86 213 x 49 mm mm (8.4 x 1.9 in.), L x Dia.
SM87/BETA 87 223 x 51 mm (8.8 x 2 in.), L x Dia.


SM58/BETA 58 289 g (10.2 oz.) without batteries
SM86 251 g (8.8 oz.) without batteries
SM87/BETA 87 258 g (9.1 oz.) without batteries

Power Requirements

9 V alkaline

RF Output Power

30  mW maximum

varies by region

Transmitter Input


Unbalanced, active


20 kΩ

Maximum Input Level

1 kHz at 1% THD

12 dBV (10 Vp-p)



ULXS4 43 x 214 x 163 mm (1.72 x 8.56 x 6.52 in.), H x W x D
ULXP4 43 x 214 x 172 mm (1.72 x 8.56 x 6.88 in.), H x W x D


ULXS4 1049 g (2 lbs, 5 oz.)
ULXP4 1105 g (2 lbs, 7 oz.)

Power Requirements

14–18 V DC (negative ground), 550 mA

Analog Audio Output


XLR Output Active Balanced
6.35 mm (1/4") output Unbalanced


XLR Output MIC setting 1848 Ω
LINE setting 75 Ω
6.35 mm (1/4") output 3 kΩ

Maximum Audio Output Level

Ref. ±38 kHz deviation with 1 kHz tone

XLR connector (into 600 Ω load) MIC setting −17 dBV
LINE setting +3.9  dBV
6.35 mm (1/4") connector (into 3 kΩ load) −2 dBV

Pin Assignments

XLR Output 1=ground, 2=hot, 3=cold
6.35 mm (1/4") connector Tip=audio, Ring/Sleeve=ground

Receiver Antenna Input

Connector Type



50 Ω

Nominal Input Level

−95 to −30 dBm

Maximum Input Level

−20 dBm

DC bias

12 V DC, 150 mA, maximum