Product highlights

wireless system with handheld BLX2/SM58 microphone/transmitter and BLX4R rackmountable receiver 

operating range: 300' (line of sight) 

powered by two AA alkaline batteries (up to 14 hours battery life) 

transmitter LED indicates battery status 

simultaneous operation of up to 12 systems (band and RF dependent) 

locking transmitter and receiver controls 

542-572 MHz, Band H10 

receiver: XLR and 1/4" outputs 

frequency response: 50-15,000 Hz 

gain adjustment range: 10 dB 

dimensions: 

• BLX2: 9.83"L x 2.013" diameter 
• BLX4R: 7.791"W x 1.656"H x 7.50"D 

weight: 

• BLX2: 7.7 oz. (without batteries) 
• BLX4R: 2.2 lbs. (without antennas) 
• warranty: 2 years 

What's in the box

• BLX4R Single-channel rackmount receiver (Frequency band H10) 
• SM58 handheld microphone with BLX2 transmitter (H10) 
• Microphone clip 
• Short rackmount arm 
• Long rackmount arm 
• Two 4.5" 1/4-wave receiver antennas (male BNC terminal) 
• Two 21" antenna cables (male BNC terminals on each end) 
• 2 Female BNC couplers (female BNC terminals on each end) 
• 2 Internal star lock washers 
• 2 Hex lock nuts 
• 4 Rubber washers 
• Hardware pack 
• PS24US Power supply 
• 2 AA batteries 
• Zippered storage bag 
• BLX4R User Guide 
• Limited Warranty sheet 

About this item

Written by Crutchfield's Bob Bihlmayer

Roam where you want to

Shure designed their BLX family of wireless systems to set you free. This BLX24R/SM58 system includes the BLX4R rack-mount single-channel receiver and the BLX2/SM58 wireless microphone, a package which gives you the freedom to roam the stage.

Set 'em up

It's simple to set up the BLX24R/SM58's transmitter and receiver. Press the Group button on the receiver and it scans for the clearest group and channel. Then just set the transmitter to the same group and channel settings and you're ready to go. The Group and Channel can also be set manually. You can run up to 12 systems simultaneously depending on channel availability and RF environment.

Simple and free

The BLX2 transmitter and SM58 microphone combo delivers exceptional performance without a cable, while the BLX4R rack-mount receiver offers the simplicity of single-channel setup. You'll enjoy the freedom of a wireless system with Shure sound quality in an easy-to-use package.

When considering a wireless system, you'll want to pick the frequency band with the least interference from local TV stations. Shure's Wireless Frequency Finder will show you the TV stations in your area, along with a list of recommended channels. Choose the frequency band that gives you the most open channels