- For Fitness Instructors
- SM31FH Cardioid Fitness Headset Mic
- Moisture-Repellent Mic Construction
- Lightweight Bodypack Transmitter
- 123 Auto-Scan Frequencies
- Single-Channel Rackmount Receiver
- Automatic Frequency Selection
- Adjustable Output Level
- 14-Hr AA Batteries
- Expandable to 12 Mic Channels/300' Range
The Shure BLX4R is a single-channel wireless receiver compatible with the BLX1 bodypack transmitter and BLX2 handheld transmitters. It features a rugged metal chassis and, using the included hardware, can be rackmounted with the two removable antennas positioned on the front of the rack—for optimal signal reception in A/V installations and sound-reinforcement applications.
The BLX4R offers one-touch QuickScan frequency selection to quickly search 123 available frequencies and locate a clean RF channel in case of interference. It also employs microprocessor-controlled diversity technology to reduce dropouts. BLX systems allow up to 12 mic channels to operate simultaneously in each frequency band, at a range up to 300'.
The LCD display shows group and channel settings, and allows you to meter audio level and signal strength. An LED indicator even lets you keep an eye on the transmitter's remaining battery life. The unit offers 1/4" and XLR connectors with adjustable output level for flexible connectivity to PA systems and mixing boards.
Specs
Receiver
| Receiver Type |
Rackmount |
| Mounting Options |
Rackmount (with Included Hardware) |
| Rackmount Size |
1 RU (1/2 Rack) |
| Antenna |
2 x 1/4 Wave External, Detachable (Rear-Mount) |
| Number of Audio Channels |
1 |
| Audio I/O |
1 x XLR 3-Pin Male Balanced Output
1 x 1/4" TS Female Unbalanced Output |
| Audio Output Level |
XLR Output:
-20.5 dBV (Mic Level)
1/4" Output:
-13 dBV (Instrument Level) |
| Frequency Response |
50 Hz to 15 kHz (Dependent on Mic) |
| Impedance |
XLR Output:
200 Ohms
1/4" Output:
50 Ohms |
| Approximate RF Sensitivity |
-105 dBm |
| Adjacent Channel Isolation |
>50 dB |
| Power Requirements |
AC/DC Power Adapter |
| AC/DC Power Adapter |
12 to 15 VDC at 260 mA, Center-Positive (Included) |
| Display & Indicators |
1 x Backlit LCD (AF Level, Channel, Group, Metering, RF Level)
1 x LED (Transmitter Battery Status) |
| Housing |
Steel |
| Operating Temperature |
0 to 135°F / -17 to 57°C |
| Dimensions |
7.8 x 2 x 6.4" / 198 x 50 x 163 mm (without Mounting Hardware, Antennas) |
| Weight |
35.2 oz / 998 g |
Transmitter
| Wireless Technology |
Analog UHF |
| Number of RF Channel Frequencies |
123 |
| Diversity |
Antenna Diversity |
| RF Frequency Band |
H9:
512 to 542 MHz |
| RF Bandwidth |
24 MHz |
| RF Channel Scanning |
Auto-Scan |
| Max Operating Range |
300' / 91.4 m (Line of Sight) |
| Max Transmitters per Band |
12 |
