SPECIFICATIONS
SYSTEM
Working Range
91 m (300 ft) Line of Sight
Note: Actual range depends on RF signal absorption, reflection and interference.
Audio Frequency Response
50 to 15,000 Hz
Note: Dependent on microphone type
Total Harmonic Distortion
Ref. ±33 kHz deviation with 1 kHz tone
0.5%, typical
Dynamic Range
100 dB, A-weighted, typical
Operating Temperature
-18°C (0°F) to 57°C (135°F)
Note: Battery characteristics may limit this range.
Polarity
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.
BLX1
Audio Input Level
| max | -16 dBV maximum |
| min (0 dB) | +10 dBV maximum |
Gain Adjustment Range
26 dB
Input Impedance
1 MΩ
RF Transmitter Output
10 mW, typical
varies by region
Dimensions
4.33 in. X 2.52 in. X 0.83 in. (110 mm X 64 mm X 21 mm) H x W x D
Weight
2.6 oz. (75 g), without batteries
Housing
Molded ABS
Power Requirements
2 LR6 AA batteries, 1.5 V, alkaline
Battery Life
up to 14 hours (alkaline)
BLX2
Audio Input Level
| 0dB | -20 dBV maximum |
| -10dB | -10 dBV maximum |
Gain Adjustment Range
10 dB
RF Transmitter Output
10 mW, typical
varies by region
Dimensions
8.82 in. X 2.09 in. (224 mm X 53 mm) L x Dia.
Weight
7.7 oz. (218 g) without batteries
Housing
Molded ABS
Power Requirements
2 LR6 AA batteries, 1.5 V, alkaline
Battery Life
up to 14 hours (alkaline)
BLX4
Output Impedance
| XLR connector | 200 Ω |
| 6.35 mm (1/4") connector | 50 Ω |
Audio Output Level
Ref. ±33 kHz deviation with 1 kHz tone
| XLR connector | –27 dBV (into 100 kΩ load) |
| 6.35 mm (1/4") connector | –13 dBV (into 100 kΩ load) |
RF Sensitivity
-105 dBm for 12 dB SINAD, typical
Image Rejection
>50 dB, typical
Dimensions
1.57 in. X 7.40 in. X 4.06in. (40 mm X 188 mm X 103 mm) H x W x D
Weight
8.5 oz. (241 g)
Housing
Molded ABS
Power Requirements
12–15 V DC @ 235 mA (BLX88, 320 mA), supplied by external power supply (tip positive)
BLX88
Output Impedance
| XLR connector | 200 Ω |
| 6.35 mm (1/4") connector | 50 Ω |
Audio Output Level
Ref. ±33 kHz deviation with 1 kHz tone
| XLR connector | –27 dBV (into 100 kΩ load) |
| 6.35 mm (1/4") connector | –13 dBV (into 100 kΩ load) |
RF Sensitivity
-105 dBm for 12 dB SINAD, typical
Image Rejection
>50 dB, typical
Dimensions
1.50 in. X 12.13 in. X 3.98in. (38 mm X 308 mm X 101 mm) H x W x D
Weight
15.1 oz. (429 g)
Housing
Molded ABS
Power Requirements
12–15 V DC @ 235 mA (BLX88, 320 mA), supplied by external power supply (tip positive)
30-Days Buyer Protection 
