Shure BLX14R/MX53 Wireless Rack-Mount Presenter System with MX153 Earset Microphone (H10 Band)

Shure BLX14R/MX53 Specifications:

System
Working Range: 91 m (300 ft) Line of Sight (Actual range depends on RF signal absorption, reflection and interference.)
Audio Frequency Response: 50 to 15,000 Hz (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) (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)

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)

BLX4R
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)

MX153
Transducer Type: Electret Condenser
Polar Pattern: Omnidirectional
Frequency Response: 20 to 20,000 Hz
Output Impedance: N/A
Sensitivity open circuit voltage, @ 1 kHz, typical: -41 dBV/Pa ^[1] (9 mV/Pa)

Maximum SPL (1 kHz at 1% THD ^[2])
2500 Ω load: 107 dB SPL
1000 Ω load: 107 dB SPL

Signal-To-Noise Ratio ^[3]: 60 dB

Dynamic Range @ 1 kHz
2500 Ω load: 73 dB
1000 Ω load: 73 dB

Self Noise (equivalent SPL, A-weighted, typical): 34 dB
Common Mode Rejection (20 to 20,000 Hz): N/A
Operating Temperature Range: -18°C (0°F) to 57°C (135°F)
Polarity: Positive pressure on diaphragm produces negative voltage on pin 3 with respect to pin 1.
Power Requirements: +1–5 V DC (500 µA max.)
Weight: 19.76 g

^{[1] = Pa=94 dB SPL
[2] = THD of microphone preamplifier when applied input signal level is equivalent to cartridge output at specified SPL
[3] = S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted}

Each BLX14R/MX53 Retail Box Includes:

(1) BLX1 Bodypack Transmitter
(1) BLX4R single-channel rack mount receiver
(1) MX153 earset microphone
(1) Protective storage pouch
(3) Windscreens
(1) Collar clip
(1) 53A8611 Rack Mount Bracket
(1) 53A8612 Long Rack Mount Bracket
(1) 53B8443 Link Bracket
(1) 90AZ8100 Hardware Kit
(1) 31B1856 Thread Adapter
(2) 95A8699 Antenna/BNC,1/4 Wave
(2) 95A8994 Adapter, Bulkhead, BNC
(1) 95B2313 Bag Vinyl, Zippered
(2) 95K2035 Cable, BNC, 22"
(1) PS24 Power Supply
(2) AA batteries
(1) User Guide