SM-90
160 CHANNEL WIRELESS STEREO MONITOR SYSTEMS
Based on the SM-80, in March 2008, the new generation in-ear monitoring system SM-90 is born.
It is in smaller size but including many efficiency functions, the sound quality is much improved.
This is the second generation in-ear monitoring system.

10 per-set groups.Altogether 160 optional UHF Bands.
16 frequencies work simultaneity in the same band and
do not interfere.
No limit of  the receivers, infinite receivers can operate in the
same band.
LCD shows clear working status.
Optional stereo and mono modes.
Field strength and noise measure double, squelch quantum
adjustment control,efficiently improve the preventing of noise
interference in the environment.    

SM-90T  (Transmitter)
Technical data
Frequency range.............................................580~870MHz
Max channel number.......................................................160
Switching bandwidth..................................................24 MHz
Modulation..............................................wideband FM stereo
RF output power.........................................................10 mW
Squrious Rejection..................................................> 50dBc
Peak deviation......................................................+/- 40KHz
Frequency response........................................60~16000 Hz
Signal-to-noise ratio.................................................85 dB(A)
THD...........................................................................<1 %
Input voltage range...............................................20dBV max
Power supply.......................................12~18 V DC / 400mA
Dimensions....................................................200x96x44 mm
Weight..............................................................900g

SM-90R  (Receiver)
Technical data
Frequency range............................................580~870MHz
Max channel number...............................................160
Switching bandwidth...............................................24MHz
Modulation............................................wideband FM stereo
Stereo channel separetion.........................................>42dB  
Sensitivity...............................<-94dBm for 30dB S/N Ratio
Peak deviation.....................................................+/- 40KHz
Frequency response.......................................60~16000 Hz
Signal-to-noise ratio(stereo mode)........................>80dB(A)
THD.................................................................<1%
Dynamic Range........................................................>95dB
Headphone connector..............................3.5 mm jack socket
Audio output level.............................................100mW max
Power supply.....................................................2x1.5 V(AA)
Operating time............................................................>6 h
Dimensions....................................................90x65x24 mm
Weight............................................................90g