This stereo encoder is the perfect solution for those who are looking for a great stereo sound with a low cost. This stereo encoder outputs is a very clean and nice sound which is still be cheaper than having each of the equivalent expensive stereo encoder. This stereo encoder uses a Quartz crystal to control the 19 kHz pilot tone, so you will never need to re-adjust it. This is only adjustment required on audio input levels.

STE-10012 Manufacturer: RF Application Co., Ltd. Product Name: Stereo Encoder Model # : STE-10012 Price: $178.00     Data Sheet       Product Features Suitable for FM Exciter/Transmitter Balanced audio input Build in high quality stereo encoder Audio input Level adjustable Build in 15KHz filter Build in limiter ON/OFF High quality audio SMD design MPX level output      Technical Specifications  Physical and Environmental Specifications  Audio limiter control Microprocessor   General Stereo Exciter ModulaPon limiter +- 75 KHz adjustable   Operating Temperature -10°C to +50°C (+14°F to +122°F)   (Limiter ON)   DC input requirement 13-18 Volts@0.5A Audio input type Balance (standard solder tab)   Size 8.8 X 15.0 X 5.2 cm. (W x L x H)  Audio frequency response  10Hz – 15KHz    Weight  0.25 Kg.  Audio input impedance  10KHz        Audio input level  -6dB to +12dB        adjustable       Stereo S/N FM ratio  >65 dB         (@+- 75 KHz deviaPon)        Pre emphasis  50us         (0us or 75us on request)       Channel separation  >45dB       MPX output connector  unbalance         (standard solder tab)