Hitone Electronics offers 4 Channel Mixer Pre-Amplifier. Hitone Electronics is an ISO 9001:2000 accredited company. The Company also manufactures various types of Amplifier, Cassette Player, Microphones and Speakers etc. The 4 Channel Mixer Pre-Amplifier, Model KM-04, has power source from 9V battery. The 4 Channel Mixer Pre-Amplifier has frequency ranging from 20 to 20,000 Hz. The 4 Channel Mixer Pre-Amplifier has output of 200mV/600 ohms. This Pre-Amplifier has dimension of 160mmX60mmX95mm. This Pre-Amplifier has weight of 690 gms.