The Bogen Classic Series Models C10 and C20, offer dependable performance and flexibility. The C10 is rated at 10 watts. The C20 is rated at 20 watts. Both models are listed to UL Standard 60065 for US and Canada.The Classic Series is designed with discreet complementary transistor circuitry to assure maximum reliability of power output stages. The Bogen Classic Series Models C35, C60, and C100 are public address mixer amplifiers that provide mixing of microphones, telephone, and auxiliary sources. Output screw terminals are provided for 4-ohm (direct) and 8-ohm (C35 & C60 models only), 16-ohm, 25V and 70V (transformer-coupled) speaker systems. Output jacks let you connect to a tape recorder or an additional booster amplifier, or feed a 600-ohm telephone line when an accessory transformer (Model WMT1A) is used.