The model 307B external communications speaker is designed for use with Ten-Tec radio receivers and transceivers. The 307B is a black cabinet as used for the Orion, Orion II, and Argonaut V HF transceivers, Omni-VII and the RX-350D receiver. The cabinet and speaker are suitable for every possible communcation need, from clean CW operation to well-rounded AM receive audio. The speaker response is 100 to 18000 Hz, 4 ohms impedance, 5 watts power. Speaker measures 4 inches diameter. Out of stock – shipping again approximately August 15, 2009.