Pressure Gradient Ribbon TransducerFitted with a low mass damped ribbon, the Coles 4038 Ribbon Microphone helps to control transit responses minimizing distortion in any performance. COLES MICROPHONES - Studio ribbon. The most well-known are the legendary 4038 studio ribbon microphone, and 4104 and 4115 lip microphones. The 4038 Studio Ribbon Microphone is of British Broadcasting design (BBC) and used for broadcasting and recording such sounds where a clear smooth wide range frequency response, absent of transient distortion and relatively high sensitivity is essential.. Coles Electroacoustics is a very long established manufacturer of specialised microphones and other acoustic transducers. 4038 Studio Ribbon Microphone The 4038 Studio Ribbon Microphone is of British Broadcasting design (BBC) and used for broadcasting and recording such sounds where a clear smooth wide range frequency response, absent of transient distortion and relatively high sensitivity is essential. When you need a microphone with a wide frequency response, an absent of transient distortion, and a relativity high-sensitivity, the 4038 is the microphone for you. About: Coles 4038 Studio Ribbon Microphone. 4030L.