A model instrumentation design technique and construction of a 120W, 8Ω, MB2X output transducer system

Abstract

The Physics of electronic instrumentation and experimental techniques was studied and the design and construction of an output transducer (loudspeaker system) called MB2X rated 120W, 8W were conducted experimentally. The design incorporated a 12” woofer, 2 tweeters and a simple cross-over circuit using locally available and affordable materials and components.
Discrete components like, resistors, capacitors (10 mf) and an inductor were used in the construction of the cross-over circuit. Also used for the testing, reliability and specifications of the MB-2X output transducer system are a signal generator, multimeters and an oscilloscope.
Other materials like plywood, wood gum, nails, thick foam etc. were used for the speaker casing and cabinet. On testing and reliability, the MB2X has an operating bandwidth of 60Hz to 7.5KHz at ±2dB amplifier headroom with a minimum usable frequency of 53Hz.


Keywords:Instrumentation systems, output transducer, loudspeaker

Nigerian Journal of Physics Vol. 18 (1) 2006: pp. 73-80