B&C DE38 1" Neodymium Mylar Horn Compression Driver 2-BoltB&C's smallest high performance 1" horn driver ever, the DE38 1" features a low-mass Mylar diaphragm, aluminum voice coil, and optimized neodymium magnet assembly. Compact yet powerful, the neo motor's small size facilitates use in miniature speaker system designs, as well as providing a solution to the critical high frequency component spacing issues presented by line arrays. 1" horn throat diameter, 2-bolt mounting.
Specifications: • Power handling: 40 watts RMS/80 watts program above recommended crossover of 2 kHz/12 dB slope • VCdia: 1.5" • Impedance: 8 ohms • Frequency response: 1,500-20,000 Hz • SPL: 107.5 dB 1W/1m • Dimensions: 2.75" diameter x 2.2" depth • Net weight: 1.1 lb.
B&C Speakers' line of compression drivers is the result of a continuous research effort, dedicated to refine every component in the structure, and their overall balance. Diaphragms are made of titanium, mylar, or polyimide, in order to get the required results in efficiency and bandwidth. Their shape and structure is mathematically evaluated well before building the first prototype. Afterwards, their performance is tested with methods that range from modal analysis to laser vibrotomy.
All voice coils are of the edgewound ribbon type, and made of aluminum to reduce mass and achieve the best electro-acoustic performance. The magnet assembly is designed and optimized with up-to-date software for Finite Element Analysis (FEA) and complemented, where needed, by a copper cap to improve frequency extension and linearity.
Equal care is taken in the design of phase plugs, whose role in enhancing performance and reducing distortion artifacts is critical for compression drivers. The precision and transparency of B&C compression drivers is constantly improved by the progress in acoustical modeling and simulation.
B&C Speakers DE38 specifications 
California Prop 65