The IMF Electronics HPCM does not refer to some exotic new type of Pulse Code Modulation, but designates our new High-Performance Control Monitor loudspeaker. However, the allusion to PCM is entirely appropriate since digital sound was a vital tool in the development of our HPCM loud speaker.
Our design goal was a compact loudspeaker that could cope with the extended frequency response, high power-handling requirements, and wide dynamic range of digital recording. In short, we wanted a compact version of our IMF Electronics Reference Standard Professional Monitor Mark VII.
In fact, the HPCM uses the same 11 3/4 inch x 8 1/4 inch, high stiffness/low mass, styrene/ fiberglass woofer of the Mark VII, which affords true piston-action bass response, and a polymer-cone mid range and chemical dome tweeter, both of which are damped with Ferro-fluid. These drivers are mounted in an inline configuration in a 26.8 inch H x 14.8 inch D x 11.6 inch W sealed enclosure. The enclosure is constructed of epoxy-impregnated heavy particle board. This extremely rigid and virtually inert material along with heavy internal damping in the enclosure, minimizes resonant colorations. The edges of the enclosure are beveled to attenuate diffraction radiation. The in-line drivers and a third-order crossover network maintains phase integrity and affords precise and stable stereo imaging.
The minus 3 dB point of the HPCM is 37 Hz, and this provides exceptional extended bass reproduction from the new CD digital discs now on the market. The HPCM gives the smooth, clean, highly-detailed sound at high power levels that characterizes the IMF Electronics Reference Standard Professional Monitor Mark VII in a compact, no-compromise, cost effective system. Audition the remarkable IMF Electronics High Performance Control Monitor at selected dealers.
IMF ELECTRONICS, INC. 5226 State Street Saginaw, Michigan, 48603. Tel (517) 790-2121 Telex 227461
(Source: Audio magazine, Jul. 1983)
Also see: H.H. Scott, Inc. loudspeakers (Oct. 1977)
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