The PIONEER AS-305A is a 'do-it-yourself kit for a custom 12-inch 3-way 5-speaker system for use in high fidelity sound systems. It is comprised of carefully-matched units chosen from PIONEER’S extensive range of quality speakers, put together in an compact system for high fidelity sound reproduction. 12-Inch Woofer (Model PW-301A) This is a unit mounting an extremely powerful magnet assembly, designed especially for use in compact enclosures. The cone and voice coil are based upon new conceptions in audio engineering, to provide efficient operation with minimum of distortion. Designed with ample reserve for peak low frequency signals, the PW-301A provides crisp and well-damped low frequency reproduction. 5-lnch Squawker (Model PM-122A) The outstanding transient response of this unit is virtually unprecedented in cone type units available heretofore. Through the use of precision-finished acoustic elements and a powerful magnet assembly, it has an extremely high efficiency factor. In addition, to prevent interference with the other units of the system, the rear of the unit, including the magnet yoke, is completely enclosed. Tweeters The tweeters used number three in all. They include the horn type Model PT-2K, which provide silky clear highs extending well into the ultra-sonic ranges, and two cone type Model PT-257A units, for full dispersion of sound. Between these three tweeters, superb high frequency reproduction is provided. The crossover network is already assembled in a single unit incorporating the level controls and is fully wired, so that all that has to be done is connect the output terminals to their respective speaker units. This will provide precise and sharp division of the audio spectrum for feeding each segment to the proper speaker unit. The construction of the enclosure is where your skill proves its merit. Study the instruction carefully before putting your enclosure together, and outstanding performance and tonal quality is yours.