Alpine Electronics of America is one of the world’s leading manufacturers of high quality mobile electronics systems and the Type-R and Type-S series of speakers were the company’s best-selling models. Key differences between these two models include power output, frequency response, tweeter size and woofer types.
Alpine’s Type-R series speakers are generally more powerful than Type-S speakers. The Type-S speakers have a power handling capacity range of 45 to 85 watts, with peaks at 140 to 260 watts, while the Type-R speakers' range is from 90 to 110 watts, with peaks at 270 to 330 watts.
Alpine’s Type-S speakers’ frequency response peaks at 22 to 23 kHz while Type-R speakers’ frequency response peaks at around 27 kHz. There is not much difference between the two series’ impedance -- 3.6 to 4 Ohms -- and sensitivity ratings, 86 to 90db /W(1m).
The tweeter is the component of a speaker that processes treble or high frequencies. In Alpine’s Type-S series, the tweeters are 3/4- to 1-inch wide-range silk-dome tweeters, while the Type-R series tweeters are 63/64- to 1-inch bright, crisp ring tweeters. Some Type-R tweeters also offer resonance absorbers. All of the speakers from both series, except for the SPS-609, have swivel-type tweeters that feature an ultra-low magnet distortion design.
The woofer processes bass or low frequencies. Alpine’s Type-S series speakers offer woofers with poly-mica cones, optimized magnet motor technology, square wire short voice coils, and stamped steel shallow frames. Alpine’s Type-R series speakers feature woofers with varnish multi-layer cones, linear drive motor technology, large square-wire short-voice coils and rigid custom-cast aluminum frames. Type-R speakers’ woofers also have dustcaps reinforced with Kevlar. All of the woofers in both series use high-grade strontium magnets and a shallow mounting design.
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