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The Simplex SH-1000, also called the Simplex Four Star, is a direct drive soundhead originally introduced with the E-7 line of projectors in the 1930s. It was replaced by the X-L series soundheads, which are very similar to the SH-1000 but have a compartment below the exciter lamp to house a preamp. The SH-1000 remained popular long after the introduction of Simplex's belt-driven soundheads, which are generally considered inferior to the | The Simplex SH-1000, also called the Simplex Four Star, is a direct drive soundhead originally introduced with the E-7 line of projectors in the 1930s. It was replaced by the X-L series soundheads, which are very similar to the SH-1000 but have a compartment below the exciter lamp to house a preamp. The SH-1000 remained popular long after the introduction of Simplex's belt-driven soundheads, which are generally considered inferior to the earlier direct drive models. | ||
==Threading== | ==Threading== |
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