1993 Pro SPP Subwoofers - data sheets

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Here are Thiele/Small data-sheets for the 1990 lineup of Pro subwoofers:

SPP-84 = Pro 8" 4-Ohm Subwoofer [Download T/S Data Sheet]
SPP-88 = Pro 8" 8-Ohm Subwoofer [Download T/S Data Sheet]

SPP-104 = Pro 10" 4-Ohm Subwoofer [Download T/S Data Sheet]
SPP-108 = Pro 10" 8-Ohm Subwoofer [Download T/S Data Sheet]

SPP-124 = Pro 12" 4-Ohm Subwoofer [Download T/S Data Sheet]
SPP-128 = Pro 12" 8-Ohm Subwoofer [Download T/S Data Sheet]

SPP-154 = Pro 15" 4-Ohm Subwoofer [Download T/S Data Sheet]
SPP-158 = Pro 15" 8-Ohm Subwoofer [Download T/S Data Sheet]

SPP-184 = Pro 18" 4-Ohm Subwoofer [Download T/S Data Sheet]
SPP-188 = Pro 18" 8-Ohm Subwoofer [Download T/S Data Sheet]