(2) SA-15 D4 Classic - Sundown Audio 15 750W Dual 4-Ohm SA Series Subwoofers. The SA series was designed to be an excellent sounding subwoofer that is equally at home sealed or ported. We feel that the SA series is one of the best woofers available in it's price category and will satisfy the needs of a wide variety of users ranging from bass-heads to audiophiles! The SA series is also gaining popularity in SPL competitions due to their excellent voice coil cooling and rugged, durable constructions with several customers achieving output well over 150 dB!
Overall Diameter w/ Gasket: 15 5/8. 19.0mm XMax by 70% BL method oneway (38.0mm peak to peak). Thick black anodized aluminum voice coil formers for maximum strength and heat dissipation.4layer copper high temperature voice coil windings with 45mm winding length. Double layer permanently bonded high strength Nomex spider pack for maximum longevity and durability. Thick flat tinsel lead wires tied down to the spider to prevent lead noise and breakage.
Custom tooled triple joint support ring. Custom tooled frame spacer / ventilation ring. High efficiency airflow management integrated into the motor for maximum voice coil cooling. Dual Aluminum Faraday rings for reduced inductance and inductive distortion (pole cap and magnet ID). Recommended Box Specs (Sealed): 2.5ft^3 (Yields F3 of 41Hz).
Recommended Box Specs (Ported): 3.5ft^3 (Tune to 35Hz, Yields F3 of 28Hz). Specifications are measured after about 5 minutes of break-in time.
You will see the CMS loosen up another 33% after some serious play time, which will both reduce the FS and Qts figures of the drivers. Some Re variance is shown based on coil temperature from break-in period. D2 is closer to 4.0 in series and D4 7.0 in series at room temperature.This does not affect box calculations. Box specifications are suggestions other volumes and tunings can be used based on the needs of your application. The SA series woofers are compatible with most quality pre-fabricated enclosures as well. They also lend themselves favorably to fourth order band-pass enclosures. You will be issued a Return Authorization Number. In order to maintain an inventory of 100%, Brand New, A-Stock, untouched products, all sales are final. We ask that you please be sure you are ordering the correct product.
The item "(2) SUNDOWN AUDIO SA-15 D4 CLASSIC 15 750W RMS DUAL 4-OHM SUBWOOFERS SPEAKERS" is in sale since Thursday, November 19, 2020. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Other Vehicle Electronics". The seller is "woofersetc_outlet" and is located in Los Angeles, California. This item can be shipped worldwide.