2 series was designed from the ground-up to become the new standard in the low-frequency / small ported box subwoofer category in this price range. They will work in anything from our traditional very small enclosures like the SA and Z v. 3 series up to about 50% larger than those suggestions for the maximum amount of low-frequency extension. 2 series is really a different kind of woofer due to it's incredibly linear suspension. They are designed for the LOWEST level of bass extension possible while maintaining low levels of distortion.
They are NOT a peaky SPL woofer -- these are true low distortion, high excursion bass transducers! Due to the extremely low level of suspension induced distortion the typical "punchy" upper-bass peak in the 40s-60s Hz range that occurs with traditional woofers when pushed to high excursion does not occur. This "punch" is caused by a tightening of the suspension over stroke leading to increased FS and Qts figures -- in other words it is distortion. In simpler terms -- the X series frequency response does not change much over it's full excursion range provided a consistant and flat response at any volume level. Once you experience and re-listen to all of your favorite music on a low distortion driver you are unlikely to go back!For customers after a more "traditional" sound we are developing a suite of "SPL" cones and spiders. These will retain as much of the high stroke of the stock suspension as possible but will increase the static FS and offer more suspension tightening over stroke. Ask your dealer about this option; which is coming in 2Q-3Q of 2014. Xmax = 30mm one-way by 70% BL. Recommended Port Area: 68 in^2. 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 X-15 V. 2 D4 SUBS 15 DUAL 4-OHM SUBWOOFERS BASS SPEAKERS NEW" is in sale since Wednesday, August 27, 2014. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Car Audio\Car Subwoofers". The seller is "woofersetc_outlet" and is located in Los Angeles, California. This item can be shipped worldwide.2 D4