Sundown Car Audio 2000W Peak Dual Voice Coil X v. 4 series is the entry into the Sundown Audio "ultra-high excursion" suspension and frame designs. They all feature our custom tooled and patented frames (US Patent Numbers D691596, D691597, D691598, and D741841). We mate these new platforms to a triple stacked 225mm (8.86") diameter motor structure featuring a hyper-extended pole and extreme clearances (allowing up to 4" p-p travel before mechanical bottom).This motor drives a 3 diameter 4-layer flat aluminum coil wound on a thick aluminum former to incredible levels of excursion. This is the same coil design utilized in the NS v. 5 series in the past. The combination of coil and updated motor for the X v. 4 series brings its performance in terms of motor force to about 85% of the level of the previous generation Z v. So this makes the X v. 4 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 the same small enclosures that you are used to using for Sundown Audio subwoofers, although, the will tolerate enclosures up to about 50% larger than those if you desire even more low-end extension. 4 series is really a different kind of woofer due to its incredibly linear suspension.
They are designed for the LOWEST level of bass extension possible in a small enclosure while maintaining extremely low levels of distortion. T/S Specifications 10 D1 / D2. RE (Ohms): 1.4 / 3.2. FS (Hz): 39.104 / 40.208. VAS (L): 11.623 / 9.352.
Qes: 0.441 / 0.528. Qms: 2.567 / 2.842. Qts: 0.376 / 0.445. Le (mH): N/A / N/A. BL (NA): 14.155 / 21.509.
Mms (Grams): 256.970 / 302.089. Cms (uM/N): 64.465 / 51.867. T/S Specifications 12 D1 / D2. FS (Hz): 37.098 / 37.235. VAS (L): 12.986 / 17.077.Qes: 0.486 / 0.543. Qms: 2.597 / 2.779. Qts: 0.409 / 0.454.
BL (NA): 15.943 / 19.857. Mms (Grams): 378.626 / 285.817.
Cms (uM/N): 48.611 / 63.922. T/S Specifications 15 D1 / D2. FS (Hz): 31.418 / 31.423. VAS (L): 45.907 / 45.924. Qes: 0.486 / 0.561.
Qms: 2.562 / 2.801. Qts: 0.409 / 0.468. BL (NA): 15.518 / 21.831. Mms (Grams): 423.721 / 423.436. Cms (uM/N): 60.563 / 60.585.T/S Specifications 18 D1 / D2. FS (Hz): 26.650 / 28.207.
VAS (L): 130.302 / 109.935. Qes: 0.526 / 0.657.
Qms: 2.793 / 3.091. Qts: 0.442 / 0.542. BL (NA): 14.543 / 20.854. Mms (Grams): 474.114 / 504.115.Cms (uM/N): 75.224 / 63.154. Check Us Out On All Social Media Platforms /BigJeffAudio. Please make sure to box up product in original boxes and all paperwork and parts. Speakers with Burnt Coils or frozen up or physical damage will not be accepted. Amplifiers that have been smoked from improper use will not be accepted.
(Boxes, Packing, Instructions, ETC) Everything we sent needs to come back. No physical damage will be accepted!!!