Every car interior produces at least one sharp peak or dip in the frequency response that results in highly unnatural sound reduction. But the exact frequency and its level of intensity depends on unpredictable factors such as the size and volume of the interior, type of material used for the interior (i.e. cloth, leather, vinyl), whether a window is open, or how many passengers are onboard.
Cadence products are covered by warranty from defects in materials and workmanship for a period of one year if the unit is not installed by an authorized Cadence dealer and two years if installed by an authorized Cadence dealer. Proof of purchase is required for warranty repair; and proof of professional install for two year extended warranty. Warranty is to the original purchaser only. All products not under warranty are subject to a repair charge.