i might add that I've never used the DD-1 at 1khz. i have used it only for bass amps at the 40hz. i used it on my Lincoln, sequoia, my brother-in-laws tahoe, and most resent my brothers truck. they all have had aftermarket stereos this is the first time im using it for a stock head-unit and at 1khz. thanks for all yalls reply's and trying to figure this thing out. im going to get the DD-1 and CC-1 combo as soon as they come back in stock.