I asked this in my Build Thread, but it may go unnoticed there...
Vehicle - 2016 Ram Crew Cab
Using factory 8.4 Uconnect (non-alpine)
Axxess AX-DSP-CH5 T-Harness
Hertz MLK Mille Legend 165.3 Components (front)
Hertz MPX Mille PRO's 165.3 Coaxial (rear doors)
JL Audio FiX 82
JL Audio TwK D8
Rockford Fosgate Power T400X4ad
Rockford Fosgate Power T750/1bd
Alpine R-Series R-W12D4
I need a little assistance. All equipment was purchased new from authorized dealers. Installed by professional installer with 30 years experience.
There may be something wrong with either my FiX or TwK. When I first turn the system on, it's PERFECT. No noise whatsoever. Just perfect silence, at all volumes, until I send a signal from Bluetooth or some other source. I've tested for the absence of any noise with the engine running and off. I've paused the signal and turned the volume up all the way on the DRC-200 and there is absolutely zero background or electrical noise. THEN...after about 15 minutes, a faint electrical sounding "hiss" starts. It's a constant hiss and increases in volume as I turn up the DRC-200 or turn up the gains on my front stage amp. The subwoofer signal is clean with no noise at any volume. Signal is ran from the HU to the FiX then optically to the TwK. Analog signal is then fed to the amps. The DRC-200 controls the gain of the TwK. My HU volume was set at 34 out of 38 when the TwK was tuned. My amps were level matched using JL set up disk.
It's important to note that the hiss (sounds like electrical feedback maybe) is not present for approximately 15 minutes, then just magically appears. It doesn't matter if I'm driving or just sitting in the driveway. My installer believes the noise originates before the amps.
I'm leaning towards something being wrong with either the FiX or TwK. It's almost like something internal warms up, and causes the feedback. I can turn the truck off and come back after an hour or so and the noise is gone, but comes back like clockwork after about 15 minutes. This further leads me to believe that whatever is causing the noise cools down and doesn't cause issues until it heats back up.
I've read numerous threads about noise with the FiX or TwK, but no one else seems to report that the noise only starts after a few minutes of playing the system. My installer is at a loss. He's installed these items countless times and states that he hasn't seen another example of the signal being all but perfect like mine and only developing an issue after a few minutes of use.
I don't want to let this go for long in case I need to send something back to be replaced.