Featured Need help with feedback.

[Steven Lature]

I've got a 2023 Ram 5500 cab and Chassis and it's got the Factory six speaker 8.4 in Uconnect 5 screen all Factory.. I've added an Alpine 450 mono amp powering a 12-in audiopipe. I've replaced the front door speakers with nvx 6.5 in component speakers with tweeters... I've got the LC2i being connected to the left and right rear door speakers to get the low input to power the subwoofer. Powering my front two door speakers is the Kenwood kac-314.. I'm getting horrible feedback from the subwoofer pulsating sounds sometimes long humming sounds how can I stop this... I posted a Pic of the set up, it's not fully done so excuse the bad wiring I forgot to mention that I had to use an aftermarket base knob so the RCA runs from the lc2 up to the base knob and then back to the amp and I've got that done twice one for the doors for the highs and meds and then for the sub

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[1aespinoza Premium Member]

the Kenwood kac-314.. I'm getting horrible feedback from the subwoofer pulsating sounds sometimes long humming sounds how can I stop this... I

Does the Kenwood have output RCAs. If yes, plug the Alpine to those and see if the sound persists. If it does, disconnect from the Kenwood and connect your phone to it via 3.5mm to RCA cable.

 

[1aespinoza Premium Member]

it's not fully done so excuse the bad wiring

Question; why does the LC2i have blue RCAs on the bass output, but red & white RCAs into the Alpine amp?
I would also clip or tape those input wires on the Kenwood. They could cause issues if grounded.

 

[Steven Lature]

Question; why does the LC2i have blue RCAs on the bass output, but red & white RCAs into the Alpine amp?
I would also clip or tape those input wires on the Kenwood. They could cause issues if grounded.

They're just two different RCA wire brands that I grabbed and I took those input wires off

 

[Steven Lature]

I forgot to mention that I had to use an aftermarket base knob so the RCA runs from the lc2 up to the base knob and then back to the amp and I've got that done twice one for the doors for the highs and meds and then for the sub

 

[Steven Lature]

Does the Kenwood have output RCAs. If yes, plug the Alpine to those and see if the sound persists. If it does, disconnect from the Kenwood and connect your phone to it via 3.5mm to RCA cable.

The Kenwood only has a and b inputs for each Channel it's a 4-channel amp

 

[1aespinoza Premium Member]

The Kenwood only has a and b inputs for each Channel it's a 4-channel amp

Let's try connecting the RCAs from the Kenwood to the Alpine. If the noise persists, then the Alpine is to blame.

 

[Steven Lature]

I've grounded everything better and gotten feedback down to a minor pop when the truck shuts off

 

[1aespinoza Premium Member]

I've grounded everything better and gotten feedback down to a minor pop when the truck shuts off

Nice. I was suspicious of the Alpine since the Kenwwood was not doing the same even though they were on the same signal supply. Now we can add this grounding as a possible solution to that periodic ticking and hum.