Odd radio interference after sub install

Half_ton · August 5, 2018

ok fellas I am stumped and so is my cousin whom has worked in the audio industry for over 25 years.

I had this for a few years and it blew and my second one did as well.

https://www.crutchfield.com/p_500SBRS84/Alpine-SBR-S8-4.html?tp=112&awkw=75640521625&awat=pla&awnw=g&awcr=47621715145&awdv=c&awug=2840&gclid=EAIaIQobChMIrrOOj-_W3AIVi-NkCh2_SwitEAQYAiABEgJ2M_D_BwE

I started to read up on them more and it seems many had the same issue, even running my kicker 600 watt amp with the gain up only a quarter and tuned by my cousin as well.

I now purchased this with his discount https://www.cartoys.com/diamond-audio-dpas10

due to it being powered, quality, and small it seemed like the best thing. He hooked it up for me and it sounds amazing while on bluetooth or USB/line on on any phone. Our issue is when I try to listen to any radio station. When the bass hits even a little I get distortion and what sounds like a blown speaker. I had wired up my own line out converter behind the drivers B pillar and he thought that was the issue. He then ran wires to the front to get a high level output from the right of the glove box.

Still happens. Turned the gain almost all the way down- still happens. Got a converter to go from his iPhone to RCA's and tried that- still happens. Unplugged remote gain knob- still happens. WTH....

He plans to call Diamond tomorrow when they're open but I'd figure I'd ask here first as its 97* with 80% humidity and I dont want to mess with it anymore.

Thanks in advance.

Csjumper2003 · August 5, 2018

What’s the rcas? Where is the ground? What kind of hi/lo you using? What model diamond audio amp

Sent from my iPhone using Tapatalk

Half_ton · August 5, 2018

Ground is good, he hooked up the hi to the front speaker, the sub i posted is a powered sub so the amp is internal.

Not sure what you mean about the RCA's, we tested with them from my line out converter and had a little distortion so he ran wires to the front for a high level output and bypassed the RCA's.

Csjumper2003 · August 6, 2018

Hi/lo converter tapped to the front hi’s and then an rca our to the amp internal or not should have rcas from hi/lo to amp. Asked what rcas as some feedback can come from them but also if the crossover is set too high on the amp then can cause that type of issues.

Sent from my iPhone using Tapatalk

Half_ton · August 6, 2018

2 minutes ago, Csjumper2003 said:

Hi/lo converter tapped to the front hi’s and then an rca our to the amp internal or not should have rcas from hi/lo to amp. Asked what rcas as some feedback can come from them but also if the crossover is set too high on the amp then can cause that type of issues.

Sent from my iPhone using Tapatalk

we used oxygen free speaker wire to run to the amp as this amp allows it, so we don't have any RCA's in equation right now.

Why would it sound fine on USB or Bluetooth and then like garbage on the radio?

Csjumper2003 · August 6, 2018

Well I’ve noticed it seems the radio signals in these trucks aren’t exactly good. The RCA through the hi/lo is a better signal. If you take out the amp does the radio work better with a solid signal?

Lastly. Hi/lo’s are made to run off 2 speakers. Well the good ones anyways, wth a remote but is made to turn speaker wires into a rca connection. Why would you run a speaker wire from amp to that wire? You need to connect the wires for hi/lo onto stock wires. Behind radio is usually easiest. Then run rcas from there to amp.

Sent from my iPhone using Tapatalk