Crazy 8s Drums Posted June 18, 2018 Report Share Posted June 18, 2018 Just reducing the variables here. BCBrassard asked the next logical step, your amp gains being set. You stated that you had check RCAs, did you do this by switching to a different set? Are your RCA cables shielded? If a power cable is run through your car alongside unshielded RCAs the power cable can induce noise into the RCAs. This would most likely show up with the hiss changing with volume changes but could perhaps not. The next step would be the amp grounds...make sure they are clean...and at least as girthy as the positive going in the amp. 4g in should have atleast 4 ga out, for example. The connection needs to be tight and corrosion-free. I am guessing you have done 'the big three' too, check those connections for corrosion...just to eliminate potentials. With the HU at 0 volume, check again to hear if amplifier gain change alters the hiss volume. Eliminating variables... Orion XTR amplifiers Skar subs Link to comment Share on other sites More sharing options...
Crazy 8s Drums Posted June 18, 2018 Report Share Posted June 18, 2018 Check to see if it the hiss is out of the coaxials or the components or both...fade back and front. I might blame the amp, but you said you are on the second one and both had the hiss. Perhaps the x-over for the components is having troubles? It is hard to know without the car being in front of us. Orion XTR amplifiers Skar subs Link to comment Share on other sites More sharing options...
krazz619 Posted June 18, 2018 Author Report Share Posted June 18, 2018 I got KnuKonceptz Kolossus Flex RCAs and they are routed on the opposite side of power wires (I learned this when I did my first sound system haha) The Big 3 is 0 gauge Soundqubed 0gauge, both amps have 4 gauge power wire bot hOFC, and 4 gauge ground wires connected to the 2+2 fused blocked with a 0gauge wire connected to the car for ground. Volume level and gain level does not effect the hiss no matter what. Once the amp has power and is on, and a speaker is connected, the hiss is there. The hiss comes from all 4 corners, and its a lot louder from the rear coaxials compared to the front components (which i notice the hiss from the midrange and tweeter) Honestly guys, I believe its the amp itself causing it. Some internal parts somewhere like a noise filter or something is doing it. So I think its normal for this amp and I have to deal with it until I get a different type of amp. 2015 Scion tC DieHard AGM Battery, Stock Alternator, with Big 3 Alpine CDA-105, Hertz Energy 6.5" 3 Way Components, Skar TX65 Coaxials Rockford Fosgate T2D215 Skar RP-1500.1D and RP-150.4AB Link to comment Share on other sites More sharing options...
06RTCharger Posted June 18, 2018 Report Share Posted June 18, 2018 Have u tried hooking up another speaker to that amp just to isolate the issue being at the amp. Because if u disconect rcas and its still hissing that means the headunit is not even connected to it in anyway, so the headunit doesnt matter. Link to comment Share on other sites More sharing options...
krazz619 Posted June 18, 2018 Author Report Share Posted June 18, 2018 (edited) 7 minutes ago, 06RTCharger said: Have u tried hooking up another speaker to that amp just to isolate the issue being at the amp. Because if u disconect rcas and its still hissing that means the headunit is not even connected to it in anyway, so the headunit doesnt matter. I do have stock speakers I can try hooking up, but yes the headunit does not matter. When I test another speaker I'll come back here Edited June 18, 2018 by krazz619 2015 Scion tC DieHard AGM Battery, Stock Alternator, with Big 3 Alpine CDA-105, Hertz Energy 6.5" 3 Way Components, Skar TX65 Coaxials Rockford Fosgate T2D215 Skar RP-1500.1D and RP-150.4AB Link to comment Share on other sites More sharing options...
Edlarciaga Posted May 17, 2020 Report Share Posted May 17, 2020 I know this is old but I have the same problem. It hisses but when I lower gain it goes away . But low enough where no issues but low sound. Lol. It’s the coaxials. Don’t have issue with my components. Link to comment Share on other sites More sharing options...
Basshead199789 Posted May 18, 2020 Report Share Posted May 18, 2020 (edited) I have same amp running a set of spx65c rn ans no noise have it all ran with certified basshead rcas splitters and a illestaudio rca splitter box. Sometimes when i get my rca and converter box close to power lines ill get a intwrference but i have my amp deck set up to keep things a little spread apart. Also i am running 1/0 guage into ground and power of skar rp 150 with 4gauge adapters Edited May 18, 2020 by Basshead199789 Link to comment Share on other sites More sharing options...
Recommended Posts