Phoenix Gold Phorum

I was driving my pickup this morning and actually had the stereo muted for the first time since install - and noticed that I have a dang ALT whine!

Only on fronts - Subs are probably crossed over low enough it gets cut out.

Its volume doesnt change based on the volume knob - only engine speed changes the tone.

both amps and CAP are grounded to a single ground block

Deck is a newer (1yr old) Pioneer non-premier

Amp gains are around roughly 50%, slightly over

big-3 upgraded

Tomorrow I will disconnect the RCA's at the amp, power on the system and see if the Alt Whine is still present - if it IS, I know its not the HU or the RCA, if its not - It should be the HU or RCA's... correct?

I have heard about a common Pioneer problem that requires the RCA's to be grounded to the HU - anyone have any pics of that? I am specifically curious about exactly where I would need to attach the ground to the RCA's - I think its the metal shielding on the RCA end its self and therefore I would need to ground both RCA ends, but I could be mistaken.

if its on the HU side I will also run a jumper RCA from the HU to the amp - try and isolate the HU or the RCA's as the source.

No idea what to do if its on the amp side... so all suggestions there would help.

Thanks

pioneer deck............

Ground the outer shield of the rca's temporarily to see if it goes away but I bet it does.

^and if that fails. run a new ground wire for your deck and ground it with your amps

do you have a crossover network that is close to a power cable- the coils can pickup noise quite easily

ttocs wrote:pioneer deck............

Ground the outer shield of the rca's temporarily to see if it goes away but I bet it does.

wire from the RCA end (attached to the silver outer ring) to the screw in the back of the deck?

^and if that fails. run a new ground wire for your deck and ground it with your amps

that will suck, but I can run a temp ground and see if it fixes it...

do you have a crossover network that is close to a power cable- the coils can pickup noise quite easily

No crossover network, just using the x-over in the head unit and the crossovers in the amps.

eD amps if that makes a difference...

just take a piece of wire and strip a 1/4" or so. Pull the rca connector apart and when you put it together, slide the bare wire inbetween the outer shield to make a connection. Now just touch it to a good ground and see what happens. This is an old known problem with pioneer decks.

ttocs wrote:pioneer deck............

Ground the outer shield of the rca's temporarily to see if it goes away but I bet it does.

My bet is that you are right. I love Pioneer, but this problem has to go away or I will go elsewhere!!

ttocs wrote:pioneer deck............

Ground the outer shield of the rca's temporarily to see if it goes away but I bet it does.

unfortunately that didnt do it... didnt seem to really make any difference at all.

So, I am going to try and run a ground from the deck to the ground block today - if I can get the time. Thankfully my dash is still torn apart so I know we wont be using my pickup to run errands. lol

I would assume you set yer gain with yer meter like everyone else here ?

Have you tried adjusting the gain to see if it goes away or makes any adjustment?