pulsing from speakers at high volume ..

[Harleyfx69 10+ year member]

at normal volume and up to slight high sound levels its fine ,

then it just gets horrible pulsing from the speakers, and the speakers start going from no compression to full excursion , door speakers and subwoofers do this,

this is on an Aq2200d with 2 aq hdc312's and a kicker 650.4 to 2 sets of last years forum boner components and coaxial speakers ..

my only thoughts on this, the system has set for the last 2 months without being hooked up and played as i had to get new alternator and everything else put in ,

and the system battery only has a very crappy ground

what is causing this, also it does it on an ipod and CD / radio

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[icandoit42069]

sounds like a ground or rca issue. are your gains set high on your amps?

 

[zierbox 10+ year member]

If both of your amplifiers are doing this, the problem must be coming from the audio source or path (RCA as suggested)

How many rca cables are you running (front, rear, and bass) ?

Have tried unplugging one or more RCA cables

What about the speaker out wire on the radio? Are they being used? Are they protected? Are they seeing some type of short or bad speaker?

Check the voltage at the radio connection, with the system playing as full volume

 

[Harleyfx69 10+ year member]

thanks guys,

for the system, its got front / rear and sub all dedicated RCA's

the speaker out on the radios is no longer used, just rcas to the amps along with the turn on,

then amp to speakers,

it may not be happening on my subwoofers as i think upon it now it would be louder if the interior speakers were any indicator,

would the ground off the battery cause this ? or is it amp related grounding / wire isue ?