Alternator interference

[azurisk]

Help! when i start my engine there's a very loud alternator hiss hearable over the speakers. what could this be (besides good mass points)? please help me soon i want to test my new woofer! Thanks in advance.

charles

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[rpeAMP 10+ year member]

OK, post some specs. Are your speakers powered by your HU or an external amp? Are the power wires for the amp(s) run away from the RCA (signal) wires?

 

[chris229 10+ year member]

Originally posted by rpeAMP OK, post some specs. Are your speakers powered by your HU or an external amp? Are the power wires for the amp(s) run away from the RCA (signal) wires?

don't say it-------------

 

[chris229 10+ year member]

Originally posted by azurisk Help! when i start my engine there's a very loud alternator hiss hearable over the speakers. what could this be (besides good mass points)? please help me soon i want to test my new woofer! Thanks in advance.

 

charles

you stating that it is a hissing type sound tells me that first your gains are TOO high-------- set your gain structure correctly

 

[azurisk]

I've got 2 sony amps (4*75 and 2*100, both are 1 ohm selectable) I have a 16 cm JBL GT component system and a 12 inch rockford power dvc hooked to those amps. I must say that in the hurry yesterday i messed up all the cables, in the sense of throwing all together in the booth. But i've got 5mm2 speaker wire and triple shielded rca. 20MM2 positive and ground.

How do i adjust gain settings?

best regards,

charles

 

[azurisk]

I found it! One of the ground wires wasn't attached properly! A stupid mistake. But i can tell that the new RF woofer plays excellent in the vented encosure i designed for it. Thanks for responding.

charles