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Old 08-04-2005, 11:32 PM
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New head unit, old speakers

I am installing a new head unit on my 62 cadillac. But the speakers are old. The head unit requires power and ground to go through the speaker, but I cannot find a ground wire. I assume it is grounded to the car itself. Should i leave the speaker grounded to the car and just provide power or should I buy new speakers? thanks

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Old 08-09-2005, 09:21 AM
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your new hea unit is going to be too much power to your old speakers. and you definetly dont want the speakers to have a common ground. they dont sound good like that at all, you will have alternator feedback. just buy some cheap replacement speakers from walmart or a pawn shop and some cheap wiring and wire them yourself. it is fairly simple.
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Old 08-09-2005, 03:46 PM
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Confused

Doc here,

Shaking head like crazy....

POWER and GROUND SHOULD NEVER be applied to a Speaker....

Unless you enjoy shooting paper wads, smoke and fire...let's see..650 CCA through 4 , 8 or 16 ohms to ground through a speaker cone made of 26 gauge wire..." Save me Mr Wizard!!!".....trissel,trazzel, trussel, trome...time for this one to come home......"

Is this a HEAD unit..as in Remote Dash mount controller..Only, or a head unit that includes a trunk mounted amp as well?

If that's the Case, the AMP will require a POWER(about 4 gauge cable) and HARD ground (about 4 Gauge) an AMP energize line (usually blue 18 gauge wire that runs to the radio power antenna wire)

Your line or RCA INPUTS From the Radio/CD audio OUTPUT harness, to the AMP usually +left -Left, +right -right, -right rear, +left rear, some systems, center or sub-woofer.

Your AMP OUTPUT will consist of : +left-left, +left rear, -right rear, +right -right, Center or sub-woofer from the AMP..

NEVER ground ANY speaker on ANY modern audio system to a hard (frame) ground, or you will destroy the audio strip-line brick inside the amp from thermo overload..By modern, I mean any radio that is stereo, over 1959 vintage,and is solid state.

Doc
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