Old radio help with wires

[den9112]

Hi I have a a old alba radio in a old classic car and was thinking of of upgrading so I took the console out to have a look at the connections and what I can see it only as 3 wires coming out of it and a antenna connection…the car as two speakers fitted and both work as does the radio..Am I missing something here as I only see a power wire , earth wire and another one which is white so we’re are the speaker wire connections …

Edited by den9112 on Tuesday 20th August 21:02

[595Heaven]

If it not stereo is the single wire feeding the speakers, which are then grounded?

Not sure if that works with interference from ignition etc but if that is all tThe wires there are that is my guess. Rose and pinot noir may be clouding my thinking though… (I’m on holiday)

[bangerhoarder]

Speakers may be wired to earth, rather than to negative on the unit. Some units didn’t have an earth wire and used the radio body (sometimes with a terminal post).

Best to start from scratch if fitting something more modern - you’ll want a switched live, permanent, maybe a lighting signal, new speaker wires too.

[den9112]

[den9112]

Thanks

[bangerhoarder]

If it has two speakers running from one wire, that'll present either 2 ohms (parallel) or 16 ohms (series) impedance to the amplifier. Neither is good, if upgrading. The speakers will need separately wiring back to the new head unit if it has multiple outputs.