mookaloid
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| posted on 18/11/10 at 03:46 PM |
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daft car stereo question
Sorry for the daft question,
If I fit an upgraded stereo to my daughters car - which only has 2 front speakers, is it ok to run it with only the 2 speakers even if it has outputs
for 4 speakers?
Cheers
Mooky 
"That thing you're thinking - it wont be that."
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Daddylonglegs
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| posted on 18/11/10 at 03:49 PM |
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As long as you make sure the 2 outputs that are not used are not shorting to each other or anywhere else that should be OK.
It looks like the Midget is winning at the moment......
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BenB
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| posted on 18/11/10 at 03:59 PM |
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Yes, it's absolutely fine as, if the connectors has the other wires just cuts the ends off and wrap them (so they can't short).
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loggyboy
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| posted on 18/11/10 at 04:22 PM |
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I assume its a relatively new stereo?
I do recal it was possible to damage the output tranistors but I would guess this is on older stereos. You could always fade the sound forward to be
sure though.
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Daddylonglegs
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| posted on 18/11/10 at 05:57 PM |
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Good point Loggyboy, but I think that was, as you say, on the older sets. I would guess the new ones would sense no current draw on those unused
channels and so prevent excess load. In older sets, the open-circuit (i.e. no connection) was seen as a really high impedance on the channel and could
draw a higher curent than the devices could handle over a long time. Not 100% sure but if I'm wrong someone will put me right
HTH
It looks like the Midget is winning at the moment......
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PSpirine
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| posted on 18/11/10 at 07:07 PM |
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Surely that can't be right.. that would mean that you'd have a maximum speaker impedance rating on those stereos? As far as I recall, you
only ever got minimum impedance (usually 4-8 ohms on older ones)
Definitely nothing wrong with connecting only two speakers up to new ones!
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SteveWalker
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| posted on 18/11/10 at 08:20 PM |
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Old valve amplifiers and some transistor ones could produce a very high voltage with no load and burn themselves out. Modern transistor ones
don't have this problem.
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hillbillyracer
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| posted on 18/11/10 at 10:11 PM |
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I've never given this any thought till now, but we've been fitting radios to the cabs of tractors etc with just two speakers for years
& not seen any problems that I'm aware of.
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