mistergrumpy
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| posted on 10/9/06 at 09:00 AM |
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Adding Speaker
Have recently moved the extractor fan in the shower to put it in a better place and have been left with a nice circular hole in the ceiling which gave
me an idea. Maybe I could drop an old Pioneer car speaker into it and run it off the hi fi, save just turning the volume up in the living room. It
doesn't look like a cardboard cone, more graphite type material but the impedence is 4 ohms compared with 6 ohms on the hi fi so would I be
right in thinking if I added a 2 ohms resistor to the +ve line all should be dandy?
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RazMan
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| posted on 10/9/06 at 09:38 AM |
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You probably wouldn't need to modify the speaker imo. You can't change the impedance by adding a resistor (ohms law doesn't apply to
speakers) so just connect it up and see how it sounds.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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jonbeedle
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| posted on 10/9/06 at 12:52 PM |
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I've had speakers in my dining room, kitchen and bathroom ceilings for years. I run them off a seperate stereo which has an option for two
pairs of stereo speakers. One pair which are in the dining room is off one speaker channel and the other two pairs are wired in series off the other
channel. They are just standard 25w Pioneer car speakers rated at 4 - 8 ohms. I usually just have the radio on but it's nice to have Christmas
carols playing quietly in each room when family and friends come round at Christmas!
Cheers
Jon
[Edited on 10/9/06 by jonbeedle]
"Everyone is entitled to an opinion however stupid!"
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nitram38
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| posted on 10/9/06 at 05:18 PM |
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You will need a speaker that is waterproof, otherwise the steam will knacker the paper cone inside.
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MikeRJ
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| posted on 10/9/06 at 07:29 PM |
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quote:
Originally posted by RazMan
You probably wouldn't need to modify the speaker imo. You can't change the impedance by adding a resistor (ohms law doesn't apply to
speakers) so just connect it up and see how it sounds.
You can change the impedance seen by the amp, by adding series resistance. However, it's not a great way of doing things as it reduces
efficiency (power is dissipated in the resistor) and it ruins the damping factor of the amp. A matching transformer would be the "proper"
way of doing this.
However, none of this is realy relevant unless you are actualy expecting audiophile quality sound from a random car speakers jammed into a hole in the
ceiling 
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mistergrumpy
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| posted on 10/9/06 at 08:18 PM |
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quote:
However, none of this is realy relevant unless you are actualy expecting audiophile quality sound from a random car speakers jammed into a hole in the
ceiling
You're right. See, house is a bungalow and a funny layout and my neighbour don't have telly so I reckon as long as it looks okay,
I'll give it a bash. Saves filling the hole in as well. More time to build.
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