Colin,
The impedance is based on an alternating current, and it varies with
frequency. In a complete set of specs on a speaker, they usually talk about
a nominal impedance of 8 ohms because the actual impedance depends on the
frequency.
Steve
----- Original Message -----
From: "Colin McDonald" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 05, 2007 13:13
Subject: Re: OT stereo question
> ah, yes of course.
> I suppose the reactance comes when a signal is sent into the speaker and
> adjetates the coil right?
> 73
> Colin, V A6BKX
> ----- Original Message -----
> From: "Steve Dresser" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, September 05, 2007 11:02 AM
> Subject: Re: OT stereo question
>
>
>> Colin,
>>
>> Measuring speaker impedance with an Ohm meter doesn't give you an
>> accurate
>> reading because an ohm meter measures resistance, not impedance, which is
> a
>> combination of resistance and reactance.
>>
>> Steve
>>
>> ----- Original Message -----
>> From: "Colin McDonald" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Wednesday, September 05, 2007 12:53
>> Subject: Re: OT stereo question
>>
>>
>> > most home audio amplifiers are fine down to four ohms.
>> > If you can find the manual for your sherwood, it'll let you know what
> the
>> > minimum impedance load should be per channel.
>> > Its an interesting fact that speakers rated at 8 ohms often check out
> with
>> > an ohm meter at an ohm or two less then their rated impedance.
>> > Sometimes this is because while in operation, they are rated at 8ohms
>> > or
>> > show an 8ohm load to the amplifier, but when nothing is being sent into
>> > them, they are slightly less.
>> > Then you get crap speakers that are rated at 4 or 8 ohms, and show a 32
>> > ohm
>> > impedance...I bought a 12 inch sub rated at 1000 watts from a
> liquidation
>> > depot and when i finally got my ohm meter and tested the impedance of
> the
>> > speaker, it showed 32 ohms....not terribly good for a 1000 watt car
>> > amplifier rated at 4 ohms.
>> > I guess that's what happens when you only pay 15 bucks for such an
>> > item.
>> > 73
>> > Colin, V A6BKX
>> > ----- Original Message -----
>> > From: "Robert Clark" <[log in to unmask]>
>> > To: <[log in to unmask]>
>> > Sent: Tuesday, September 04, 2007 8:19 PM
>> > Subject: OT stereo question
>> >
>> >
>> >> Well I hope I did the right thing, ordered a Sherwood stereo
>> >> receiver.
>> >> Quewastion I ahve is, I have 2 pairs of speakers which are 6 ohms.
>> >> Should
>> > I
>> >> bother with them, get matching transformers, or look for 8 ohm
> speakers?
>> >>
>> >> *---* *---* *---* *---* *---*
>> >> Money can't buy you happiness. but it does bring you a more pleasant
> form
>> > of
>> >> misery.
>> >> -- Spike Milligan
>> >> Robert & Dreamer Doll ke7nwn
>> >> Newport, Oregon
>> >> N24C 3G 8/2000 Hookup
>> >> [log in to unmask]
>> >> http://webpages.charter.net/dog_guide/
>> >>
>> >>
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> 9/4/2007
>> > 9:14 AM
>> >>
>> >>
>> >
>> >
>> >
>>
>>
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> 10:36 PM
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>
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