Speaker Resistance Equivalance

[WbSearch]

If an audio device requires 10 ohm speakers, can I use 8 ohm speakers and add a
2 ohm resistor in series, or does it require impedence matching ILO resistance?

 

[Richard Crowley]

If an audio device requires 10 ohm speakers, can I use 8 ohm speakers

Maybe. Depends on circumstances. More details would enable
more complete responses.

and add a 2 ohm resistor in series, or does it require impedence matching
ILO resistance?

There is no generic answer to your question.

 

[Virgil]

I have used resistors in series with speakers in cases like that with no
problem.
Virgil

 

[Sofie]

WbSearch:
The difference between 10 ohm speakers and 8 ohm speakers is not a big deal
and most likely the 8 ohm speakers will not cause any problems with your
"audio device".......... and, yes, if you are still concerned about causing
problems your "audio device" then adding a 2 ohm resistor in series with
each 8 ohm speaker (suitable wattage as determined by your "audio device")
will take care of the difference...... your "audio device" will then be
completely happy because it would be seeing a 10 ohm load.
Bear in mind that there is no free lunch...... 20 % of the power from your
"audio device" will be dissipated in the 2 ohm resistor, the other 80% will
make it to the speaker.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

If an audio device requires 10 ohm speakers, can I use 8 ohm speakers and add a
2 ohm resistor in series, or does it require impedence matching ILO

resistance?

 

[jakdedert]

Ditto...in any case, there is no such thing as a speaker in which the
impedance never varies from the marked value. IIRC, the parameters are
measured at a given frequency, or are an average.

Move from the given frequency and the impedance varies.

jak

 

[Lionel Wagner]

If an audio device requires 10 ohm speakers, can I use 8 ohm speakers and add a
2 ohm resistor in series, or does it require impedence matching ILO resistance?

No great problem using a resistor. Use a wire-wound, it will be
marginally better by presenting an inductive load, similar to
the speaker's voice coil.

 

[Richard Crowley]

I have used resistors in series with speakers in cases
like that with no problem.

That is one possible solution. But note that if this is some
high-power application it may not be desirable or even
very feasable.

It is also quite possible that the two-ohm difference doesn't
have any apreciable effect and resistors would be superfluous.

Mr. Search has just not offered enough detail to make any
kind of useful reply.

 

[WbSearch]

Thanks for the replies, and I do realise my question was very broad,
undedtailed. It was a generic qiestion for my nephew that has an old GM radio
he wants to put in his vehicle.

 

[Sofie]

WbSearch:
Forget about the 2 ohm resistor, install the 8 ohm speakers, and enjoy your
"audio device"..
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
------------------------

Thanks for the replies, and I do realise my question was very broad,
undedtailed. It was a generic qiestion for my nephew that has an old GM radio
he wants to put in his vehicle.

-----------------

If an audio device requires 10 ohm speakers, can I use 8 ohm speakers and add a
2 ohm resistor in series, or does it require impedence matching ILO

resistance
..
..
..

 

[WbSearch]

Will do, thanks. Sorry for the spelling in the previous post. Wanted to get
the message out in a hurry. Won't do that again. Too embarrassing.

 

[Asimov]

"WbSearch" bravely wrote to "All" (05 Feb 04 16:02:29)
--- on the heady topic of "Speaker Resistance Equivalance"

Wb> From: [email protected] (WbSearch)

Wb> If an audio device requires 10 ohm speakers, can I use 8 ohm speakers
Wb> and add a 2 ohm resistor in series, or does it require impedence
Wb> matching ILO resistance?

It could be a misprint and it should read 16 not 10?

 

[Virgil]

"WbSearch" bravely wrote to "All" (05 Feb 04 16:02:29)
--- on the heady topic of "Speaker Resistance Equivalance"

Wb> From: [email protected] (WbSearch)

Wb> If an audio device requires 10 ohm speakers, can I use 8 ohm speakers
Wb> and add a 2 ohm resistor in series, or does it require impedence
Wb> matching ILO resistance?

It could be a misprint and it should read 16 not 10?

If I remember right, some Delco radios used to use 10 ohm speakers.