[NJARC] Sony Radio Speaker Question 3.2 Ohm vs 8 Ohm

[David Sica]

Speaker impedance also varies fairly wildly with frequency. The rating is a
"nominal" one that's likely only true at a specified frequency or perhaps
few scattered frequencies.




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New Jersey Antique Radio Club

On Sat, Nov 11, 2017 at 7:21 AM, Charles Blanding <cblanding at comcast.net>
wrote:

> Just remember
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> Reply All = Everyone
>
> _________________________________________________________
> By the way, if the radio has a direct coupled output stage, a 4.7 ohm 1
> watt
> resistor in series with the 3.2 ohm speaker will give almost a perfect
> match
> for the 8 ohm radio. The volume will be reduced 50%, but most of these
> radios have so much gain that they go into clipping at half volume or more
> anyway. Try it and see.
>
> -----Original Message-----
> From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
> On Behalf Of Rich L.
> Sent: Friday, November 10, 2017 4:06 PM
> To: 'E. Suhaka'; 'New Jersey Antique Radio Club'
> Subject: Re: [NJARC] Sony Radio Speaker Question 3.2 Ohm vs 8 Ohm
>
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> Ed, you can get more distortion at high volume levels and your battery life
> will be reduced due to the higher peak currents in the audio output stage.
> But if it sounds good, use it!
>
> Rich
>
> -----Original Message-----
> From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
> On Behalf Of E. Suhaka
> Sent: Friday, November 10, 2017 11:48 AM
> To: New Jersey Antique Radio Club
> Subject: [NJARC] Sony Radio Speaker Question 3.2 Ohm vs 8 Ohm
>
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> I have a Sony portable transistor radio with a bad speaker in need of
> replacement.  The speaker is four inches diameter, 8 ohms, 2 watts.
> In my junk box I have a four inch speaker, 3.2 ohms, 3 watts.  I tested the
> junk box speaker with the radio and it seems to work OK.  Can anyone tell
> me
> if there might be some problem in the long run by using the 3.2 ohm junk
> box
> speaker in place of the original 8 ohm speaker?  It would be nice to know
> before I install the speaker (looks like I will have to use hot glue), slip
> in five pot and switch sliders and button up the whole thing with a bunch
> of
> screws.
>
> Regards,
>
> Ed S.
> N2COV
>
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