It's the ampere, the current, not the voltage that increase with lower impedance speakers. When a low ohm speaker outputs the same audio power the amplifier also outputs the same power, no difference there, but the amplifier needs to be able to handle a higher ampere output at a lower voltage but it will still be the same power output from the amplifier but the volume setting probably has to be set lower to give the same audio level from a low ohm speaker.If you drive a 4 ohm speaker with an amplifier rated for an 8 ohm speaker, you are requiring the amplifier to double the power output in order to drive the speaker. At low volume, this might be OK
Yes, if the volume level to the final amp are the same, but then the loudspeaker will also produce twice the output power. You imply that low ohm speakers have half the effecience of a higher ohm speaker. All the power that the amplifier produce are also produced out as audio volume from the speaker.More power draw from the amplifier for a 4 ohm speaker…
I think you might confuce ampere/current with power.The 8-ohm speaker requires less power to generate the same level of volume as a 4-ohm speaker.
I used to buy older Motorola amplified speakers in the steel enclosures. I would bypass the amplifier and wire the speakers directly and they worked very well. The speaker itself in those units were all 32 ohms and had plenty of volume for indoor use.8 ohms will work as RandyKuff says. I have a bunch of Motorola speakers that were going to be discarded when they upgraded the local police departments radios. They all work great. I was told the speakers were either 4 or 8 ohms and remember putting a 4 ohm resister both in parallel and then in series to see if I could tell a difference. I don’t recall hearing a difference but it’s been better than ten years and my memory isn’t as good as it used to be.
The majority (if not all) modern equipment's 8-ohms; if memory serves, speakers used with tube equipment's 32-ohms; I've seen 4-ohms but not sure where that's used....I'm looking at different external speakers for my SDS200. Some are 8 ohm, some are 4 ohm. I looked in the SDS200 manual, but can't find what impedence is required. Does anyone know off hand?
The majority (if not all) modern equipment's 8-ohms; if memory serves, speakers used with tube equipment's 32-ohms; I've seen 4-ohms but not sure where that's used....
Well, I suppose you could try both a 4-ohm speaker and an 8-ohm speaker and the one that works better indicates the right speaker. (At least, that's the simple approach although I suppose someone reading this will come up with something more complicated that will work better...)Motorola used some 4 ohm speakers in the 1990s or so. I'm looking at the Icom SP-35, and the only information I can find seems to indicated it's also 4 ohms. Hence my question.
Speaker impedances are variable with frequency. Four or eight ohms are nominal values. The same is true of output impedances from radios. A lower impedance generally results in higher output from a solid state amplifier. Otherwise stop worrying about it. There is no magic to it.
Uniden handheld scanners have headphone jacks with an attenuated output to avoid overdriving headphones. They need amplified speakers to produce an acceptable volume.
This subject comes up over and over in these threads. It is really a non-issue.
Personally I use only 6.17499375 ohm speakers.