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That's tricky given that a speaker with better sensitivity will be louder than a less sensitive one for the same power. An 8 ohms speaker with a sensitivity of 93db/W/m will be twice as loud as a 4 ohms speaker rated at 90db/w/m (both fed 1W of power, that's 2.83V for 8 ohms and 1.415V for 4 ohms). The net result is that for the same loudness the 8 ohms speaker will put less load on the stereo or amp.
So for 93db/W/m, the 8 ohms speaker requires 2.83V, so draws 0.35A. The 4 ohms speaker will need 2.83V instead of 1.415V for the same loudness (it is 3dB less efficient). So it draws 0.7A at 2.83V. Thus the amp runs hotter.
In summary car systems are designed for 4 ohms and speakers are quoted for loudness at 2.83V - that makes them appear louder than 8 ohms speakers. This is wrong since loudness is not measured with voltage but with watts. So whenever you see a 4 ohms driver quoted for 2.83V simply reduce 3dB from the loudness (SPL) value advertised to find its actual rating and then get the speaker that has the highest SPL rating that you can afford. That way you will get more loudness without having to turn up the volume knob all the way to max.
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Which is best for portable speaker impedence 3 ohms or 4 ohms?
Nothing is better.
My surround speaker are 8 ohms front speaker are 6 ohms the amp is set to 6 ohms What is the impact on surround speaker?
The speaker will be fine and there will be little impact on its performance. In these situations, if there is a problem, it will be with the amp because that is what delivers the electrical current to the speaker. The situation you want to avoid is having speakers with a lower impedance connected to your amplifier. So you might have had a problem if your surround speakers were 4 ohms. However, as they have a higher impedance than the amp is set for, I wouldn't worry about it.
How many ohms is a computer speaker?
There is no single standard. Many computer speakers are rated at 8 ohms while others are 16 ohms or higher. My computer subwoofer here is 4 ohms.
Why are car speaker 4 ohms and home speakers 8 ohms I understand the technical difference but why is there a difference?
Car stereos use 12V which is lower than the 30V used in home stereos. Power = voltage^2/Resistance. To get the same power with lower voltage the speaker resistance is lower. Most home speakers are now 4 Ohms and car speakers are now 2 Ohms.
Can you bridge an 8 ohm speaker to 4 ohms?
Ohms is a measure of resistance. When the electricity passes into the speaker, some of it is 'resisted.' The ohms rating of the speaker is how much is resisted, and an indication of how much energy it takes to drive it - the higher the ohms rating, the more difficult it is to drive.
What is the highest ohms a sub woofer can have?
4, the lower the better
How much ohms does 1500 watts speaker has?
The wattage and ohms of a speaker are not related; the resistance for speakers is usually 4 or 8 ohms.
How powerful are ohms?
Ohms do not relate to power per se. Ohms do however contribute how much power a circuit can deliver. In a given circuit the lower the resistance (measured in ohms) the higher the current & higher the power. This is assuming the voltage remains constant.
What does speaker A minimum 4 ohms speaker impedance means?
The speaker you connect to those terminals needs to be 4 ohms or greater.
Voltmeter DMM or VOM has the higher loading effect?
The VOM has the higher loading effect, because it has a lower impedance. It is typical for a VOM to have an impedance of 20K ohms per volt while the DMM has a fixed impedance of 10M ohms or 20M ohms.
Is a 4 ohm subwoofer better then a 8 ohm subwoofer?
You need to match the speaker with the amplifier. Better or worse is not the question. The question is dynamic range and the possibility of overloading the amplifier. If the amplifier is rated 4 ohms, use a 4 ohm speaker. Same for 8 ohms. Do not "mix and match".
What is the accptable value in ohms for a good earthing system?
10 ohms or less is considered a good earth ground reference. The lower, the better.
