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Speaker sensitivity comparison

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This might be simple but a quick google search revealed various opinions and even arguments.  I'm trying to work out which is the most sensitive speaker comparing the two different measurement values.

 

4 ohm speaker with a sensitivity of 92 db at 1 watt at 1 metre vs

4 ohm speaker with a sensitivity of 84 db at 2.83 volts at 1 metre.

 

Both are car speakers.

 

Is there a simple answer or is it all in the maths?

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No difference between '1 watt at 1 meter' and '2.83 volts at 1 metre'.

 

2.83 volts = 1 watt of amplifier power.

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Thanks for the answer. I did read that but there seems to be lots of differing opinions.

So, in terms of sensitivity between these two car speakers one’s very inefficient compared to the other.

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Yeah, 84 is pretty low, and 92 is much better in terms of sensitivity, if the manufactures specs are correct.

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Yeah, we’ll I doubt the accuracy of the specs to be honest. Who would sell a car speaker that was so inefficient and expect people to buy it against something with a much higher rating?

Soinds like some marketing magic to me.

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50 minutes ago, Muon N' said:

No difference between '1 watt at 1 meter' and '2.83 volts at 1 metre'.

 

2.83 volts = 1 watt of amplifier power.

2.83 volts = 1 watt with respect to an 8 ohm load. Power will be greater than 1 watt (double, or 2 watts) into a 4 ohm load at 2.83v.

 

SS

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So, if both measurements are for four ohm speakers does that make any difference?

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1 minute ago, Sub Sonic said:

2.83 volts = 1 watt with respect to an 8 ohm load. Power will be greater than 1 watt (double, or 2 watts) into a 4 ohm load at 2.83v.

 

SS

Ah, very true, and these are both 4 ohms.

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Posted (edited)

The lesser one is then much lesser than the stated 84db sensitivity if this is the case? Maybe 81db?

Edited by Muon N'

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81 dB is very low, I own atc’s which are inefficient but are much more sensitive than 81 db.

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