Anyone have measured HI-VI D5.8? - diyAudio
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Old 3rd November 2008, 01:49 PM   #1
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Default Anyone have measured HI-VI D5.8?

Hi,

I am interested also in this 5 1/2", looks attractive for Xmax and power handling but they claim 83dB and I have fear maybe real will be 81dB only!!
Does someone has measured a frequency response?

Many thanks,

Paolo
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Old 4th November 2008, 09:18 AM   #2
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No one have purchased this driver? How is it?

When I read the Zaph test of his brother, D6.8, I have seen very low efficency, almost 2 dB less than Hi-Vi claims. This is my fear, D5.8 is declared 2 dB less than D6.8 ..... so 2+2 =4 84dB - 4 = 80dB
Can you help my with this doubt?

Cheers,
Paolo
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Old 4th November 2008, 09:41 AM   #3
cotdt is offline cotdt  United States
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you can calculate the efficiency of the driver via the T-S parameters.
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Old 4th November 2008, 09:44 AM   #4
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Thanks cotdt,


Right, but IMO it is not so precise......and the T/S parameters Zaph have measured ALSO was different from claimed, very high mass if I remember well

Paolo
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Old 4th November 2008, 09:48 AM   #5
cotdt is offline cotdt  United States
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Quote:
Originally posted by inertial
Thanks cotdt,


Right, but IMO it is not so precise......and the T/S parameters Zaph have measured ALSO was different from claimed, very high mass if I remember well

Paolo
Efficiency is itself an approximation anyway. The T-S parameters will give you the relative efficiency at least, compared to the efficiency calculated from the T-S parameters of a driver of known efficiency.
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Old 4th November 2008, 09:52 AM   #6
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Right, I must try

Paolo
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Old 4th November 2008, 10:50 AM   #7
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If my math is correct I have obtained

0,26% with 2,83volt

How muthc dB spl is, do not have formula on my hand

Cheers,
Paolo
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Old 4th November 2008, 11:05 AM   #8
cotdt is offline cotdt  United States
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It should be around the same efficiency as the D6.8, about 83dB 1W/1m
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Old 4th November 2008, 11:15 AM   #9
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Oh, thanks

Not so bad it seems. Very strange they claim 2 db less for the D5.8 respect to the D6.8.
If it would be really 83dB it is ok for my target

Cheers,
Paolo
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