solderdude
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Post by solderdude on Dec 11, 2013 20:14:31 GMT
There has always been a lot of mystery about how much power, voltage and or current is needed to drive headphones to certain levels. Also it isn't always clear how much SPL the headphone can give at its maximum ratings. The numbers for effiency are all over the place and each brand uses different reference levels. I thought it was time to bring some order in the chaos. Download THIS table and see if your favorite headphone(s) is listed in the table and see what power (voltage) you need. Will also post this on the website so it may be easier to find.
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juke
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Post by juke on Dec 11, 2013 23:15:03 GMT
That's a great table Frans.
Certainly highlights the HE6's need for a powerful (if that's the right word) amplifier.
Syd
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Javier
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Digital bytes
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Post by Javier on Dec 12, 2013 10:44:58 GMT
Very interesting indeed but I have a question... According to the table, the K601 should be more power hungry than the K501 thus when switching from the former to the latter I should be increasing power to get the same SP level, right? the thing is that it actually it seems to work the other way around, the 601 sounds louder for the same given vol pot position. Could it be the specs for the 501's sensitivity are too optimistic? any other reason?
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solderdude
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Post by solderdude on Dec 12, 2013 11:40:30 GMT
When you look at the numbers manufacturers put on the web they often differ with the ones Tyll measures.
Also when you take a look at some measurements of the same headphone performed by Tyll you will notice the efficiency values are all over the place.
Add to that production may have changed(silently) and production spread e.t.c. this could explain the numbers.
To compile the list I made use of Tyll's measurements and manufacturers data. Sometimes they were closely the same sometimes they were (way) off.
A lot of manufacturers do not even mention the power rating or other relevant data.
The numbers of some headphones thus may be 'off'. Also headphones may not be on the list (only on- and over-ear are b.t.w.)
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solderdude
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Post by solderdude on Mar 20, 2014 22:45:37 GMT
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