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Edition 9 power handling? - Page 3

post #31 of 37
9/30/08 at 3:24am
Thread Starter 
I'd have to be far more tech-savvy than I am to even be able to pretend to understand that. Can any of our electronics gurus chime in with a translation?
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post #32 of 37
9/30/08 at 8:55am
Many words, equations and numbers but no information about maximum power handling of the Edition 9's actually. So I assume there is no limit. Then anybody that blows them due to misuse, amplifier damage, etc. may return them on warranty and expect replacement. Pretty comfortable situation.
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post #33 of 37
10/1/08 at 7:29pm
Quote:
Originally Posted by jcx View Post
if for Edition 9 you have 96 dB SPL re 1 mW…
Quote:
Originally Posted by ultrapaul View Post
From Florian:
…
•SENSIVITY in dB/mW for the Ed. 9 is 96 dB and it shows based on the impedance (pre-amp plus divers) at what kind of levels how much VOLTAGES are ... frequency 1 kHz / sinusodial.
…
sensitivity spec assumption looks to be definitively verified

so how much power do you need to cover dynamic peaks in music without clipping?
Quote:
Originally Posted by jcx View Post
…
then ~120 dB peak SPL will require ~+24 dB mW = 250 mW_rms

250mW_rms requires ~ 130 mA, 3.9 V peak amplitude into 30 Ohms

the Pico specs look to have this covered
no equations! (or rather I cranked them for you already)

you might want to look at HeadWize - Article: Preventing Hearing Damage When Listening With Headphones (A HeadWize Headphone Guide)
just to get some idea of dynamic peak SPL requirements and safe average listening level

Quote:
Originally Posted by jcx View Post
…
power handling specs are more about physical damage from overheating the voice coil and have little to due with audio drive requirements
Quote:
Originally Posted by ultrapaul View Post
From Florian:

These measurements are mixing loudspeaker measuring applications modalities with the reinforce instrument headphones. It is totally unusual to realize such tech data for headphones:

•"Power Handling Capacity" of 1500mW (IEC <> made for loudspeakers!!!). Short extract: "Power handling capacity Impedance Recommended input power Dispersion ... 2000 W IEC norm 268-5 4 ohms/loadspeaker nominal 1500 – 3000 W into 4 ohms .... In the eighties we had some "destroying lever" data's, but also this was finished in IEC ...
Hope that helps.
Florian gives 1500mW as the "Power Handling Capacity"

and as I stated the number is useless for you - tells you how much continuous power needed to cook your headphone - not how much required to drive it with adequate dynamic SPL headroom

its nice that the 250 mW required to drive the Edition 9 to 120 dB SPL is less than 1500 mW - but this isn't a hard requirement since the power handling capacity is a continuous rating and 120 dB SPL peaks should be very short and infrequent in music listening so the voice coil has time to cool off

at low frequencies most drivers will bottom out on the magnet backplate at much lower power input than the Power Handling Capacity
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post #34 of 37
10/1/08 at 7:43pm
Thread Starter 
Thanks for that clarification jcx

So the final consensus is that to be "fully driven" the Ed9 only requires 130mA/3.9V, and can handle up to 1.5W before it melts. Is that correct?
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post #35 of 37
10/5/08 at 3:07am
Yeap, that's what I gather.

Covenant, you are an absolute perfectionist. I guess it comes with the hobby.
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post #36 of 37
10/17/08 at 5:58am
I've had them modified to the Siver Dragon recabling (4 foot portable length). The iQube drives them seemlessly and elegantly. I've compared recently to my Rudistor XJ-03
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post #37 of 37
10/26/08 at 11:54pm
Thread Starter 
Quote:
Originally Posted by mofonyx View Post
Covenant, you are an absolute perfectionist. I guess it comes with the hobby.
Why thank you, I take that as a high compliment
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