Prog Rock Man
Headphoneus Supremus
- Joined
- Jul 2, 2009
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Quote:
"If your cans are low impedance but are very sensitive (the case of Grados and most IEMs) then despite their asking more current from the source, they still manage to sound very loud because they need very little power to do so."
So using my collection as an example, the Grados and the Senns are the same low impedance (32ohms) but their sensitivity means they do not need a huge amount of power to go loud. The Goldrings have a higher impedance, but they are more sensitive than the Grados, and they need more power to go loud. So two headphones with the same SPL the more impedance, the more power is needed -
Grado SR80 32ohms SPL 98
Goldring NS1000 300ohms SPL 101 (with NR on)
Senn PX200 32ohms SPL 115.
Hence, if put all three into an ipod the Senns are fine, the grados are a bit strangled and the Goldrings sound terrible when compared to putting all three into an MF X-CANV8P. That is because the ipods output is milli watts compared to the X-CANS 1.3 watts.
I hope I have got this right and picked out the salient points!
Originally Posted by plonter /img/forum/go_quote.gif ......just tell me if i am correct in the next assumption: given two headphones with the same SPL level, the more the impedance, the harder it will be to drive? |
"If your cans are low impedance but are very sensitive (the case of Grados and most IEMs) then despite their asking more current from the source, they still manage to sound very loud because they need very little power to do so."
So using my collection as an example, the Grados and the Senns are the same low impedance (32ohms) but their sensitivity means they do not need a huge amount of power to go loud. The Goldrings have a higher impedance, but they are more sensitive than the Grados, and they need more power to go loud. So two headphones with the same SPL the more impedance, the more power is needed -
Grado SR80 32ohms SPL 98
Goldring NS1000 300ohms SPL 101 (with NR on)
Senn PX200 32ohms SPL 115.
Hence, if put all three into an ipod the Senns are fine, the grados are a bit strangled and the Goldrings sound terrible when compared to putting all three into an MF X-CANV8P. That is because the ipods output is milli watts compared to the X-CANS 1.3 watts.
I hope I have got this right and picked out the salient points!