maybe no one saw my post lol.
are there any angled pads available for the he-400?
and if so where do i get them?
this is coming off of ohm's law. if a high impedance needs less current and more voltage does that mean that a low impedance needs more current and less voltage? if so, is there a negative sound effect if a low impedance (such as the he-400) headphone gets more voltage than current or will it just not have enough of the right power to amplify?
also, where is the chart that shows how much current or voltage different impedances need?
then if you could, what kind of db's are we talking about as far as normal to high listening levels go?
Lawton pads fit, Alpha pads fit, both are angled, both actually makes them sound pretty bad.
They said the D100 though, which is a better amp DAC. Lots of people also like the Schiit Modi and Magni combination. You could use The Vali instead of the Magni if you wanted tubeness. :D
Edit: changed amp to dac.
Just what my ears hear, sorry. I do like the Jerg pads and/or Jmoney.
The reason that planars need so much more power is because of their inefficiency relative to many dynamics - the "behavior" is still the same in terms of reaching a given loudness.
If a planar were rated at 90 dB/1mW it would need about 7-8 mWs to hit 100 dB - or several times the power required of a dynamic that happened to be rated at 100 dB/1mW. For each headphone to reach 120 dB, the less efficient would need about 1,000 mWs, while the more efficient can would require only about 120 mWs.
I think you are confusing the scale of power needed with what are actually big differences in rated efficiency. A 10 dB spread between speakers is significant.
mW is power. power is voltage x current.
Ohm's law dictates that the higher the impedance the less current and more voltage an amplifier needs to reach a certain level of power, which in this case is mw. High impedance beyers aren't more difficult to drive, they're just different to drive.
That's a good question. Checking my trusty table (which happens to give the efficiency ratings as 93, 94 and 94 for the 32, 250 and 600 respectively), the 250 and 600 require the same amount of power to get equal SPL. Buuuuuuut the higher impedance, the more voltage is required.
Quote:Originally Posted by manbear
An amplifier may also put out less power at 600 ohms than at 32 ohms. So at the same position on the volume knob, you might get less volume from 600 ohm headphones, but that's because they are seeing less power from the amp.
All great info Gents! Thank you. I still need to wrap my head around the whole thing, the link up top will be a good read for me over the weekend.