Grim... wrote:
Doctor Glyndwr wrote:
Do you just listen to everything mad loud?
Yes.
Aha. Edit -- have you considered that your advice may not be relevant to people planning on avoiding tinnitus?
Grim... wrote:
Doctor Glyndwr wrote:
Or are you trying to use huge headphones?
No. Although I don't
think that would make much difference, because you're still sending the same voltage so you'd move bigger drivers a smaller amount. Maybe.
Jesus, no. Not even remotely correct. There are two factors:
1) headphone impedance, in ohms. V=IR and P=IV, so P=V^2/R, so the higher the headphone's resistance, the lower the amperage and the lower the resultant power/volume.
2) headphone efficiency, the multiplier on how much of the electrical power becomes sound volume directed down your ears. There's a number of factors here, but consider one straightforward example: open-backed over-ear headphones leak more sound into your environment than closed-back ones so need more electrical power for the same amount of sound volume.
Here's some working out from someone who knows more than me.
Quote:
If you want to drive circum/circa aural headphones directly from the 6P the opamp in your mobile device is still unlikely to stop you from finding the joy of tinnitus.
With efficient headphones (high sensitivity (dbl/mW or dbl/W) and low impedance (ohms)) most high end mobile devices will deliver adequate volume. For example: JH Audio Roxanne IEM (115dbl sound pressure level (SPL) @ 1mW, impedance = 15ohm). Current = voltage/impedance = .34V/15ohm = .023amp. Power = current*voltage = .023amp*.34V = 7.82mW. You're ready to deliver nuclear winter to your cochlea...leave no hair standing.
With circumaural headphones you might have high impedance (300ohm-600ohm) and low efficiency 100dbl @ 1W. For such headphones you would need high an external amplifier. Still most large headphones can be adequately driven by a mobile device. For instance: Sennheiser HD700 large open back circumaural (105dbl SPL @ 1mW, impedance = 150ohm). Current = voltage/impedance = .34V/150ohm = .0023amp. Power = current*voltage = .0023amp*.34V = .782mW. If you like your music loud your SPL might be around 100dbl or more so a .34V source isn't going to cut it. An HTC One M9 or iPhone will have no problem though.