I recently got a Sennheiser HD201 Headphones. I am not sure to whether my laptop is good enough to drive these headphones. I have an Acer V5-131 laptop with Realtek audio.
I don't like my music loud. With my sony in ear style earphones I only listen at 40-50% volume both in player and on laptop volume. But with my new headphones I have to turn up volume 100%(both player and laptop) to reach decent audible levels. I feel like audio is getting distorted as well because of this. would an amp help here? I am not a expert but, will audio get distorted at 100% volume?
I checked out some amplifiers like FiiO E6 which outputs about 100-150mw to my HD201 which is 24 Ohms. So before getting an amplifier I want to know what my laptops headphone jack is capable of. I want to know what is typical power rating for laptop/notebook headphone jack?
From this link which is really useful and quite comprehensive, I calculated required power for my headphones for decent audible level without any distortion.
For 110db SPL which is about 30db average. Antilog ( ( 110 – 108) / 20 ) = 1.25V RMS 108 db/1V RMS is my headphone sensitivity
Now coming to power requirement ( V * V ) / Impedance = (1.25 * 1.25)/24 ohm = 65mW
I looked up further. My laptop is using Realtek ALC269 chip. I checked datasheet as well. Line voltage is 1.5v RMS MAX (this can drop significantly based on load and current limiting). But there is no max current limit provided there (or I couldn't read datasheet properly) so I could not calculate max output power.