So I currently use a pair of Beyerdynamic DT-770 M's, that have an impedance of 80Ω. I plug them directly into my Macbook Pro (late 2008 model), and I find that instead of being too quiet, I have to stay around the 4/16 volume area on my Macbook as a maximum. (This is with the in-line volume control being in the middle)
Is this normal? I thought that with an impedance of 80Ωs, it should be a lot quieter.
I ask this as I am thinking of buying the DT-990s, which come in 32Ω, 250Ω, and 600Ωs. I'm trying to figure out whether the 32Ω will be too loud, or if the 250Ω will be too soft when directly plugged into my laptop.
The 770's have a 105db nominal SPL and the 990's have a 96db nominal SPL.