Originally Posted by Papander
But anyways.. according to internet K340 has 400ohm impedance and 94dB/mW sensitivity. This means in order to reach 110dBSPL you would need something that can output 40mW, 4Vrms and 10mA to 400ohm. After looking at Little Dot MKII specs it should be able to do this, meaning that it can drive the headphones, but I have no idea if it is good match sound wise to K340 as I don't own either of those models.
Hi pentatonic, I just wanted to chime in and give you a little bit of extra information that I have gleaned from these boards as it relates to Papander's post here. This is my understanding of the relationship between output power (mW) and sensitivity, and it seems to jive with Papander's conclusion above.
94 dB/mW sensitivity for your headphones means that your headphones should be capable of producing a max. of 94 dB if they receive 1 mW of power from your amp.
1 mW --> 94 dB
2 mW --> 97 dB
4 mW --> 100 dB
8 mW --> 103 dB
16 mW --> 106 dB
32 mW --> 109 dB
64 mW --> 112 dB, etc.
Additionally, the poster below me has located the output power specs for the two models (300 mW @ 300 ohms vs. 350 mW @ 300/600 ohms). Honestly, the difference in output power between the two models is going to be very minimal. However, I cannot comment on the differences in coloration/soundstage, etc. between the two models... This post offers some impressions and may be of some help.
Edited by wilky61 - 4/29/12 at 9:19am