ERRATA (BURN IN / CABLE IMPROVEMENTS)
I noticed that when these were first released, there were some comments regarding improvement with burn in, and also with changing the cable. Being the stubborn objectivist, this gave me an ideal opportunity to measure both claims.
Burn-in
This was a simple one. Record the frequency response OOTB with my usual measuring equipment, and then take the same measurements 3 months later (after 100 + hours use). The graph is shown below (right channel). There will be some minor variations due to seating on the coupler – but as you can see, any changes are extremely tiny and will be more to do with seating on the measuring equipment. And likewise, you'll get more change from differing insertion depths in your own ears, or use of different tips, than any perceived effects from burn in. So when someone suggests the MEE P1 need burn in – simply smile politely and ignore them
Cable Changes
I suspected that MEEs custom dynamic driver would be pretty stable – especially as far as impedance goes. While I couldn't measure this, I could measure the effect of different cables to see what if any changes there would be. So for this exercise I measured the included OFC and SPC cables, the FiiO RC-SE1B cable (with a balanced to SE adaptor), the ALO Tinsel, and also an OFC Trinity cable. As you can see from the graph below, there were very slight changes in actual volume (which indicates slight changes in impedance of the cables). But when volume matched, the cables all show the same frequency response. So again – if anyone indicates a more expensive cable as giving better sound-stage, vibrancy, bass/mids/treble etc – simply smile, ignore them, and adjust the volume. It should net the same results.
Raw data 5 cables
Left to right - FiiO SPC, Trinity OFC, ALO Tinsel SPC, MEE SPC
All cables after volume matching