>extra $90
Full price breakdown. Extra cost=EC
Problems to solve
>mobility
>dualsource
Dual source is PS4 + DAC. PS4 spotify streaming is garbage, and the headphone jack through the controller is BT anyway. I've done PS4 optical into receiver, then output from receiver + DAC to headphones with a splitter cable. Got nasty feedback. Currently, I have no configuration that doesn't give me feedback using MSR7s. M100s have two jacks, so I could use two lines (receiver one side, DAC on the other) with presumably no problems, with another cable.
Solutions:
>$7 audio only cable, fit for M100 is nuisance to find but w/e
>$12 3-button control, inline mic and volume
Limited in mobility while dualsourcing. Likely a repeat purchase given my history. Cheapest upfront.
>BT adapter ($12-$30)
Can't find one that fits the M100. Moot point until I find one.
>Crossfade Wireless (~$90)
Most convenient. Wired to DAC for analog SQ with music, BT to PS4 for game sounds, OR analog to receiver for no SQ loss anywhere. Comes with cable with volume control on the headphones.
>lifetime warranty
it's 2 years all-inclusive (particularly manufacturer defects) , but mechanical repairs outside of warranty are free.
Ideally, I'd find a way to setup MSR7s with both the ps4 and dac but whatever.
In any case, I'll need to acquire a 3.5mm cable that fits the M100.
So EC for the Wireless is $90-$7 = $83, or $76 if considering mic + volume control cable instead.
If I want the mobility of wireless, adapter is $15. I can functionally forego a cable if I get an adapter so minimum cost here is $15.
EC is $75 against the adapter, $68 or $63 if I want a cable as well.
Based on what I am in the market for, extra cost is max $83 and min $63. Unique to the headphones solution is I make use of the trade-in value of my old headphones, which are otherwise worthless, custom engraving/color scheme from vmoda included, lifetime repairs, max comfort, remove need for replacement cables.