FosPower (1 Pack) 3.5mm Male to Female Auxiliary Stereo Audio Headphone Jack AUX Adapter [4-Conductor TRRS | 24K Gold Plated Plug] for iPhone, Smartphones, Tablets, Speakers, Microphone & Card Readers https://www.amazon.com/dp/B016AHYRNW/ref=cm_sw_r_cp_apa_i_lEolCb75TNZ48
I'm thinking of something like this, and since what you plug into to the earphone plug triggers the impedance, why wouldn't it matter?