I use this from my MoJo to pre-amp and it sounds very good:
Mogami GOLD 3.5-2RCA-15 Stereo Audio Y-Adapter Cable, 3.5mm TRS Plug to Dual RCA Plugs, Gold Contacts, Straight Connectors, 15 Foot https://www.amazon.com/dp/B01N14TRZC/ref=cm_sw_r_cp_apip_Jlv6jVBHjKcxh
Mogami GOLD 3.5-2RCA-15 Stereo Audio Y-Adapter Cable, 3.5mm TRS Plug to Dual RCA Plugs, Gold Contacts, Straight Connectors, 15 Foot https://www.amazon.com/dp/B01N14TRZC/ref=cm_sw_r_cp_apip_Jlv6jVBHjKcxh