Audio capacitor, hybrid polymer cap, low frequency signal, recycling aluminum

 EEE-FK Series 50 V 150 uF Ø 10 x 10.2 mm 105 °C Low ESR SMT Electrolytic

https://www.futureelectronics.com/p/passives--capacitors--aluminum-electrolytic-capacitors/eee-fk1h151p-panasonic-3028618