I bought a takamine electro acoustic bass and I pluged it into my rubbish amp just to test it but the jack is not connecting properly it's not clicking when it goes into the bass and it plays but if it falls out it screeches. Are the jacks meant to be smaller I'n these or something?
I have no clue it's not my amp just a normal amp the lead is the same that fits into my electric bass an electric guitar
It's from the internet tho from gear 4 music Erm how much is the part that you have to change
You need more sand, trust me!

But for serious part since the bass guitar section is more mature, try asking your dad if what you have is a 1/4" jack, dads know bout that shit. Or tighten the nut on the bass.
Hi, you're better than me. Have a nice day!