u/Legitimate_Bus_4330

right now i’ve got the stock speakers i don’t have any underseat subwoofers or nothing. the speakers are completely stock. i was looking at the Vibe Subwoofer & Front Speaker and amp Upgrade Kit for BMW F20, F21 - 1 Series but it doesn’t come with tweeters or the rear speakers. i don’t have much knowledge on the this and was wondering if anyone has some other budget friendly options.