tweeter vs loudspeaker system

tweeter and loudspeaker system both are nouns.

Word	Noun	Adjective	Verb	Adverb
tweeter	Yes	No	No	No
loudspeaker system	Yes	No	No	No

As nouns, loudspeaker system is a hypernym of tweeter; that is, loudspeaker system is a word with a broader meaning than tweeter:

tweeter: a loudspeaker that reproduces higher audio frequency sounds
loudspeaker system: electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance

Other hypernyms of tweeter include loudspeaker, speaker, speaker system, speaker unit.

tweeter (noun)	loudspeaker system (noun)
a loudspeaker that reproduces higher audio frequency sounds	electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance