I have a 310... i was so sad when my kid scratched it all up from carrying it around.. he lost my my smaller speaker, so when i got the 310 he was dragging it around up the stairs and putting it on its side and than standing it upright.... so mad. But the quality is awesome in person... next to it.. however!!! i can be listening to music full blast and it can't even heard outside 😂 my dad was in my drive way and he came inside and was like 'i didnt even hear your music outside'.....i took it as an insult...Wish i got a bigger one. 😂