Where's the Bass? LSX II

After numerous glitches in the Sonos system i decided to replace my 2 sonos-1 speakers and bought a set of LSX II. After setting them up, firmware updates, pairing etc. I was ready to get my glasses blown off... And then i was really underwhelmed... Tried about all the eq settings, but no mentionable bass sound. Dont get me wrong, it all sounds very good and clear, but the little sonos speakers gave so much more bass. Am i missing something? Is there another way to get the bass activated? Do i really need to buy a sub to make them work like i want them to sound?