Subwoofer for music, how low?

I am looking for a pair of subs for music. I plan on having four if the two can blend with my speakers.

I have the Tekton Double Impact and tomorrow I will get a set of Buchardt S400Mk2.

I have been looking at the REL T/9x but the only go down to 27Hz at -3db. Should a sub not go down to 20Hz?

I live in Denmark so I have fewer options. I really like the swarm sub array but to costly to get it to Denmark.

I am looking for recommendations. It could be DIY or a specific sub.

I am open for suggestions

Merry Christmas

martin-andersen12-26-2021 1:35pm

jheppe815 Details Discussions Posts This discussion Message User 67 posts 12-27-2021 at 02:53am Copy Comment URL Report Comment Edit Delete Food for thought: Kick drum fundamental can be around 50 to 90 hertz. Bass guitar fundamentals are 40 to 400 hertz. Lowest note on the piano is 27.5 hertz. A Roland 808 drum machine kick drum (used extensively in rap music) has fundamentals around 60 hertz. There is a lot of energy in the 50 to 80 hertz area in most recorded pop/rock/country/R&B/Folk, etc., music.
jheppe815 Details Discussions Posts This discussion Message User 67 posts 12-28-2021 at 05:42am Copy Comment URL Report Comment Edit Delete I'm also using the SVS isolation feet on my JBL subs and they really work. My pictures have stopped rattling and dropping to the floor.