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-andersen

Walk around outside and look at a Real Time Analyzer graph on yer phone...everybody has one of those, right? Note the frequency range of the normal world...go ahead...I'll wait here. See that? In any case, subs (or the rare "full range" speakers) add the bit of "life" generally missing from playback without lower frequencies. 

I use two REL S-812's in my stereo set up.  I have the crossover between 20/30 HZ and sit them right next to my Wilson Alexia speakers.  Did I NEED sub's? Absolutely not....however, they have added so much depth and soundstage to my system that I will always have subs no matter what type of speakers I own.  Goal is to have an array of 3 on each side (6 total) to further enhance the "live" experience.

Is it aiming to low if I buy for SVS SB1000? There are on sale. Or I could pay some more and buy the new SVS SB 1000 PRO

@erik_squires 100! Most def easier said than done! A month later and I’m still trying to fine tune a T9X into my room. My previous sub was a T-zero mkiii that was pretty much plug and play. This 9X is a different animal.