Will I benefit from a subwoofer with 20Hz speakers?

@erik_squires I really would like to take your words for it and tune my 44hz and 39 hz (+-3db) bookshelfs down to 20hz (flat like you have shown or -3db is fine). This really sounds a bit too good to be true to be honest. But before we invest further for expensive GLK panels and treat my room as you did, is it possible for you to "demonstrate" the sound reproduction from your room by some real-life recordings? I think, with all the measurement equipments you have for DSP, doing a quality recording is not that hard, right? Are you able/willing to do that for the good of the group?

https://speakermakersjourney.blogspot.com/2021/12/room-speakers-eq.html

@lanx0003

The main thing to keep in mind from my blog is that it’s based on creating a fix appropriate to the measured room. Each room will be different.

I also didn’t really attempt to boost the low bass by itself. Clipping the peaks and then just adding a bass boost with a shelving filter is not the same as trying to push speakers where they can’t go. If your speakers are down 18 dB at 30 Hz and keep going down EQ is not going to solve your problems. :)

Also, as I explained, for my Jazz/Classical mid volume listening needs I'm OK.  If you like to push the volume then even with these results a subwoofer will become more important to you.  My choices were based on measurement and values/needs.  I hope the blog gives you an example of how to go about figuring out what you need and what's important to you.

That was what I was saying "it is too good to be true" (without the aid from sub). I believe you know quite well that, in order to boost 6dB, you need to double the volume. So I wonder why do you even make fun 😀 of people when they question that as below. It is simply not doable either practically or in theory. That also lead to my next question in your post where you mentioned: "... Take my modest speakers. They use 6.5" woofers and a ported cabinet. Would you guess they went down to 20 Hz? They do..." How you achieve a flat response down to 20 Hz there? What is the frequency rating for your modest speakers (Squires SNR-1?)?

there’s no way speakers that are rated at 41 HZ are going to go down to 20 HZ in your room what kind of measurements are you using?

The words of those who don’t have a lot of practical😀 experience.

How you achieve a flat response down to 20 Hz there? What is the frequency rating for your modest speakers (Squires SNR-1?)?

Please refer to my blog!

OP: 

@dmilev73 May I have permission to use your frequency response picture on my blog??