room setup suggesion needed

@deep_333 

Ok let's clarify some things first, as far as I see you speak numbers and diagrams language so it will be easy for both of us.

You are one of us who use subwoofers, so let's do some logical calculations and see if it makes sense.

1. human can hear from 20Hz to 20KHz but in reality adult person will loose some of the top hearing so maybe 15-17KHz tops.

2. Best subwoofers operating  from 30 Hz to 50Hz, anything less like 25Hz and below will not be sound it will be more like pulse.

3. JBL 4367 speakers  delivering sound from 30Hz to 40KHz

So now, how is your theory of missing subwoofer works exactly when my speakers match frequency of the best woofers out there?

The idea of HIFI stereo was to replicate sound recorded or performed as true as possible and as realistic as the sound itself, so by definition adding components to the system that emitting sounds below hearing range, just to create boom effect makes no sense in my book. When you go to cameral quartet concert there is no amplifiers or speakers you sit and you listen people playing instruments, now those instruments recorded you replicating home on your HIFI it should sound exactly the same, there is no jackhammers under concert floor to create vibrations they do not exist just for the thrill of the spectators.

Now coming to the sound wave shown on your diagram, can you drop the ceiling another foot down to 8' I would love to see what will happen with the bounce of sound after the ceiling was adjusted.

What will happen with 38Hz point, if it will bounce  before 7.25 mark or after.

@ssg308 Wrote:

@ditusa ok I get the concept but execution could be tricky since they weight 157 lb each,

Ok.

The JBL 4367's are great speakers! See my system page, left speaker, I raised 9'' off the floor (the speakers weight 275 lbs each and are 36'' tall, 39'' wide, 20'' deep). I also decoupled the speakers, from the floor with concrete and lead It took two people to put the speaker on the blocks. Raising and decoupling the speakers from the floor improved the sound quality in my system and the cost was low. For more details see here. JBL speaker stands see here.😎

Mike

@ditusa  so what does rising speakers off the ground, and if I bolt the frame to the wall would it do the same effect ?

@ssg308 Wrote:

@ditusa so what does rising speakers off the ground,

Rising the speakers off the floor puts the horn at ear height. Decoupling the speakers from the floor prevents sound transmission from the speakers entering into the floor and floor vibrations entering into the speakers (it’s a two way street).

and if I bolt the frame to the wall would it do the same effect ?

What is important is to break the sound transmission from the speakers and the structure. See here. 😎

Mike

@ditusa My speakers are 38" tall she horns are already on exactly same level as ears, so I can skip rising them. Now creating dampening platform that would separate speaker from the structure can be tricky but I can see logic behind it, it seam to be cuter to subwoofer idea where people deliberately dumping huge boom in to the floor in order to cheat the ears and other senses.

I need to do some thinking about the heavy pads. Would it be ok to set it up on 10" steel injection mold ?