room setup suggesion needed

@ssg308 Wrote:

room setup suggesion needed

I would raise the JBL speakers about 8’’ off the floor, with a slight toe in, see here. 😎

Mike

@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

@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

@ssg308, bass boom does not come from speakers or subwoofers. Bass boom is a product of room distortion see here.

Mike

@ssg308 Wrote:

@ditusa My speakers are 38" tall she horns are already on exactly same level as ears, so I can skip rising them. 

Another reason for raising the speakers off the floor is woofer floor bounce which can also effect the upper and lower midrange. See page four in the article here. For what its worth, JBL made a speaker with a concrete base; notice the woofer height about 12'' or more off the floor in the pic see here.😎

Mike

@erik_squires Wrote:

The truth is it's often a matter of money and space that determines what we use.  EQ's are relatively inexpensive, and easy to hide.

By golly gee, I agree! 😁

@ssg308 Wrote:

@ditusa I measured my speakers and I need to lift them about 5" to get it to 12" formula

According to JBL engineer Greg Timbers, 14’’ off the floor is good. His home speaker woofer designs are around 12’’ to 14’’ off the floor. See JBL Everest one, two and the 250TI, the L250, and L300, see here. Flush mounting the speakers in the wall and about 3’ off the floor is best, maybe not always practical see here. I would say raising the speakers about 3’ off the floor takes the floor out of the equation, now its just the four walls and ceiling to deal with. For what its worth. I started with with 4’’ from the floor to the bottom of the woofer frame I’m content with 14.5’’. For your information, my speakers were designed for studio control rooms for mixing and mastering so if there a little above ear level it will not matter as the sound remains the same see here. With all the talk about bass and subwoofers, I like the way my speakers pressurize every square inch of the room, its a visceral feeling as well as eargasmic just like a live event. 😎

Mike