PERFECT 10w x 18d x 9h room, any good?

10 w? Not nearly perfect as that will place any speakers too close to boundaries regardless... However if you are thinking the ratio is perfect due to 10 wide 18 deep well than thats possible... But again you will have very limited width to get those speakers breathing. You will need some extensive room acoustics most likely, including some way to especially control the immediate reflection points on the right and left walls to the speakers, along with probably some good diffusion to spread that sound out cramped in the very narrow 10 feet wide space..

I would almost suggest running the system on the long wall instead however your seated position would be way too close that way as well. I have in the past seen and heard systems jammed into a 12 foot wide area and it was about the limit I could see fitting some kinda soundstage with acoustic treatments into the room.. And even then you almost end up with system that can be pretty flat without a lot of 3d and pretty high amounts of distortions coming off those sidewalls…

I consider for most speakers big or small a room of minimum 14 wide, but preferably somewhere in the 16 to 17 feet wide, and 20 to 30 deep. But we all have to work with what we have!!

By the way I had a fully Pro treated room that was 13 wide by 18 deep, it was pretty good with treatments, and just horrible without, The smaller the space the more acoustic treatments it almost needed to get things clearly in control. Right now I have the same setup however in a room that has my speakers minimum 8 feet off the sidewalls so its about 21 feet wide.. WOW what a difference, and it outperformed the thousands invested in the smaller room acoustics right off the bat, so don't minimize the effect your 10 feet wide area will ultimately have on the performance, however its better than nothing.

Exactly ratios are just math... Fact is space is going to be needed regardless in order to create a stereo acoustic environment... I mean we could say a 3ft wide hallway 10 feet long and 6 feet high is a perfect ratio in a listening environment.. Obviously for bose cube speakers maybe and somebody thats about 4 foot tall!!

I am just kidding, but its gonna be a challenge in this room, you will most likely save some time and money doing some sort of reasonable acoustic treatments, probably consisting of some diffusion and absorbsion product, otherwise you might end up with a tunnel effect, or be listening at such a huge toe in and so close that you might as well put on headphones :-)

You might want to start with just some stacked GIK Tri traps, which at about 300 bucks a pair do well in smaller rooms with helping soundstage and bass response placed in the corner behind speakers.

I would call them and ask how they handle really small studios and like control rooms for monitoring recordings etc...

In the end all you can do is give it a shot for free, you own the room.. Tweak around and see what happens.

Good luck

Magfan
I understand, not sure you see what I was actually saying.. Too small is going to be too small an acoustic space regardless of a Phi ratio. I agree there is definitely an optimal ratio I am sure.. Point being if your forced into a room barely as wide as my bathroom you got a problem no matter how good a "Ratio" it is was the point. But the smaller the area almost the more the acoustic treatments somebody might end up needing in the end to correct it.