Martin Logan Speakers Setup Advise

S

sutage

Audiophyte
Hello All,

I have home theater 7.1 setup with Martin Logan speakers. My Front Speakers are Motion 40 , Center is Motion 50, Atmos are Electro-motion IC and Back Surround are Electro-Motion IW. I have ML Dynamo 1500 as Subwoofer. To support this speakers I have installed Denon AVR X4500H. Attached are the installation pictures for reference. I have put my speakers behind wall and made cutout as shown in Pictures.
Audio Levels :
==========
Center Audio : -1.5 db
Subwoofer 1 : 0 db
Low Frequency Effects -10 db
Speaker Config :
============
Front - Large
Center - Small
Surround & Surround back - Small

My Problem with Setup is the the heavy base or any type of loud music, i dont get the sound output in correct way. Example F1 racing scenes with bang on wall scenes, I have tested in my home theater setup in basement vs on My definitive sound Wstudio sound bar in living room. I am getting Wstudio sound much clear and correct compared to my Home theater setup with ML speakers.

Appreciate, if you can advise me or suggest any ML sound / installation specialist to help me with this issue.

Thanks In Advance !
Sachin
 

Attachments

Kingnoob

Kingnoob

Audioholic General
I don’t think you need a specialist just either Turn bass down on amplifier or get used to loud scenes .
I don’t understand what you mean because I don’t really watch racing . But looks like an epic set up .
Ml sub is smaller it shouldn’t be that loud ehh ?


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T

TankTop5

Audioholic Chief
In wall speakers have crossovers designed specifically for being flush mounted with the wall, floor standers are not. You may end up needing them to protrude a little from the wall. Also your Motion 40’s are rear ported creating lots of bass in your false wall and that may be where the bass is coming from. Try plugging the ports on your speakers and see what happens.
 
ryanosaur

ryanosaur

Audioholic Spartan
I has a sad.
It’s like the Dirty Dancing scene where he says, “Nobody puts Baby in a corner!” Except it’s about speakers and a cage.
Tank top hit on it.
You have fundamentally failed at proper set up.
Your Speakers and the Subwoofer are meant to be in free space. They are not designed for in-wall or infinite baffle setup.
Not only by closing the ports away, are you failing though.
You are getting likely a 6dB boost to any frequency with a wavelength greater than half the width of the baffle. And because you tried to be so clever, there is no way of even knowing if that subwoofer is anywhere near a decent spot for good acoustics.

Shame. Those are nice speakers. Too bad.
 
William Lemmerhirt

William Lemmerhirt

Audioholic Warlord
YeH these guys are totally right. I should’ve looked at the pdf first. Basically you’ve isolated a lot of the acoustic output to outside the room. Speakers such as yours are not made to function in that way. I figured small setting, and maybe a trim bump would at least help. While the sub isn’t a lot of users first choice, it should definitely get the job done there. Hate to say but I think you need a reboot. You’re trying to go racing on flat tires.
 
T

TankTop5

Audioholic Chief
To think of it another way, your speakers aren’t speakers, your room is a speaker and you put half of it in another room. That other room is acting like a large subwoofer that your processor can’t EQ.
 
Kingnoob

Kingnoob

Audioholic General
To think of it another way, your speakers aren’t speakers, your room is a speaker and you put half of it in another room. That other room is acting like a large subwoofer that your processor can’t EQ.
well said he’s using full sized speakers like in wall models .

His accident would be like a dream for me ....
He wanted to hide his speakers and doubled there bass output lol



move the subwoofer back into the room if you don’t want it so loud .


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S

sutage

Audiophyte
Appreciate everyone for their replies.
Now with given scenario, can only bringing the subwoofer outside in free air help ?
Or I should get Left, Right, Centre and subwoofer all outside in air ?
 
ryanosaur

ryanosaur

Audioholic Spartan
All.

None of those are designed to be "Installed" like that.

If you really have no other choice in the long run, you need to identify dedicated in-wall speakers which are designed for that infinite baffle effect.

Proper set up:
You should have an absolute minimum of 6" from wall to back of speaker. 18" would be preferable. Same for the distance from any side wall, if possible.
The tweeters on the ML Motions are not known to have the best dispersion, so you will need to toe them in towards your Listening Position. If you sit in the middle, you should still be able to see a very little bit of the inner sides of the L/R speakers.
The center channel should be ideally put on its own stand. Something like these, for example:
...And it should be aimed at your head and shoulders, ideally, as you are sitting.
For the Subwoofer, I always recommend the Subwoofer Crawl to learn about and identify the best performing locations in your room where the Sub will have the most effect.
***Watch the video :)

Of course, it is your system, your room. That said, if you want the gear to perform to its possible best potential, then these criteria ar some basics that will help. :cool:

Also, remember to run your room correction when you make changes. Keep speakers set to small, with an 80Hz Crossover to begin with, perhaps 100Hz for the Center. Follow instructions for setting the subwoofer gain.

You will hear a completely different sound than you are currently experiencing.
 

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