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  Topic Review (Newest First)
02-24-17 11:47 PM
Primare Knob
Re: MartinLogan ESL Speaker Review Discussion Thread

Quote:
AudiocRaver wrote: View Post
My only suggestion is to refer to the ratios in the current setup guide, which has served us pretty well so far.
Printing it now as we speak.

Hopefully I will be able to use your new guide to design my HT. I still have a few months before the build can actually start.

Thanks for all your hard work.
02-24-17 04:58 PM
AudiocRaver
Re: MartinLogan ESL Speaker Review Discussion Thread

Quote:
Primare Knob wrote: View Post
I could not find any measurements about dimensions for speaker placement.
Terrific questions all. I will try to fill in some blanks, but some of your answers might have to wait for my rewritten setup guide, in the works. Hopefully done in the next few months.

Final Placement:
43 in = LP to speaker plane (plane that runs from center to center of the speakers)
67 in = spkr to spkr
64 in = spkr plane to front wall

Quote:
I am not familiar with the term Sharp Reflections, what do you mean by this? Are these early reflections?
Yes, controlled early reflections "tuned" to be constructive to soundstage development.

Quote:
Example 3 suggest taht placing the speakers close to the side walls could work. Have you tried this?
I have not. Room symmetry does not allow this in my listening area. Also, the angle of the side reflection is critical and side walls might not support that precise angle.

Quote:
Example 4 doesn't make much sense since there are no (Sharp) reflections point in the direct path between speaker and LP. You mentioned a follow up post about using the slats. Have you been able to post that?
The vertical panel on the right of the diagram is the source of the sharp reflection.

I am working on a complete rewrite of my setup guide. Other than that, no, sorry.

Quote:
With example 3 you mentioned later on in the article that this setup produces big variations with small differences in placement. Could you not compensate that by changing the angle of the reflection panel?
Yes, in fact that is precisely what I do now. The next version of the setup guide will show this. Again, sorry.

Quote:
You speak about pitch and roll in the article but roll would suggest turning the speaker around the front to back axis.
Correct. I have to pay attention to that in my listening laboratory because of a slightly uneven concrete basement floor (100% covered by carpet in the listening area). Speaker heights do not match, nor do other speaker setup parameters, without measurements and careful compensation. I nave custom DIY stands which are used to compensate for all of these variables.

Quote:
From all article that I have read about Martin Logan speaker I have found this one the most informative and the sound stage that I am chasing after myself, but my room is pretty narrow only 133in in width while ML recommend placing the speakers 96in-108in apart and at least 24inch from the side walls.
My only suggestion is to refer to the ratios in the current setup guide, which has served us pretty well so far.
02-22-17 02:34 AM
AudiocRaver
Re: MartinLogan ESL Speaker Review Discussion Thread

Great questions, you are stretching the limits of my memory banks.

I will follow with a post tomorrow (Wednesday) with answers. The promised follow-up is in process at this time, a complete rewrite of my Speaker Setup Guide. My goal is to publish it in April. It will contain a lot of detail, including theory.
02-22-17 12:30 AM
Primare Knob
Re: MartinLogan ESL Speaker Review Discussion Thread

Great review and it is nice to see someone who is willing to go through such lengths and also write about it.

I do have a few points of discussion or comments about your article.

I could not find any measurements about dimensions for speaker placement.
I am not familiar with the term Sharp Reflections, what do you mean by this? Are these early reflections?
Example 3 suggest taht placing the speakers close to the side walls could work. Have you tried this?
Example 4 doesn't make much sense since there are no (Sharp) reflections point in the direct path between speaker and LP. You mentioned a follow up post about using the slats. Have you been able to post that?
With example 3 you mentioned later on in the article that this setup produces big variations with small differences in placement. Could you not compensate that by changing the angle of the reflection panel?
You speak about pitch and roll in the article but roll would suggest turning the speaker around the front to back axis.

From all article that I have read about Martin Logan speaker I have found this one the most informative and the sound stage that I am chasing after myself, but my room is pretty narrow only 133in in width while ML recommend placing the speakers 96in-108in apart and at least 24inch from the side walls.
07-05-14 10:14 PM
Savjac
Re: MartinLogan ESL Speaker Review Discussion Thread

Conceivably it should work as the woofer in this speaker goes up quite a bit above 80hz. It is kind of a cheap project, maybe $5 or so and worth experimenting with.
07-05-14 08:43 PM
|Tch0rT|
Re: MartinLogan ESL Speaker Review Discussion Thread

Thanks for the pic and the previous reply. I figured it would be something that simple but I like to visually see things. So your drywall screws are the spikes for the board into the carpet? I use a sub crossed over at 80hz would this mod make much difference for me? Most of the bass seems to be from the subs anyway. I've been meaning to play with the rake a bit by buying some hockey pucks and put the them under the rear spikes. I've seen this before over at MLO I think.
07-04-14 12:04 PM
Savjac
Re: MartinLogan ESL Speaker Review Discussion Thread

Here is a rough photo of how they sit on boards. These boards have not been painted and the speaker will look crooked in the photo due to some angles of it but there are four long course thread drywall screws in each of the corners of the board. I drilled pilot holes first and then ran the drywall screws almost all the way through. I then put a spirit level on the board to get it flat in all directions and then the speaker was placed atop that. I kept the spiked feet on mine so theoretically there is double isolation but i am not sure that helps or not.

07-03-14 07:39 PM
AudiocRaver The marble slab was mostly a fast way to get something solid under the speakers to hear the improvement it would give. In retrospect, I should have taken the time to get wood cut to the proper size and gone that route. The marble slab demonstrates the bass improvement, but I have not found a good way to tie them down so they don't move around if they get bumped.

With the wood piece, it sounds like screwing into the carpeting with the tip of the screw against the concrete slab would give pretty good stability. I will be implementing that in the near future.
06-25-14 05:47 PM
Savjac
Re: MartinLogan ESL Speaker Review Discussion Thread

I have not tried the marble slab but when using wood, cut a single or double thick piece of 3/4" mdf and drill 4 holes near the corners that are a bit smaller than the wood screws you will use as spikes. The wood screws should be long enough to penetrate the wooden slab, the carpet and with a bit left over for adjustments so ensure the wood is level on all four sides. A spirit level would be good to use before the speakers are placed atop the wood, and make sure that the wood base is nice and level and the screws are tight to the floor. Once done with that, screw the spikes on the bottom of the speakers all the way in and carefully place them on the wood. I made the wood bases large enough so you can change the angle of the speakers in the horizontal plane a bit as needed.

Its that simple.
06-20-14 07:54 PM
|Tch0rT|
Re: MartinLogan ESL Speaker Review Discussion Thread

Can we get some pics of the solid slab tweak? My ML EM ESL's are just on regular plywood (I dunno, not a construction guy lol) and carpet with the stock spikes with the rubber numbs removed (I think I still have them...). So would I just buy the slabs, stick them under the speakers and then put the rubber nubs back on over the spikes? I think I've seen people do that and then spike the slab to the carpet too.
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