Help: Designing Small Mixing Room in Condo

good news! it was just a loose connection.. only $120 in labor to fix!

Cool! The new data is looking more consistent between left and right.

Just ran some new tests too... I definitely am in need of the rear wall treatment.

Yup. ... That huge spike with the long tail at 134 Hz is your 3.0.0 mode. 3rd harmonic, front/back axial mode. Back wall needs LOTS of treatment... The big dip at about 90 Hz is likely your 2.0.0 mode. The flip side of the same one above: 2nd harmonic, instead of third. And the big humpy thing at around 45 Hz is yet another aspect of the same issue! That's your 1.0.0 mode. fundamental. It is probably smaller than the others in the graph because your speakers don't go down that low, but it's clearly there. So yup: rear wall needs major attention! There's other stuff going on in there too, but that huge hairy axial monster is masking them: it will be easier to see them once you kill that thing. You better order some "dragon slayer" special super hyper ultra traps for your back wall! :) One other thing: Those speaker stands are going to need a lot more mass on them. They aren't hefty enough like that.... - Stuart -

Soundman2020 wrote:

You better order some "dragon slayer" special super hyper ultra traps for your back wall! :) One other thing: Those speaker stands are going to need a lot more mass on them. They aren't hefty enough like that....

haha! definitely will get on that :mrgreen: For the speaker stands would I be ok using Isoacoustics stands on them? (http://www.isoacoustics.com/isol8r430_s ... onitor.php) Or should I rebuild them with maybe 1.25-1.5" MDF? Thanks for your help on the graphs

For the speaker stands would I be ok using ... stands on them?

Well, I suppose you could if you don't mind spending a lot of money on items of questionable performance... On the other hand, for a few bucks you could put some tried-and-proven Sorbothane pads under the speakers, and get excellent isolation. Those fancy stands would not solve the issue of lack of mass. Stand need to be MASSIVELY heavy. Some people stack up concrete blocks, others use hollow stands filled with sand. Right now, I'm working with a customer in the USA who is building his stands from 1/4" steel pipe... not that the pipe is 1/4" diameter, but that the steel itself is 1/4" thick! The pipes are 6" diameter, welded to a 1/2" steel plate base, and with a steel grid shelf on top for the speaker. That too will be sand filled. Sorbothane pads both under the entire thing, and also under the speaker. Overkill, perhaps, but he certainly has the right idea! Those speakers will be absolutely isolated and very well decoupled from the floor... That's what I mean by massively heavy. :)

Or should I rebuild them with maybe 1.25-1.5" MDF

Something just a little heavier would be in order... :) - Stuart -