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Haven't had any problems with that but as this thread gets more views (some other people here have done it too) you may get other suggestions. Yeah, towers can take quite a bit but it still might be cheaper than an 'audiophile' solution.Most important areas to treat IMO are the speaker frameworks themselves followed by the front and rear baffle surfaces. The article has recommendations about this and in one of the later issues, someone wrote in about doing some big Bozaks. (I like this GETRDUN guy; he's jumping right into it!)
If No-Rez is too expensive, then get the heaviest carpet pad you can find, and glue a self adhesive vinyl floor tile to it. Then stick the tile to the cabinet. That's a better solution than any egg crate. Also, if you've got 41" sides, get some braces in there every 12" or so. No Rez is the best stuff out there, IMHO. But if you are trying to make a DIY design on the cheap, use the carpet pad.
I pretty sure that simple bracing (3 up in both directions) would be just as effective in damping the insides.
OK, that sounds like a plan! So say 3 braces in each cabinet like putting in shelves? Should I make these braces out of 3/4" MDF and maybe route out a hole in the center for the air movement to pass?
I do not know but... inside the box you need two materials:* cushioning, to add mass* deadening, to create a big virtual boxWith a viscoelastic material you add mass + elasticity that is better than only mass.With rockwool, fiberglass (better with gloves)... the second.In the past I made sandwichs wit two layers of viscoelastic (Tecsound SY70) and fiberglass (now I would do with rockwool).[IMG] http://maty.galeon.com/WP-imagenes/hum/cajas-denon-panel-fibra-tecsoundx2-quilosa.jpg
Spain, Tecsound SY 70 (7 Kg/m2), in warehouse: € 11.35 / m2. The unit is 6.16 m2.https://isolana.es/es/documentacion/tarifa-de-precios-2015/tarifa-de-precios-ap2.pdf....Jimmy Cobb - Jazz in the Key of Blue (2009) {24-96} [FLAC]https://www.amazon.com/Jazz-Blue-Jimmy-Cobb-Quartet/dp/B002M9FYFS
I built the cabinets for a 2-1/2 way design. The cabinets are 41-1/2" tall, not including the base, and are 9" wide X 15" deep. The total internal air-space is 2.25 cubic feet! This is without anything inside yet! They are made from 3/4" MDF.
Absortion != cushioning* If the boxes walls are not very thick then it is advisable to add mass or mass + elastic.* To reduce internal reflections, absorbent material is added, like rockwool, wadding and others.They are not very thick. If you want to reduce the walls vibrations...The front is very critical, there you should have a greater thickness.Absortion materials work with frequency > 500 Hz.https://www.parts-express.com/sonic-barrier-1-1-4-3-layer-acoustic-sound-damping-material-with-psa-18-x-24--260-535It is the same product that:http://gr-research.com/norez24x27sheet.aspx more expensiveIt is a comfortable solution but I do not know if it is very effective. I rely on data, graphs, measurements... Calculate how much you need and what it costs to have them in your home.The key question is how much are you going to spend in the boxes.
Sorry, but Sonic Barrier and No-Rez are not the same material. No Rez is denser and has a mass layer only next to the cabinet. Having a layer in the middle only creates a reflection surface while not dampening the cabinet. Spend the extra few bucks and buy the better product. You've been waffling on this for a week now, trying to save twenty bucks. If you want the best buy the No-Rez. If you need to save the cash, make your own version out of vinyl tiles and carpet padding. Two sheets is more than enough. You could get by with one if used on the back panel, and the middle of the sides, with home made (tile/carpet pad) filling in the top and bottom of the sides. By the way, I've actually used both in speaker designs- so this isn't just my speculation.
