We have built interior walls where the studs stand out a bit from the wall. We have prepared holes for built-in speakers, but since it will be completely "open" at the back, the sound from the speakers will spread to the backside of the wall, and the sound pressure will decrease.
Can you recommend a suitable insulation roll to seal the speakers from the back? It should ideally be a wool that is easy to insert from a smaller hole, preferably not prickly and ideally something available at a regular hardware store.
Can you recommend a suitable insulation roll to seal the speakers from the back? It should ideally be a wool that is easy to insert from a smaller hole, preferably not prickly and ideally something available at a regular hardware store.
So you're planning to build loose speaker elements? You haven't built an enclosure behind them, so it's completely "open" there? Then the right and left channels are in the same "speaker box" = not good.
I would have built a calculated enclosure behind each hole, tailored for the specific speaker element, or at least divided the right and left wall halves. Then you need to make it airtight between the wall and the ceiling/floor so that the "box"/wall doesn't leak bass. Bass should be regarded as constant air pressure when building, meaning it seeps through gaps.
Fiberglass is often used as damping because it does the job well and is cheap. Great price/performance. There are better things, but then the price/performance ratio drops.
I would have built a calculated enclosure behind each hole, tailored for the specific speaker element, or at least divided the right and left wall halves. Then you need to make it airtight between the wall and the ceiling/floor so that the "box"/wall doesn't leak bass. Bass should be regarded as constant air pressure when building, meaning it seeps through gaps.
Fiberglass is often used as damping because it does the job well and is cheap. Great price/performance. There are better things, but then the price/performance ratio drops.
Thanks for the tips steppen7. "Lösa högtalarelement" in this case are dedicated built-in speakers. These are designed to work without an enclosure. The manufacturer usually doesn't recommend an enclosure but instead suggests just insulating behind them. But maybe I should try fiberglass wool? Isn't it itchy to work with?
Okay, so they have basically tailored the characteristics of the element for an open, infinitely large baffle. However, you will still get some "short-circuiting" between the right and left if they are not separated volumes, but it may not be noticeable depending on how it is built.
But you didn't insulate the wall when you built it? Why not?
Sure, glass wool can be a bit prickly, but I don't think it's a problem if you wear full-cover clothing and gloves. A mask is also recommended, although I only used one when insulating the roof during my garage build. It's when it gets on bare skin that it pricks. You can rinse it off with cold water.
But you didn't insulate the wall when you built it? Why not?
Sure, glass wool can be a bit prickly, but I don't think it's a problem if you wear full-cover clothing and gloves. A mask is also recommended, although I only used one when insulating the roof during my garage build. It's when it gets on bare skin that it pricks. You can rinse it off with cold water.
I think steppen7 is exaggerating a bit, the importance of making separate boxes in this application. We're not talking about tuned boxes here.
If your walls are still open, I suggest you add some mineral wool boards before closing them up. It helps reduce resonances, especially if you plan to play with speakers there. Filling the space 1/2 - 2/3 is enough to achieve sufficient effect. However, try to have at least one small section with unbroken insulation from floor to ceiling somewhere between the speaker elements.
If you want to find something cheap to use as speaker damping material, something that doesn't itch in the slightest and the speaker can't blow out fibers from, go to Ikea and buy the cheapest synthetic duvet, some kind of acrylic it is, and open it up, voila, lots of nice cheap damping material. Not quite as "nice" as wool, but the price is free in comparison.
If your walls are still open, I suggest you add some mineral wool boards before closing them up. It helps reduce resonances, especially if you plan to play with speakers there. Filling the space 1/2 - 2/3 is enough to achieve sufficient effect. However, try to have at least one small section with unbroken insulation from floor to ceiling somewhere between the speaker elements.
If you want to find something cheap to use as speaker damping material, something that doesn't itch in the slightest and the speaker can't blow out fibers from, go to Ikea and buy the cheapest synthetic duvet, some kind of acrylic it is, and open it up, voila, lots of nice cheap damping material. Not quite as "nice" as wool, but the price is free in comparison.