I've a friend with the problem. Who has used AMS tubes. I was wondering what browns there were so I posed to an AI:
If you’ve got windows directly behind a wall (or between speakers) — for example in a listening room / home-theater / studio setup — then “dense” window dressings (thick drapes, acoustic curtains, blackout + insulating curtains, etc.) can help in two ways: 1) reduce outside noise and high-frequency reflections, and 2) absorb some of the sound inside your room to reduce echo/reverberation. (Acoustical Surfaces)
Here are some of the best-reviewed dense window-dressing options I’d consider — tuned toward sound/echo management, blackout/light control, and insulation. I grouped them roughly by how heavy-duty they are.
🛋️ Top Dense Window Dressings for Behind-Wall or Between-Speaker Windows
OEKO‑TEX Custom 3‑Layer Soundproof Blackout Curtains
Pro‑grade 3‑layer acoustic
$159.99
Sun Zero Velvet Thermal Extreme Blackout Curtains
Velvet blackout + noise dampening
$36.97
Nicetown Sound Barrier 100% Blackout Divider Curtains
Heavy blackout divider
$159.99
3HLinen Heavyweight Linen Soundproof Curtains
Heavy linen acoustic
$211.00
Moondream 3‑in‑1 Soundproof Thermal Blackout Curtains
Soundproof thermal drapes
$199.00
Heavy Weight Minimalist Blackout Curtains (Gray Wool‑like)
Heavy minimalist blackout
$157.25
KGorge Double Layer Grommet Blackout Curtains
Double‑layer blackout
$97.99
LinenWhisperHome Blackout Linen Curtains
Heavy blackout linen
$59.40
Highlights & Why They Work
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OEKO‑TEX Custom 3‑Layer Soundproof Blackout Curtains – Multi-layer construction and dense fabric make these among the most effective curtains for both blocking outside noise and absorbing sound inside. Great if you want a serious acoustic treatment rather than just decoration.
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Sun Zero Velvet Thermal Extreme Blackout Curtains – Velvet fabric adds mass and thickness, which helps reduce noise reflections and external noise by up to ~40%, while also offering blackout and thermal insulation. Good balance of function and affordability.
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Nicetown Sound Barrier 100% Blackout Divider Curtains – Heavy, insulated curtain panels designed to absorb sound significantly better than standard curtains (claimed ~2.5×), plus blackout and heat insulation. Useful if you want privacy, light control, and some acoustic dampening.
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3HLinen Heavyweight Linen Soundproof Curtains – Heavy linen gives a thick, substantial cover — works well if you prefer a more natural / textured aesthetic but still want weight, sound absorption, and thermal benefits.
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Moondream 3‑in‑1 Soundproof Thermal Blackout Curtains – A balanced all-around option: sound-reducing, blackout, thermal insulation. Good for general living rooms / listening rooms where you want light control + moderate acoustic improvement without going full “studio drape.”
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Heavy Weight Minimalist Blackout Curtains (Gray Wool‑like) – Heavyweight and dense, good for sound dampening and light blocking while giving a more minimalist, modern look — useful if you care about aesthetics as well as function.
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KGorge Double Layer Grommet Blackout Curtains – Double-layer construction adds mass and depth, improving their effectiveness for sound and light control — a solid mid-range choice for living rooms or media spaces.
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LinenWhisperHome Blackout Linen Curtains – High-weight linen panels that combine blackout capability with a thick feel — a good pick if you want a more natural fabric and moderate acoustic benefit without overly heavy drapes.
✅ What Makes Dense Dressings Suitable for Windows Behind Walls / Between Speakers
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Mass & density: Heavier / multi-layer curtains (velvet, dense linen, thermal backing) add mass, which helps block and absorb sound waves — reducing reflections from windows and walls. (Bob Vila)
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Seal & coverage: Curtains that extend floor-to-ceiling or well beyond the window reduce gaps, which is key because even small gaps let sound through. (Indow)
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Material and construction: Multi-layer, tightly woven fabrics — especially with blackout or sound-absorbing linings — outperform lightweight sheers or simple curtains for acoustic control. (Moondream Webstore)
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Dual benefit: Besides sound control, these dressings often give you light blocking and temperature insulation — helpful if the windows are behind a wall or between speakers in a room you use for media, recording, or listening. (AIM)
⚠️ What They Can (and Can’t) Do for Acoustics
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Dense curtains mostly help with mid- to high-frequency noise and reflections — not so much low-frequency bass. (Audio Science Review)
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They reduce reverberation and echo and provide moderate external noise attenuation, but they’re not a substitute for proper soundproofing (e.g., double glazing, acoustic panels, insulation). (Indow)
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Effectiveness depends a lot on how well you seal gaps around edges — curtains need to overlap the window and ideally have side seals or minimal gaps for best effect. (AAA Blind & Shutters | Little River, SC)
If you like — I can pull up 5–10 best-rated dense window-dressings specifically suited for a stereo / speaker-placement room (i.e. optimized for acoustics + minimal visual distraction).
Do you want me to build that list for you now (with price, size ranges, and approximate sound-reduction expectations)?