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Description
Optimal Audio Up 4S - 4" Two-Way Ceiling Speaker, 15W,The Optimal Audio Up 4S is a discreet, two way passive ceiling speaker designed to deliver consistent coverage and full frequency sound for a variety of commercial environments. With its compact design and shallow back can, it is ideal for low ceilings while providing high quality audio for both speech and music reproduction. Features Discreet Design: The low profile and neutral white finish allow for seamless integration into ceilings with minimal
The Optimal Audio Up 4S is a discreet, two-way passive ceiling speaker designed to deliver consistent coverage and full-frequency sound for a variety of commercial environments. With its compact design and shallow back can, it is ideal for low ceilings while providing high-quality audio for both speech and music reproduction.
Features
- Discreet Design: The low-profile and neutral white finish allow for seamless integration into ceilings with minimal visual impact.
- Wide Coverage: Features a 150° conical dispersion pattern, ensuring even sound distribution across small to medium-sized spaces.
- Versatile Operation: Can be run on 70V, 100V, or low impedance systems with easy tap selection via a rotary switch behind the removable grille.
- High-Quality Drivers: Equipped with a 4" (105mm) low-frequency driver and a 0.7" (20mm) silk dome tweeter for clear and balanced audio.
- Easy Installation: Comes with an integral fixing system for straightforward mounting in ceilings with minimal cavity depth.
- Robust Construction: Built with a zinc-plated steel back can and a perforated steel grille for durability.
Specifications
- Type: Two-way, full range, passive ceiling speaker
- Frequency Response: 110Hz – 18kHz ± 3dB, -10dB @ 85Hz
- Drivers: LF: 4” (105mm) polypropylene injection moulded, HF: 0.7” (20mm) silk dome
- Rated Power: 15W (AES), 30W (Peak)
- Nominal Impedance: 8Ω
- Sensitivity: 86dB (1W/1m)
- Maximum SPL: 98dB (cont), 101dB (peak)
- Crossover: 3.5kHz passive
- Transformer Taps @ 70V: 8, 4, 2, 1, 0.5W
- Transformer Taps @ 100V: 8, 4, 2, 1W
- Dispersion: 150˚ conical
- Dimensions (inc. Grille): Ø 202mm x D 144mm (Ø 7.95" x D 5.67")
- Cut-Out Diameter: 178mm (7.01")
- Weight: 2.2kg (4.9lbs)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 2172 reviews
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Product Reviews
★★★★★ 5
Omg
Size: 3 Ounce (Pack of 1), Size: 3 Ounce (Pack of 1)
Oh. My. Goodness.
I had pretty bad acne. one day at a store I bought a travel size of one of these 10% panoxyl and tried it and omg my pimples are gone. Yes I get the occasional spots but they aren’t as terrible as before. My face is so much clearer and it even cleared a little spot of milia I had for so long! My face feels fresh everytime I use it and looks shiny and healthy. No burning for my face atleast. Doesn’t bleach if you rinse it off well. My routine is face wash, panoxyl, azelaic acid, moisturizer. Pretty simple I don’t follow influencers bc they make you buy all this junk products you don’t need for your face and for me less is better. The idea is that benzoyl peroxide essentially kills the bacteria that causes acne on your face. It works so well.
I would recommend if you’re gonna use this to patch test on a part of skin near your face could be your temple area by your ear but it’s so important so you don’t end up with burning skin if your sensitive. But otherwise it’s so great and I love it I use it everyday with occasional 1-2 day breaks cleared my acne and now my face is getting more clear! So happy I got this.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
My Favorite Face Mask for Hydrated, Glowing Skin
Scent: Collagen, Size: 4 Count (Pack of 1)
I’ve tried a lot of face masks over the years, but the BIODANCE Bio-Collagen Real Deep Mask has easily become my favorite. Every time I use it, my skin feels incredibly hydrated, smooth, and refreshed, and the results last much longer than I expected from a single mask treatment.
One of the things I love most about this mask is how deeply moisturizing it is. After wearing it overnight, my skin looks noticeably plumper and feels soft and nourished. Instead of just giving a temporary boost, I’ve found that the healthy glow lasts well beyond the next day. In my experience, my skin maintained a radiant, hydrated appearance for nearly two weeks after use, which is something I haven’t experienced with many other masks.
The hydrogel material feels comfortable on the skin and stays in place well throughout the night. When I remove it in the morning, my skin looks brighter, more refreshed, and noticeably more hydrated.
I appreciate that this mask feels like a true self-care treatment rather than just another skincare step. Whether I’m preparing for a special event or simply giving my skin some extra attention, this is the mask I consistently reach for. The fact that it comes in a multi-pack makes it even better because I always like having one available when my skin needs a boost.
Overall, this is one of the few skincare products that I continue to repurchase because I genuinely notice a difference. If you’re looking for a mask that delivers intense hydration, plumping benefits, and a beautiful long-lasting glow, I highly recommend giving this one a try.I’m
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Instant Glass Skin!
Scent: Collagen, Size: 4 Count (Pack of 1)
I’ve tried SO many sheet masks and this collagen one is genuinely one of the best. My skin looked insanely hydrated, smooth, and glowy after just one use. It fit my face really well, stayed soaked the entire time, and didn’t leave that sticky feeling afterward. The next morning my skin still felt soft and looked brighter. Perfect before events or whenever your skin needs a reset. Definitely repurchasing!!
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Absolutely amazing masks!!!
Scent: Collagen, Size: 4 Count (Pack of 1)
These masks are beyond amazing! I use one once a week and leave it on overnight after completing my p.m. skincare routine and wake up to smooth, plump, moisturized, and absolutely glowing!! I have extremely sensitive skin and eyes and these masks do not bother me at all. No burning in my eyes and no irritation of the skin. My deep wrinkles seem a lot less pronounced and some of my more fine lines almost disappear for 24 hours after using this mask. They are simple to use and adhere to the skin perfectly even after applying serums and moisturizers. Once the mask is completely absorbed and becomes clear it peels of the skin with ease. Based on the quality of these masks I am shocked by the low price, it is such a great value for your money. This Mask has become a staple in my skincare routine and I will continue to purchase these!!
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Reviewed in the United States on May 10, 2026
★★★★★ 5
instantly more hydrated + glowy skin
Scent: Collagen, Size: 4 Count (Pack of 1), Scent: Collagen, Size: 4 Count (Pack of 1)
I love this mask. It’s one of those products you can actually see a difference with right after using it.
It really helps with:
1. Deep hydration – my skin feels plump and moisturized, not dry or tight
2. Smoother texture – it softens everything and makes my skin feel really smooth
3. Glow/brightness – gives that fresh, healthy glow without looking greasy
How I use it: I apply it on clean skin (usually at night), leave it on as directed, and let it fully absorb before removing. I like using it when my skin feels dull or dry and want a quick reset.
Overall, it’s super easy to use and makes my skin look more refreshed every time. Definitely a go-to for me.
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Reviewed in the United States on April 28, 2026