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Description
BLAM RELAX BL-100RS - 4" 2 Way Component Speakers (PAIR)Take your music experience to a new level with the 4 Inch (100mm) Relax 100 RFS speaker set from BLAM. This set brings state of the art technology and high quality sound at a low cost. The Relax 100 RFS is the latest update to the popular 100RS standalone series and offers an extended reproduction range for low and high frequencies. Thanks to its high sensitivity and two ohm voice coils, this set is ideal as an upgrade for your car. Installation is
Take your music experience to a new level with the 4 Inch (100mm) Relax 100 RFS speaker set from BLAM. This set brings state of the art technology and high quality sound at a low cost. The Relax 100 RFS is the latest update to the popular 100RS standalone series and offers an extended reproduction range for low and high frequencies. Thanks to its high sensitivity and two-ohm voice coils, this set is ideal as an upgrade for your car. Installation is easier with the new, robust composite chassis and the compact distribution filters for the tweeters.
Product Features
- 2 x 100 mm (4″) woofers
- 2 x 20 mm soft dome tweeters
- 2 x 6 dB/octave high-pass crossovers.
- Max power 100 W
- Nominal power 50 W
- Frequency response 80 Hz – 30 kHz
- Sensitivity 90.3 dB
- Impedance 2 Ω
Technical Features (Speakers)
- Original BLAM composite basket reinforced with fiberglass
- High quality treated cellulose pulp membrane
- Butyl rubber surround
- Long life “Conex” damper
- 25 mm (1”) voice coil on Kapton former
- 70 mm x 15 mm ferrite magnet
- Thick magnetic circuit (4 mm)
- High quality 20 mm (3/4”) soft dome tweeter
- 6 dB/octave high pass crossover
- Tweeter level adjustable to 0 dB or attenuated to -3 dB
Technical Specifications (Speakers)
- Component Speaker
- Max power 100 W
- Nominal power 50 W
- Impedance 2 Ω
- Freq. Response 80 Hz - 15 kHz
- Sensitivity (2,83V/1m) 90.3 dB
- Magnet Ferrite
- Magnet size Ø x h 70 x 15 mm 2.756‘’x 0.591‘’
- Total driver displacement 0.11 l 0.004 cf
- Weight of one component 0.578 kg 1.274 lb
- Voice coil Ø 25 mm 0.984“
- Voice coil height 8.4 mm 0.331“
- Cone Cellulose pulp
Technical Parameters
- effective Ø (d) 84 mm
- Sd 55.42 cm²
- Xmax 2 mm
- Re 2.6 Ω
- Fs 109.87 Hz
- Le 97.33 µH @ 1 kHz
- L2 157.34 µH @10 kHz
- Vas 1.76 L
- Mms 5.16 g
- Cms 0.000407 m/N
- BL 3.49 Tm
- Qts 0.66
- Qes 0.77
- Qms 4.72
Supplied Accessories
- Mounting screws
- Mounting accessories for tweeters
- User manual
Are 10cm/ 4 inch speakers good for my vehicle?
4-inch or 10cm speakers are a compact audio solution that delivers impressive sound quality in a small package. Ideal replacements in popular smaller 3-door cars like the Vauxhall Corsa D and select Alfa Romeo, Fiat, and BMW, these lightweight speakers can easily be installed in rear doors, ensuring an unobtrusive fit. Despite their size, they produce powerful and immersive audio, making them perfect for music lovers who seek clarity without the bulk of larger equipment. Whether you're upgrading your vehicle's sound system or simply looking to reduce the size of your car audio set up, 4-inch speakers provide a remarkable audio experience that doesn’t compromise on performance.
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
4.0 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Five stars for BOKA without hesitation.
Size: Pack of 1, 4 Ounce, Set name: A. Ela Mint
I have tried a lot of natural toothpastes over the years and I can honestly say that Boka completely surprised me in the best possible way. From the very first use it felt like I had finally found a toothpaste that balances modern science with a clean ingredient philosophy. You will not be disappointed.
The standout ingredient here is nano hydroxyapatite, which is the same mineral that naturally makes up tooth enamel. That immediately caught my attention because instead of simply masking dental issues it actually supports remineralization. After learning more about nano hydroxyapatite and how it interacts with enamel I felt confident giving this toothpaste a real trial. The texture is smooth and creamy and it spreads easily across the teeth. Some fluoride free toothpastes can feel chalky or thin but this one feels refined and well formulated. It produces a gentle foam that feels pleasant while brushing but never overwhelming.
The flavor is another area where this toothpaste shines. It is refreshing without being harsh or overly minty. My mouth feels clean and balanced after brushing rather than blasted with artificial intensity. That subtle freshness actually lasts much longer than I expected.
After about two weeks of consistent use I started noticing that my teeth felt smoother throughout the day. That polished feeling you normally get right after a dental cleaning lasted longer than usual. My teeth also appeared brighter which was a welcome bonus.
Another thing I appreciate is the ingredient transparency. There are no questionable additives and it is completely fluoride free which is important for people who prefer alternatives that still support enamel health. Knowing that nano hydroxyapatite is widely used in advanced dental care products in other parts of the world made this even more compelling.
The packaging is clean and modern and the tube dispenses easily without making a mess on the cap. It feels like a premium product from start to finish. What really impressed me is how well this toothpaste balances effectiveness, comfort, and thoughtful formulation. It manages to feel gentle while still leaving my teeth incredibly clean and refreshed. If you are looking for a high quality fluoride free toothpaste that focuses on enamel support and a healthier approach to oral care then I highly recommend giving this one a try. It has absolutely earned a permanent place in my daily routine and it is one of the few natural toothpastes I genuinely look forward to using every day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
★★★★★ 5
Great toothpaste.
Size: Pack of 1, 4 Ounce, Set name: B. Whitening
This is by far really great toothpaste. I can tell the difference in the color of my teeth. And sometimes my teeth are kinda sensitive to harsh toothpaste. But this is good for sensitive teeth. And minty flavor is not to strong either. Try it. I hope it works for you as well as It does for me. 🤗
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
★★★★★ 4
Gentle and Pleasant to Use
Size: Pack of 2, 1.3 Ounce, Set name: A. Ela Mint
This toothpaste feels gentle on sensitive teeth and has a clean, refreshing taste without being too strong. The texture is smooth, and it leaves my mouth feeling fresh after brushing.
I also like that it uses nano hydroxyapatite instead of fluoride, which makes it an interesting alternative to traditional toothpaste.
Overall, a good toothpaste for sensitive teeth and daily use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Good product
I got these are way nicer then they look on here. So far they are holding up well. I keep my soap in it, it is not too hard but not too soft. I feel clean after I used it. Unfortunately, it comes wrapped in plastic, not individually but in just one plastic case. Trying to stay away from plastic but other than that works fine
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Reviewed in the United States on April 11, 2019
★★★★★ 4
Compact exfoliation. Good for travel.
Nice exfoliating product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2019
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