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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
ESX QS-FOUR 4-Channel Class D Nano AmplifierThe ESX QS FOUR is an ultra compact QUANTUM 4 channel Class D Plug+Play nano amplifier for adding real speaker power where installation space is tight. ESX specifies up to 4 x 60W RMS from a 90 x 35 x 80 mm chassis, with switchable HPF LPF filtering at 80 Hz, bridged output capability and low level outputs for adding an active subwoofer. Key specifications 4 channel Class D Plug+Play nano digital amplifier 4 x 35 45 60W RMS at 4 3 2 ohm 2 x 120W RMS
The ESX QS-FOUR is an ultra-compact QUANTUM 4-channel Class D Plug+Play nano amplifier for adding real speaker power where installation space is tight.
ESX specifies up to 4 x 60W RMS from a 90 x 35 x 80 mm chassis, with switchable HPF/LPF filtering at 80 Hz, bridged output capability and low-level outputs for adding an active subwoofer.
Key specifications
- 4-channel Class D Plug+Play nano digital amplifier
- 4 x 35/45/60W RMS at 4/3/2 ohm
- 2 x 120W RMS at 4 ohm bridged
- 2 x HPF/LPF at 80 Hz
- Dimensions 90 x 35 x 80 mm
- Efficiency up to 90%
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
4.7 ★★★★★
Based on 55 reviews
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Product Reviews
★★★★★ 1
Shelf wobbles and sits at an inclined angle after mounted.
Color: Oak, Size: 28" W x 7" D x 1.5" H (2 pieces)
While the shelf looks nice, it didn't work as it should. I anchored and screwed in the black metal bracket pretty well, and it stays perpendicular to the wall and doesn't wiggle or wobble one bit. But as soon as I slide in the wooden shelf, the whole shelf wiggles and settles at an inclined angle. Putting in the two screws down on the shelf did nothing to help with the wobbliness. I may have to glue down certain big decoration in fear of it sliding down the shelf, though that may be a bit overcautious and exaggerating.
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Reviewed in the United States on November 20, 2025
★★★★★ 5
Very good quality
Color: Black, Size: 24" W x 7" D x 1.5" H (2 pieces), Color: Black, Size: 24" W x 7" D x 1.5" H (2 pieces)
Very good quality
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Reviewed in the United States on February 4, 2026
★★★★★ 5
Easy install.
Color: Black, Size: 32" W x 7" D x 1.5" H (2 pieces)
Easy install, and very pretty. Can't go wrong with this purchase.
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Reviewed in the United States on December 12, 2025
★★★★★ 5
Solid Floating Shelves 🛠️🏠
Color: Black, Number Of Shelves: 4, Size: 15.7in
I have installed four sets of the black floating shelves in my office. They are made of high quality materials, featuring a sophisticated black woodgrain finish with a natural texture. Supposedly, each unit can handle up to 22 pounds, though I would not recommend testing that limit with your vintage bowling ball collection if you value your flooring. They are awesome.
The value is good for a set of two. Each shelf measures 22x7x1 (56x17x3 cm) inches, providing a decent amount of storage for books or decor. The installation was straightforward since the hardware for multiple wall types was included. They work well in the kitchen for spices or in the bedroom for personal belongings.
One tip for a secure fit: use a level during installation and make sure the bracket is flush against the wall before sliding the shelf on, or your photos might look like they are sliding off a mountain 📐
These shelves offer a clean, modern look and stay stable once mounted correctly. They are a practical choice for adding functional display space to any room 🖼️
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Good looking shelves and easy install - skip the included drywall anchors
Color: Black, Number Of Shelves: 2, Size: 22in
I installed these shelves in a bedroom to get things off my dresser and some decor. Once mounted they look really nice. The black finish looks clean and modern and they blend in well with the room.
Installation was pretty straightforward. The metal bracket mounts to the wall first and then the shelf slides over the bracket. As long as you take your time lining things up it’s a simple project.
One thing I strongly recommend is not using the white plastic self-drilling drywall anchors that come with the kit. I’ve used that style before on other projects and they tend to strip out easily and leave larger holes in drywall. I used better anchors instead and the shelves mounted much more securely.
The rest of the hardware worked fine and once installed the shelves feel solid and hold items well.
Pros
- Clean modern look
- Easy installation
- Feels solid once mounted
- Good size for books or decor
Cons
- The small level included isn’t very accurate — use your own level
- One of the metal brackets was slightly bent out of the box but straightened out easily
Helpful tip:
Use your own level and better drywall anchors if you have them. It makes installation easier and the shelves will mount much more securely.
Final thoughts:
For the price these are nice looking floating shelves that install easily and work well for light storage and decor.
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Reviewed in the United States on March 13, 2026
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