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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21
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Description
ESX QM500.4 - 4 Channel AmplifierSpecifications 4 Channel Class D Mini Digital Amplifier 4 x 80 125 Watts RMS @ 4 2 2 x 250 Watts RMS @ 4 bridged HPF 50 5000 Hz (CH1 2) HPF 10 500 Hz (CH3 4) LPF 50 5000 Hz (CH3 4) Copy Modus CH3 4 > CH1 2 Bandpass Mode Dimensions 220 x 51 x 362 mm Efficiency up to 83% Features Advanced Class D Technology with very high Efficiency Selected and audiophile tuned Components Compact Aluminum Heatsink and lateral Die cast Parts High Level Inputs with Error
Specifications
- 4-Channel Class D Mini Digital Amplifier
- 4 x 80/125 Watts RMS @ 4/2 Ω
- 2 x 250 Watts RMS @ 4 Ω bridged
- HPF 50-5000 Hz (CH1/2)
- HPF 10-500 Hz (CH3/4)
- LPF 50-5000 Hz (CH3/4)
- Copy-Modus CH3/4 > CH1/2
- Bandpass Mode
- Dimensions 220 x 51 x 362 mm
- Efficiency up to 83%
Features
- Advanced Class D Technology with very high Efficiency
- Selected and audiophile tuned Components
- Compact Aluminum Heatsink and lateral Die-cast Parts
- High Level Inputs with Error Protection System (EPS)
- Auto Turn-On Function
- Start/Stop Ready
- MOSFET PWM Power Supply
- 3-Way Protection Circuit
- RCA & High Level Inputs (via Molex)
- Compact Bass Remote Controller
Digital amplifier power has never been more compact and affordable: With a size of just 190 x 35 x 102 mm, the three new ESX QUANTUM QM miniature power plants are convincing all along the line. The QM amps offer state-of-the-art technology in a very small space and are all solidly constructed. All three amps are based on the somewhat larger sibling models of the ESX QUANTUM QL series, only a bit more compact and much easier to install. Thanks to the high level inputs including EPS and the automatic turn-on function, they are also perfectly suited for integration in factory sound systems. Each model is also equipped with a compact bass level remote control.
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 18 reviews
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Product Reviews
★★★★★ 5
Great quality and perfect desk organizer
Color: Brown
Great quality and perfect desk organizer
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 27, 2026
★★★★★ 5
Great product.
Color: Black
Material looks fancy, appearance was great, sturdy performance. Great size for all accessories.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
Well-Built, Masculine, Watch and Jewelry Case
Color: Espresso, Color: Espresso
The description here on Amazon is very accurate, but I have to say the quality is beyond what I expected! The material is soft with a nice leather feel to it. And the small details, from the stitching to the hinges to the clasp appears to be very high-quality. It came in a very nice package, and was well protected during shipping. The one thing I really liked about it was that the dividers in some of the compartments are able to be removed, offering a little more versatility as far as storage goes (see pics). The case has a very masculine look to it, which goes with the larger chronographs I have. It also has plenty of space for accessories, such as extra watch bands.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 22, 2025
★★★★★ 5
Procase Men's box
Color: Espresso
Got this for my boyfriend for Christmas. We love it! The latch locks well. Decent size, good quality, might get another one for myself in the future
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
★★★★★ 4
Overall recommended for the price
Color: Espresso, Color: Espresso
Pros:
Looks fantastic, just like the pictures
The latch feels solid
Packaging was nice and it arrived undamaged
Price is good for what it is
Cons
Durability of the fake leather on the inside is questionable, I don’t think this is something you’ll be handing down to your kids or anything like that
This thing has a smell that I’ve never smelled before but it is quite unpleasant… hopefully that fades after a bit but it’s really not nice at all out the gate
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
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