Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 6 - Jul 11
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
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
4.1 ★★★★★
Based on 913 reviews
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Product Reviews
★★★★★ 5
Easy to use and seems sturdy
Color: Aqua Blue
It’s perfect! Larger than or last one. Easy to set up. Fits in a standard table hole and base. The color is just what the dogs wanted! Everything is always so grey and dull! The turquoise really pops
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Reviewed in the United States on May 29, 2026
★★★★★ 4
Three tiered design makes it a winner
Color: Beige
This umbrella is extremely easy to setup. It is lightweight and because of the three tier design it adds beautiful features to your back yard.
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Reviewed in the United States on May 14, 2026
★★★★★ 1
No customer service for product under warranty
Color: Beige
loved this umbrella for the 4 months we used it. did a lot of research to find an umbrella that would stand up to New England "breezes" -- this one was advertised as wind resistant; bought in June 2025, seemed very sturdy, really nice-looking, used on our patio (installed in the base the recommended base) through the summer; stored indoors for the winter; brought back onto patio a couple weeks ago. On a day with average wind a couple weeks ago, the tilt mechanism broke. Umbrella did not fall over, a gust of wind just forced the tilt mechanism to snap. Spent a lot of time trying to fix it, but it's permanently broken. It's less than a year old so still under warranty, as stated in the materials they sent with the umbrella. Same materials list the email to contact if there are any problems with the product. Have emailed the company, twice now, asking for a refund or replacement. Radio silence. Don't buy this unless you're ok with throwing it away after four or five months of use and being ignored by customer service.
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Reviewed in the United States on May 29, 2026
★★★★★ 3
Third time in 10 years nerding out on an Amazon patio umbrella on a budget...
Color: Navy Blue, Color: Navy Blue
Color: Beautiful, but the fabric is thinner than other options that are only ~$10 more.
Tilt mechanism: Major reason for my 3:5 stars. It's plastic with a metal fastener through the middle. We won't be tilting this umbrella in any wind gust situations over 5mph. The warnings on the stickers and in the instructions make it clear this is a limitation, but it's not mentioned in the listing details.
Quality | Value for money: Overall very mid. This is a nice 3-tiered umbrella at a near rock-bottom budget price for that class. I have found other mystery brand umbrellas on Amazon that have lasted for 5+ years, albeit with some (in my opinion) acceptable fading and rust. This umbrella leans hard into plastic everywhere except the fasteners. The ribs and pole are almost as thin as a few layers of beer cans pressed together. At least at the 10' and up diameter, this umbrella requires you to install equally flimsy-feeling extensions in order to get to 10', full sail.
Final thoughts: This time around I chose price + delivery speed over quality, and I have a hunch I will be getting what I paid for. I doubt this umbrella lasts for more than 2 to 3 years without UV treatments and a very solid, heavy base.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Excellent Value.
Color: Forest Green, Color: Forest Green
Excellent value. Well made. Assembles in a few minutes. Note that the tilt control is the single click type. You push a button on the support column and tilt the umbrella until it picks in place. Venting design is helpful in keeping umbrella from tipping over in moderate wind. Fabric is a light synthetic. We chose green which we like.
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Reviewed in the United States on May 22, 2026
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