SKU: 88668798655

ESX QM-FOUR - 4 Channel Amplifier

Sale price$152.99 Regular price$169.99
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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19

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Description

ESX QM-FOUR - 4 Channel AmplifierSpecifications 4 Channel Class D Mini Digital Amplifier 4 x 52 90 Watts RMS @ 4 2 2 x 180 Watts RMS @ 4 bridged HPF LPF 40 4000 Hz (CH1 2) HPF LPF 40 4000 Hz (CH3 4) Bass Boost 0 6 12 dB (CH1 2) Bass Boost 0 6 12 dB (CH3 4) Input Selector 2CH 4CH Dimensions 216 x 39 x 84 mm Efficiency up to 86% Features Efficient Class D Amplifier with ultra compact dimensions Heavy die cast Heatsink with perfect cooling characteristics Auto Turn On Function High

Specifications

  • 4-Channel Class D Mini Digital Amplifier
  • 4 x 52/90 Watts RMS @ 4/2 Ω
  • 2 x 180 Watts RMS @ 4 Ω bridged
  • HPF/LPF 40 - 4000 Hz (CH1/2)
  • HPF/LPF 40 - 4000 Hz (CH3/4)
  • Bass Boost 0 / 6 / 12 dB (CH1/2)
  • Bass Boost 0 / 6 / 12 dB (CH3/4)
  • Input Selector 2CH/4CH
  • Dimensions 216 x 39 x 84 mm
  • Efficiency up to 86%

Features

  • Efficient Class D Amplifier with ultra-compact dimensions
  • Heavy die-cast Heatsink with perfect cooling characteristics
  • Auto Turn-On Function
  • High Level Inputs with Error Protection System (EPS)
  • Start/Stop Ready
  • Compact Bass Remote Controller
  • RCA Inputs & Outputs (via Molex)
  • Clipping LED

 The approximately palm-sized 2-channel mini power amplifier QUANTUM QM-TWO caused amazement right after the presentation among ESX fans and connoisseurs of the car hifi scene. The small powerhouse with a whopping 240 watts RMS output was immediately traded as an insider tip. After last year's improved V2 version with incredible 300 W RMS performance topped that again, ESX is now adding two more models in the QUANTUM QM class: The powerful QM-FOUR power amplifier is now available for 4-channel applications, who want to drive a separate subwoofer, can now use the new monoblock QM-ONE. Both power bars deliver a whopping 360 watts RMS and are visually perfectly matched. Modern and efficient Class D technology is used in all models, combined with EPS, top features and perfect sound characteristics. The QM-ONE monoblock is not only visually the perfect play partner to match the QM-FOUR. If a separate woofer is also to be fired, its area of application is clearly defined. With a full 360 watts RMS at 2 Ω, sufficient steam is provided, and the bass level can even be conveniently adjusted using the 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:
  1. 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
SKU: 88668798655

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kasxoxo
Lake Worth, US
★★★★★ 5
Love this! Sturdy and elegant
I have a small selection of jewelry pieces I wear but I needed something that would keep them all together in one place. This jewelry box is fantastic! And It fits two pairs of sunglasses on the bottom compartment. I like that there’s a little tab to help pull up the top part. It was actually a bit bigger than expected which is a good thing. And still small enough for traveling. The necklace tabs are sturdy and hold them in place. I’m very satisfied with my purchase.
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Reviewed in the United States on March 1, 2025
S
Verified Purchase
Sritika Chakladar
Birmingham, US
★★★★★ 5
Practical jewelry box
This jewelry box is both beautiful and functional. The finish looks elegant, and the compartments are well thought out for rings, earrings, and necklaces. It keeps everything organized and easy to find. The size is perfect to be carried for travel.
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Reviewed in the United States on August 14, 2025
A
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Alcyon
New York, US
★★★★★ 5
Get Bejewelled
This box is very nice. It feels sturdy. The color is true to the product picture and the material feels nice. The size is as expected. This was a gift for a young woman; she loved it and that it was cute enough to "fill space" while also being functional.
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Reviewed in the United States on July 8, 2025
K
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Kateri Solberg
Houston, US
★★★★★ 4
Great for travel or countertop
I ordered 9 of these for my four girls and all my nieces- in two of the nine, the trays sunk in without holding up, the others were great! I love how I can keep them out and they look pretty, or pack them away in luggage for easy transportation!
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Reviewed in the United States on July 12, 2025
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Abigail Bond
Battle Creek, US
★★★★★ 5
Perfect box
Very sturdy and cute jewelry box!
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Reviewed in the United States on November 22, 2025

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