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 13 - Jul 18

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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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wanda shufford
Fort Morgan, US
★★★★★ 5
Men’s suit
Size: X-Large, Color: Black & Gold-2pcs
This suit fits and looks great definitely worth it and would buy it again.
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Reviewed in the United States on March 27, 2026
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Tuns
Battle Creek, US
★★★★★ 4
Good Suite but Supplier needs attention to details
The suite is okay. The attention to details of the seller needs consideration. I ordered similar suite in black and gold in size 3XL. I was sent Size "XL". It took me some time to return it. If they do not have the right size, they must not send the wrong one.
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Reviewed in the United States on March 2, 2026
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JET
San Leandro, US
★★★★★ 5
Impressed and Content
Size: Small, Color: Black & Gold-2pcs
I was very impressed with the quality of the material given the price range. The desired size was exactly on point from what I projected. Still needed alterations naturally but will definitely do business in the future.
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Reviewed in the United States on April 9, 2026
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Angela Parker
Pawtucket, US
★★★★★ 5
Detail
Size: XX-Large, Color: Black&gold -Jacket
Fits perfectly
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Reviewed in the United States on April 10, 2026
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Kaden Wireman
Whiting, US
★★★★★ 5
great suit!
Size: X-Large, Color: Black & Silver-2pcs
great suit! just get a size bigger than normal
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Reviewed in the United States on May 17, 2026

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