SKU: 88668798655

ESX QM-FOUR - 4 Channel Amplifier

Sale price$152.99 Regular price$169.99
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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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4.1 ★★★★★
Based on 1811 reviews
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Product Reviews
K
Verified Purchase
KV
Bozeman, US
★★★★★ 5
Quality wooden block and nice set of knives for every day use.
Color: White
Bought these for my daughter and son-in-law for their fifth wedding anniversary. Wanted to get something that looked nice and wouldn’t take a lot of room but had a nice variety. The wooden block looks so nice, not too dark-not too light. The variety of knives are perfect for every day use & handles have a nice grip. My daughter and son-in-law use them everyday and love them!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
A
Verified Purchase
Anne Wright Official
Cuba, US
★★★★★ 4
worth every penny
Color: Black, Color: Black
I was honestly surprised by how good this knife set is for the price. I previously owned a $300 knife set, and I can confidently say the Fikshot knives are just as sharp — maybe even sharper right out of the box. The blades slice through meat, vegetables, and bread effortlessly, and they still hold their edge really well after regular use. The full tang handles also feel sturdy and comfortable in hand, which makes prep work much easier. I also love how sleek and modern the black knife block looks on my kitchen counter. It feels like a premium set without the premium price tag. The built-in sharpener is a nice bonus too. My only small complaint is the kitchen scissors placement in the block. The scissors tend to rub against the slot when pulling them out, and it scratches the knife block a bit over time. It’s not a dealbreaker for me, but I do wish that part was designed a little better. Overall, this is an excellent value knife set that performs far beyond its price point. Great for home cooks, new homeowners, or anyone wanting a high-end feel without spending hundreds of dollars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
T
Verified Purchase
Taylor
Draper, US
★★★★★ 5
Finally a knife set that I love
Color: Black, Color: Black
I’ve been needing a new knife set that also came with steak knives and these are great! Very durable, has a nice weight to it, doesn’t feel cheap, great price and they came very sharp! Bonus points for coming with scissors and whatever that sharpening thingy is. Haven’t used that yet bc I don’t know how but we’ll cross that bridge when we get there.
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Reviewed in the United States on April 2, 2026
R
Verified Purchase
Rubelys
Birmingham, US
★★★★★ 5
Conives
Color: Black
Very good quality and super resistant covers.
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Reviewed in the United States on May 27, 2026
D
Verified Purchase
Dean Winchester
Waukegan, US
★★★★★ 5
Shockingly Good
Style: Heavy Duty, Style: Heavy Duty
If you’re like me (cheap), shopping for silverware is painful because it is either ridiculously overpriced or affordable yet garbage. I’m quite pleased to report that this set is very decent quality and is a fantastic value for the price, the pieces all have a little bit of weight to them, so they do not feel cheap in your hand, yet they are not these bloated, Henry the eighth hammers that are uncomfortably heavy. They are well balanced and seem to be durable..
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Reviewed in the United States on May 2, 2026

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