SKU: 49328764643

ESX QM-FOUR-PP - 4 Channel Amplifier

Sale price$108.00 Regular price$120.00
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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

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Description

ESX QM-FOUR-PP - 4 Channel AmplifierSpecifications 4 Channel Class D Plug+Play 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 Adapter Harness for Power Quadlock Head Units (5 m) Efficient Class D Amplifier with ultra compact dimensions Heavy die cast Heatsink with

Specifications

  • 4-Channel Class D Plug+Play 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

  • Adapter Harness for Power Quadlock Head Units (5 m)
  • 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.

The QM-FOUR-PP Plug&Play Edition is ideal for reinforcing a factory system. Only one condition has to be met for this: The radio must be equipped with a modern Quadlock plug ex works. In this, the loudspeaker plug insert can be easily removed and connected to the enclosed 5 meter cable harness of the QM-FOUR-PP. Finally, the QM amplifier only needs to be supplied with power and that's it!


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: 49328764643

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4.2 ★★★★★
Based on 18 reviews
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M
Verified Purchase
M. P*****k
Lake Worth, US
★★★★★ 1
DO NOT BUY! DO NOT BUY! DO NOT BUY!
Color: Black, Color: Black
Absolute garbage chair. Only had for six month and the mesh on the seat has already come apart after using it for my home office. Chair was squaking after only three months and now I can't even sit in it cause it sags. Can't even get my money back for this cheap garbage.
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Reviewed in the United States on May 7, 2026
C
Verified Purchase
Country Doug
Lowell, US
★★★★★ 5
Very comfortable with good lower-back support
Most comfortable, well made, easy assembly office-gaming chair (very pleased)! *I suggest, HOLD-OFF popping the seat onto the upper-cylinder until AFTER assembling the back-rest onto the seat/arm-seat with back-rest as a unit...can then be popped onto the upper gas-cylinder(Much more stable than fighting with chair freely rolling and turning) while attempting to aligning the holes assembling the back-rest. Afterwards the seat with back-rest assembled can easily be popped onto to the upper-end of the gas-cylinder and we are good to go! * do pay attention to using the correct bubble-packed bolts for each assembly, as directed * all the holes align -up very precisely... so if screwing in the bolt(s) and after a couple-turns it gets hard-to-turn, we are 'cross-threading the bolt into the threaded hole...so back-out and realign the bolt as so it threads in very easy. * the bubble-pack of bolts are clearly labeled so as we easily know which ones go where. *0ne bubble-packet even includes a spare group just in case we lost one (like out in the grass-lawn)? * Included a T-handle alien-head wrench (all needed for total assembly) very nice for having around if any re-tightening needed. all speaks Quality! >>> Been using about a month now...And I REALLY like this office gaming chair _ very comfortable cushioned well and excellent lower-back support _ the faux-leather seems to be more thick and durable and stitching is NOT ripping-out (as my previous & more expensive chair had done with it's paper-thin faux leather) _ easy assembled chair seems very sturdy and solid, (yet light weight), in moving around, (not some wobbly contraption as my previous more expensive chair). _ a strong Five-Star rating!
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Reviewed in the United States on March 14, 2025
J
Verified Purchase
john draudt
Draper, US
★★★★★ 5
nice chair for the money
This is a great chair for those not wanting to spend a lot of money and well built and sturdy. I don't do gaming so I'm looking at it as a computer chair so that's what my review will focus on. I had no trouble putting it together as it has a nice instruction book and not a one page print out like most China made products. Also the enclosed Allan wrench with a handle was someone's smart idea. It looks good (I also bought it since it was red) it's comfortable and fit's my needs but I can't comment on the durability factor as I have it for just a few days but I have no complaints for the price I paid at this time.
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Reviewed in the United States on November 19, 2024
A
Verified Purchase
Aaron.K
Boise, US
★★★★★ 5
I Recommend!
very comfortable chair ive had it for a while now, it starts to get a faint creaking noise, but nothing unbearable. the cushions are firm yet comfortable at the same time. its not too big of a chair, fits great in my room. for the price , its pretty good quality, same could be said for its reclining, depending on how you set the tension of the reclining, the chair can be reclined with ease, or tight. this chair was easy to use and to set up. I very much recommend.
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Reviewed in the United States on September 13, 2025
T
Verified Purchase
Trisha Randall
Alexandria, US
★★★★★ 5
Great chair at a great price point.
This item was easy to put together, it was comfortable and visually stunning to look at. My toddlers are able to climb in and out as the chair remains stable. It’s simple to recline, and does so smoothly. The quality is great especially for the price point
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Reviewed in the United States on July 7, 2025

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