SKU: 55289900912

Esx Quantum Digital 4Ch Amp Qe900.4

Sale price$173.25 Regular price$192.50
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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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Description

Esx Quantum Digital 4Ch Amp Qe900.4High Performance 4 Channel Class D Amplifier with Bridgeable Option Power Output: 4 x 150 Watts RMS @ 4 Ohms 4 x 225 Watts RMS @ 2 Ohms 2 x 450 Watts RMS @ 4 Ohms (Bridged) Amplifier Type: Class D Features: Highpass Filter CH1 2: 50 5000 Hz Highpass Filter CH3 4: 10 500 Hz Lowpass Filter CH3 4: 50 5000 Hz Bandpass Mode Bass Boost: 12 dB @ 40 Hz Copy Mode (CH3 4 > CH1 2) Line Outputs 2 4 CH Input Mode Included Bass Remote Start Stop Ready High Level

High-Performance 4-Channel Class-D Amplifier with Bridgeable Option

Power Output:

  • 4 x 150 Watts RMS @ 4 Ohms
  • 4 x 225 Watts RMS @ 2 Ohms
  • 2 x 450 Watts RMS @ 4 Ohms (Bridged)

Amplifier Type: Class-D

Features:

  • Highpass Filter CH1/2: 50 - 5000 Hz
  • Highpass Filter CH3/4: 10 - 500 Hz
  • Lowpass Filter CH3/4: 50 - 5000 Hz
  • Bandpass-Mode
  • Bass-Boost: 12 dB @ 40 Hz
  • Copy-Mode (CH3/4 > CH1/2)
  • Line-Outputs
  • 2/4 CH Input Mode
  • Included Bass-Remote
  • Start/Stop Ready
  • High Level Inputs with EPS
  • Auto-Turn-On
  • Efficiency: 84%

Elevate your car audio experience with our high-performance 4-channel Class-D amplifier. This powerhouse delivers 150 Watts RMS at 4 Ohms and 225 Watts RMS at 2 Ohms for each channel, providing exceptional sound quality. When bridged, it produces an impressive 450 Watts RMS at 4 Ohms, making it perfect for those seeking even more power.

The amplifier offers versatile filtering options with highpass filters for CH1/2 ranging from 50 to 5000 Hz, and for CH3/4 from 10 to 500 Hz. Additionally, there is a lowpass filter for CH3/4 with a frequency range of 50 to 5000 Hz, and a bandpass-mode for precise sound customization.

You can enhance the bass performance with the 12 dB boost at 40 Hz, and with the copy-mode functionality, the audio signals from CH3/4 can be copied and routed to CH1/2, expanding the configuration possibilities.

Featuring line-outputs and 2/4 CH input mode, the amplifier allows you to connect various audio components seamlessly. The included bass-remote provides convenient control over the bass levels, while the Start/Stop ready feature adds to the user-friendly experience.

The amplifier is equipped with high level inputs with EPS (Easy Power Supply) and Auto-Turn-On functionality, ensuring hassle-free integration into your car audio setup. With an efficiency rating of 84%, this Class-D amplifier maximizes power utilization while delivering exceptional performance.

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: 55289900912

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J24KT
San Leandro, US
★★★★★ 5
Size Does Matter
Product: Air Intake Filter Brand: EPAuto Positives: Super affordable and compact. Easy to remove and install, just loosen 4 screws and that’s it. Made with quality and durable material. The filter provides ideal airflow for the engine to function properly. Negatives: None. Overall Impression: I needed a replacement filter for my wife’s car and I didn’t want to spend a small fortune. This item was practically a steal at the list price. No need to spend more money, all the quality and longevity can be had with this filter. My wife drives her car almost every day and that means it gets a pretty good amount of use and lasts about 12 months until I decide to change them again. I would definitely recommend this product to others looking for a similar product.
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Reviewed in the United States on November 3, 2025
G
Verified Purchase
Garvit
Grantham, US
★★★★★ 4
Performance was good
my usual to go product for Honda CRV i had for long time. But last item i received I was not happy the quality seems like changed from past products. so far i had no complains. Packaging as always was solid. Performance was good. Lasted for more than mileage mentioned on the product page. Air flow is good.
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Reviewed in the United States on December 1, 2025
A
Verified Purchase
Amazon Customer
San Leandro, US
★★★★★ 5
Fits car based on Amazon rec
Fit perfect and performs as expected
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Reviewed in the United States on May 24, 2026
S
Verified Purchase
Steven M Miller
Fort Morgan, US
★★★★★ 5
Looks as good as the genuine one.
This looks like a quality product, great for the price. It looked identical to the genuine Honda part but was $20 cheaper than the Honda one.
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Reviewed in the United States on April 17, 2026
K
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kiki
Dallas, US
★★★★★ 5
Self replacement.
Good fit.
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Reviewed in the United States on April 13, 2026

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