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Description
Quantum Audio QPX2800.4 4-Channel 1440W RMS QEA Series Class A/B AmplifierQPX2800. 4 4 Channel Stereo Amplifier 3600 Watts FEATURES: Class A B Circuitry 2 Ohm Load Stereo Capability Amber Glow Logo Badge Audiophile Grade Components Speaker Short Circuit Protection High Efficiency Mosfet Design 12 dB Variable High Pass and Low Pass X over Selectable: 0, 6, 12 dB Octive Bass Boost Buffered Line Output for Easy Daisy Chaning SPECIFICATIONS: Dynamic Power : 3600 Watts 4 x 180 Watts @ 4 Ohm Stereo 4 x 360 Watts @ 2 Ohm Stereo 2
- QPX2800.4 4 Channel Stereo Amplifier / 3600 Watts
- Class A/B Circuitry
- 2 Ohm Load Stereo Capability
- Amber-Glow Logo Badge
- Audiophile Grade Components
- Speaker Short Circuit Protection
- High Efficiency Mosfet Design
- 12 dB Variable High Pass and Low Pass X-over
- Selectable: 0, 6, 12 dB/ Octive Bass Boost
- Buffered Line Output for Easy Daisy-Chaning
- Dynamic Power : 3600 Watts
- 4 x 180 Watts @ 4 Ohm Stereo
- 4 x 360 Watts @ 2 Ohm Stereo
- 2 x 600 Watts @ 4 Ohm Bridged
- Ch 1-2 High Pass Crossover: 60Hz-1.2KHz
- Ch 3-4 High pass Crossover: 60Hz-1.2KHz
- Ch 3-4 Low pass Crossover: 50Hz – 400Hz
- X-Over Slope: 12dB
- Bass Boost @ 45Hz: 0-12dB
- Input Sensitivity: 285Mv – 6V
- Signal to Noise Ration >90dB
- THD at 1%: <0.1%
- Length: 13.7” / 348mm
- Width: 8.6” / 220mm
- Height: 1.96” / 50mm
FEATURES:
SPECIFICATIONS:
DIMENSIONS:
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.3 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Maestro House Mini Coffee Scale
I have begun to drink tea, pu’erh tea to be specific. I have several varieties and I have had a problem with getting consistent results. The varieties can be very different in size depending on when the leaves are harvested (leaves harvested in spring are much smaller). So the easiest way to get consistent results is by weight. This scale is very easy to use with a ceramic tea scoop, set the tea scoop on the scale, zero it out and add tea leaves. This has made my results much better, without the wild swings in strength I had been getting before trying to eyeball even measures. This scale gives me accurate measurements to one tenth of a gram.
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Reviewed in the United States on April 15, 2026
★★★★★ 4
Mostly great, except one little annoyance
Color: Black&Silver, Color: Black&Silver
Pros- lightweight, small, very accurate, easy to clean, timer included.
Cons- I use this to brew espresso on my Breville Touch and to get an accurate reading, you have to place something flat (structured) under the scale. Otherwise the reading just jumps all over the place. I know lot of espresso machines have the same base, so this might be an issue for some!
This is my reason for 4/5 stars. It’s an easy fix, it’s just kind of annoying. Value for the price seems to be on point. It’s easy to clean. It has a timer as well as scale (nice for espresso). Buttons work the first time you push them.
That’s it that’s all
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Reviewed in the United States on January 31, 2026
★★★★★ 5
Good Value
Color: Black
Good quality SS cup. Not much else to say.
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Reviewed in the United States on February 26, 2026
★★★★★ 5
Absolutely fantastic
Color: Black, Color: Black
Absolutely solid product and would recommend this to anybody as a wide mouth espresso measuring cup.
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Reviewed in the United States on February 7, 2026
★★★★★ 5
Nice cup!
Color: Silver
Nice measuring cup. I appreciate the pretty wooden handle. Using this espresso measuring cup has upped my latte game considerably!
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Reviewed in the United States on November 28, 2025