Ground Zero GZUA 4.150SQ-PLUS Four Channel

Ground Zero GZUA 4.150SQ-PLUS Four Channel

Sound Express is an authorized dealer for Ground Zero.


The GZAU plus series of amplifiers offered by Ground Zero have been rated among the finest in the world, no joke. Rated by hifitest, car & hifi, and several other well-known organizations as one of the top 5 reference amplifiers ever built (photos above of a review on the 6 channel version). The plus series gives you the ability to set the bias of the amplifier (it lets you set the amplifier to run in class a/b or class a for better sound quality). The casing has been cut from a block of aluminum and polished as well as anodized to give it a copper color look. The amplifier features a variable crossover with plenty of options to let you run component speakers active without the use of a passive crossover. 


  • 4-channel SQ amplifier
  • Variable BIAS setting
  • Class AB technology
  • Active crossover with bypass function
  • Stable power supply
  • Gold-plated connectors
  • Flat heatsink with engraved Ground Zero lettering
  • Suitable for high-quality SQ setups






Output Power (@ 4Ω)

4x 110 Watts RMS

Output Power (@ 2Ω)

4x 190 Watts RMS

max. Output Power (CEA-2006A / 10%THD+N)

2x 460 Watts

Frequency Response

10 Hz – 30 kHz


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Bass Boost / Phasenregelung

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Remote Control

BIAS Setting

Link mode

Dimensions (b x l x h)

209 x 360 x 46 mm

    Amplifier Type

    Sound Express USA

    The Sound Experts

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