Ground Zero GZPA Reference 4PURE SQ 4ch SQ Amplifier 


4-channel ultimate high end amplifier with pure direct signal layout, BIAS adjustment and best quality selected parts for the most sophisticated listener´s demands

High-End pure sound quality amplifier
• 1 Ohm stabile stereo / 2 Ohm bridged
• Symmetrical dual-mono direct-signal layout
• Shielded and separated dual power supply
• Continuously variable Bias Setting Class AB -> nearly Class A
• Adjustable input sensitivity
• Soft delayed remote turn-on
• Power & Protection indicator
• Thermal, over current, speaker short, Speaker DC protection
• Temperature-sensitive controlled fan
• Plexiglas bottom plate
• White LED illumination inside
• High quality Rhodium RCA plugs
• Selected high-end SANKEN® transistors
• Low distortion LM4562 OP with 0.00003% THD+N
• Ground Zero exclusive Mundorf Mcap® capacitors
• Special made audio-optimized Mundorf secondary capacitors for maximum buffering
• Capsuled ALPS potentiometers with channel separated level adjustment and summarize-function
• Low-tolerance Vishay Dale emitter-resistors for accurate bias point stabilization
• Copper anodized aluminum strand cast heatsink 

High-End 4-channel SQ amplifier
Symmetrical layout
Class AB technology
Pure direct signal path
Variable BIAS setting
Exclusive high quality components
Rhodium coated RCA sockets
Exclusive heatsink with engraved Ground Zero lettering
Acrylic bottom plate with LED illumination
Highest Sound Quality – without compromises!

Model
High-End SQ amplifier

Channels
4

Output Power (@ 4Ω)
4x 150Watts RMS

Output Power (@ 2Ω)
4x 270 Watts RMS

Output Power (@ 1Ω)
4x 425 Watts RMS

max. Output Power
2x 1000 Watts

Frequency Response
5 Hz – 38 kHz

HPF / LPF / BPF
○ / ○ / ○

Bass Boost / Phase Shift
○ / ○

High-Level Input / Auto-on
○ / ○

Remote Control

BIAS Setting

Linkmode

Dimensions (w x l x h)
236 x 590 x 67.5 mm