GROUND ZERO EASY-FIT OEM DROP IN REPLACEMENT SPEAKERS

AMPLIFIER UPGRADES

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  • High efficient plug´n´play analog amplifier
  • For any vehicle with passive sound system and iso-connection
  • 2 Ohm stable Stereo
  • Power & Protection indicator
  • Variable highpass (4Ch + Sub mode)
  • Variable lowpass (Front + Sub mode)
  • Adjustable input sensitivity
  • Soft delayed turn- on
  • Thermal / Short / Overload protection
  • Including 2 m (6.56 ft) cable harness with ISO adaption

BMW OEM SUBWOOFER UPGRADE

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  • Extra flat BMW specific subwoofer with neodymium-motor
  • Klippel® optimized
  • Suitable for BMW E6.. / E7.. / E8.. / E9.. and all F-Models (other models conditionally)
  • Impedance: 2 Ohm
  • Frequency response: 35 - 250 Hz
  • SPL: 89 dB
  • Power Handling RMS: 100 WATTS
  • Power Handling Max: 160 WATTS

BMW SPEAKER UPGRADES

  • Car specific 2 way component system ”Made in Germany”
  • 4” Midwoofer with paper-fibre cone and rubber surround
  • 1.02” copper voice coil / BIMAX® spider
  • 1” titanium dome tweeter
  • Power handling: 50 W RMS / 100 W MAX
  • SPL: 87 dB / Impedance: 3 Ohm / frequency range 100 Hz – 25 kHz
  • Recommended high pass filter at 150 Hz with a slope of 12 dB/Oct 

VW SPEAKER UPGRADES

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  •  Car specific 2-way component system
  • Klippel®-optimized midwoofer with aluminum cone
  • Nomex spider
  • Copper cap for impedance linearizing
  • Resonance free steel basket
  • 1" titanium dome tweeter with variable connection including installation frame and 3 dB level adjustment 

OEM REPLACEMENT 3.5" COAX

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  • 3.5" Coaxial OEM Replacement Speaker
  • High quality coax speaker with coated paper cone
  • Resonance free steel basket
  • Rubber surround
  • Superdome tweeter with 6 dB crossover 

OEM REPLACEMENT 4x6 COAX

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  • High quality coax speaker with coated paper cone
  • Resonance free steel basket
  • Rubber surround 
  • Superdome tweeter with 6 dB crossover 

GROUND ZERO AMPLIFIERS

GZPA Reference 2PURE

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 2 Ch Class AB > A

- 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 


2 Ch Class AB > A

Output Power @ 4 Ohm (CEA*)
2 x 420 W

Output Power @ 2 Ohm (CEA*)
2 x 750 W

Output Power @ 1 Ohm (CEA*)
2 x 1150 W 

Bridge mode @ 4 Ohm (CEA* / 10% THD) 1 x 1800 W

Bridge mode @ 2 Ohm (CEA* / 10% THD) 1 x 2700 W

GZPA Reference 4PURE

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 4 Ch Class AB > A

- 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 


4 Ch Class AB > A

Output Power @ 4 Ohm (CEA*) 4 x 150 W

Output Power @ 2 Ohm (CEA*) 4 x 270 W

Output Power @ 1 Ohm (CEA*) 4 x 425 W

Bridge mode @ 4 Ohm (CEA* / 10% THD) 2 x 650 W

Bridge mode @ 2 Ohm (CEA* / 10% THD) 2 x 1000 W

GZPA Reference 2SYM

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  2 Ch Class AB > A 

- High-End pure sound quality amplifier
 - 1 Ohm stable stereo / 2 Ohm bridged
 - Symmetrical dual-mono layout
 - Shielded and separated dual power supply
 - Continuously variable Bias Setting Class AB -> nearly Class A    
 - Phase shift adjustable 0 – 180°
 - Highpass / Subsonic adjustable 20 – 400 / 200 – 4000 Hz
 - Lowpass adjustable 20 – 400 / 200 – 4000 Hz
 - Bandpass adjustable 20 – 4000 Hz
 - Bypass-function to put all filters out of operation
 - Adjustable input sensitivity
 - Soft delayed remote turn-on  
 - Power & Protection indicator
 - Bass remote control
 - Thermal, over current, speaker short, Speaker DC protection
 - Temperature-sensitive controlled fan
 - Plexiglas bottom plate
 - White LED illumination inside
 - Selected high-end SANKEN® transistors
 - Ground Zero exclusive Mundorf Mcap® capacitors
 - Copper anodized aluminum strand cast heatsink 

 

Output Power @ 4 Ohm (CEA*)
2 x 420 W

Output Power @ 2 Ohm (CEA*)
2 x 750 W

Output Power @ 1 Ohm (CEA*)
2 x 1150 W

Bridge mode @ 4 Ohm (CEA* / 10% THD) 1 x 1800 W

Bridge mode @ 2 Ohm (CEA* / 10% THD) 1 x 2700 W

GZPA Reference 4SYM

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  4 Ch Class AB > A 

- High-End pure sound quality amplifier
 - 1 Ohm stable stereo / 2 Ohm bridged
 - Symmetrical dual-2 channel layout
 - Shielded and separated dual power supply
 - Continuously variable Bias Setting Class AB -> nearly Class A    
 - Highpass / Subsonic adjustable 40 - 3000 Hz
 - Lowpass adjustable 40 - 3000 Hz
 - Bandpass adjustable 40 - 3000 Hz
 - Bypass-function to switch-off each filters out of operation
 - 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
 - Selected high-end SANKEN® transistors
 - Ground Zero exclusive Mundorf Mcap® capacitors
 - Copper anodized aluminum strand cast heatsink 


Output Power @ 4 Ohm (CEA*) 4 x 150 W

Output Power @ 2 Ohm (CEA*) 4 x 270 W

Output Power @ 1 Ohm (CEA*) 4 x 425 W

Bridge mode @ 4 Ohm (CEA* / 10% THD) 2 x 650 W

Bridge mode @ 2 Ohm (CEA* / 10% THD) 2 x 1000 W

GZUA 2.250SQ-PLUS

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  2 Channel fullrange class A/B 

- 1 Ohm stable stereo
 - Adjustable BIAS control (for each pair of channels separately)
 - High End WIMA® Capacitors
 - Latest BURR-BROWN® operational amplifiers
 - Status LED
 - Wide-band adjustable high pass & low pass filters
 - Band-pass feature with activated LPF & HPF
 - Adjustable input sensitivity
 - Soft delayed remote turn on
 - Bass remote control (with activated LPF)  
 - Phase shift control (with activated LPF)
 - Bass boost control from 0 - 12dB @45 Hz
 - Thermal / speaker short circuit / overload / over current protection
 - Temperature sensor controlled cooling fan 

 

Output Power @ 4 Ohm (CEA*) 2 x 180 W

Output Power @ 2 Ohm (CEA*) 2 x 320 W

Output Power @ 1 Ohm (CEA*) 2 x 500 W

Bridge mode @ 4 Ohm (CEA* / 10% THD) 1 x 700 W

Bridge mode @ 2 Ohm (CEA* / 10% THD) 1 x 1200 W

GZUA 4.150SQ-PLUS

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  4 Channel fullrange class A/B 

 - 2 Ohm stable stereo
 - Adjustable BIAS control (for each pair of channels separately)
 - High End WIMA® Capacitors
 - Latest BURR-BROWN® operational amplifiers
 - Status LED
 - Wide-band adjustable high pass & low pass filters
 - Band-pass feature with activated LPF & HPF
 - Adjustable input sensitivity
 - Soft delayed remote turn on
 - Thermal / speaker short circuit / overload / over current protection
 - Temperature sensor controlled cooling fan 

 

Output Power @ 4 Ohm (CEA*)
4 x 110 W

Output Power @ 2 Ohm (CEA*)
4 x 190 W
Bridge mode @ 4 Ohm (CEA* / 10% THD) 2 x 460 W

GROUND ZERO AMPLIFIERS & PROCESSORS

GZUA 6.200SQ-PLUS

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     6 Channel fullrange class A/B 

 - 2 Ohm stable stereo
 - Adjustable BIAS control (for each pair of channels separately)
 - High End WIMA® Capacitors
 - Latest BURR-BROWN® operational amplifiers
 - Status LED
 - Wide-band adjustable high pass & low pass filters
 - Band-pass feature with activated LPF & HPF
 - Adjustable input sensitivity
 - Soft delayed remote turn on
 - Thermal / speaker short circuit / overload / over current protection
 - Temperature sensor controlled cooling fan 

 

Output Power @ 4 Ohm (CEA*)
4x 110 W + 2x 160 W

Output Power @ 2 Ohm (CEA*)
4x 160 W + 2x 280 W

Bridge mode @ 4 Ohm (CEA* / 10% THD) 2x 380 W + 1x 640 W

GZDSP 4.80AMP

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 - 4-channel amplifier with integrated 8-channel signal processor (DSP)
 - High efficient 2 Ohm stable class D amplifier
 - 6-channel line input (RCA)
 - 6-channel high-level input (with auto-on function)
 - AUX input (3.5 mm socket)
 - TOSLINK input (sampling rate up to 24-bit/96kHz)
 - Plug for optional interface (wireless music streaming)
 - 4-channel line output (RCA)
 - 8-channel signal processor (DSP) - Cirrus Logic single core 32-bit/192 kHz
 - Realtime setup of all functions (via PC)
 - Simple handling, one-page graphical user interface (Windows compatible)
 - Channel separated parametric equalizer (6x 31 band / 2x 11band)
 - Channel separated time alignment (0-15 ms / 0-510 cm)
 - Adjustable crossover (HPF / LPF / BPF) in the range of 20 Hz to 20 kHz
 - Selectable crossover slope (6 to 48 dB/Oct)
 - Selectable phase shift for on channel (0˚ or 180°)
 - Memory for 10 user presets (selectable with optional remote control)
 - Two optional remote-control units available (GZDSP Remote or GZDSP Touch-Remote)
to adjust main and subwoofer level, select the presets and input mode
 - LED power and status indicator (protection circuit)
 - Power on delay
 - High temperature / short circuit / overload protection circuit)  


Output Power @ 4 Ohm (CEA*)
4 x 80 W

Output Power @ 2 Ohm (CEA*)
4 x 130 W

GZDSP 6-8X PRO

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  - 8-channel digital signal processor (DSP) - Cirrus Logic 32-bit/192 kHz single core chipset
 - 6-channel line input (RCA)
 - 6-channel high-level input (with auto-on function and audio summing)
 - AUX input (3.5 mm socket)
 - Optical and coaxial digital input (sampling rate up to 24-bit/192 kHz)
 - 8-channel line output (RCA)
 - Simple handling user interface (Windows ® compatible)
 - Realtime setup of all functions (via PC)
 - Channel separated parametric equalizer (6x 31 band / 2x 11band)
 - Channel separated time alignment (0-15 ms / 0-510 cm)
 - Adjustable crossover (HPF / LPF / BPF) in the range of 20 Hz to 20 kHz
 - Selectable crossover slope (6 to 48 dB/Oct)
 - Selectable phase shift for each channel (0˚ or 180°)
 - Adjustable filters (Butterworth) HPF / LPF / BPF with a slope of 6 – 48 dB/Oct.
 - Selectable phase shift on each channel (0˚ or 180°)
 - Memory for 10 user presets (selectable with optional remote control) 

GZDSP REMOTE PRO

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  - Selection of up to three different input sources (MAIN/AUX/OPTICAL))
 - Setting the main and the subwoofer level
 - Calling one of 10 presets
 - LED display for level and preset 

GZHA MINI ONE

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     1 Ch Class D 

- High efficient class D mini amplifier  

- Extreme compact size  

- 2 Ohm stable stereo (MINI TWO / FOUR)  

- 1 Ohm stable mono / 2 Ohm linkable (MINI ONE)  

- High-level input with Auto-On  

- 12 dB adjustable bass boost (@45 Hz) (MINI ONE)  

- Adjustable wide-range filters  - Adjustable input sensitivity  

- Bass remote control  (MINI ONE & MINI TWO)  

- Thermal / short circuit / overload protection 

Output Power @ 4 Ohm (CEA*) 1 x 220 W

Output Power @ 2 Ohm (CEA*) 1 x 390 W

Output Power @ 1 Ohm (CEA*) 1 x 630 W

GZHA MINI FOUR

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        4 Ch Class D 

 - High efficient class D mini amplifier
 - Extreme compact size
 - 2 Ohm stable stereo (MINI TWO / FOUR)
 - 1 Ohm stable mono / 2 Ohm linkable (MINI ONE)
 - High-level input with Auto-On
 - 12 dB adjustable bass boost (@45 Hz) (MINI ONE)
 - Adjustable wide-range filters
 - Adjustable input sensitivity
 - Bass remote control  (MINI ONE & MINI TWO)
 - Thermal / short circuit / overload protection 

 

Output Power @ 4 Ohm (CEA*)
4 x 80 W

Output Power @ 2 Ohm (CEA*)
4 x 130 W
Bridge mode @ 4 Ohm (CEA* / 10% THD) 2 x 320 W

GROUND ZERO SUBWOOFERS

GZPW Reference 250

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  High End 25 cm / 10" Subwoofer with linearized and Klippel-optimized high power motor
  - Resonance free cast basket
  - 3-Layer sandwich cone
  - Double layer BIMAX® spider
  - 50 mm / 2" Copper voice coil with 2 x 2 Ohm
  - Designed for smallest enclosures 

 

Cone 3 Layer sandwich

Power Handling 500 WRMS

Impedance 2 x 2 Ohm

GZPW 15XMAX

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 - High power 15” subwoofer
 - Klippel® optimized
 - Massive aluminum cone
 - 4” flat wire CCA voice coil 
 - 3-layer high-roll surround
 - Progressive 4-layer Nomex spider
 - 10 mm² / 7 AWG connection cable with 4.92 ft length
 - Massive aluminum cast basket 


Voice coil 100 mm / 4" Flat Wire

Cone Aluminum

Power Handling 6000 WRMS

Impedance 2 x 1 Ohm

GZNW 15XMAX & GZNW 12XMAX

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  15" and 12" Models Avaialable 

 - High power 15” subwoofer
 - Klippel® optimized
 - Massive aluminum cone
 - 3” round wire CCA voice coil 
 - 3-layer high-roll surround
 - Progressive 4-layer Nomex spider
 - 10 mm² / 7 AWG connection cable with 4.92 ft length
 - Massive aluminum cast basket 


Cone Aluminum

Power Handling 4000 WRMS

Impedance 2 x 1 Ohm

GZUW 8SQX & GZUW 10SQX

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     8" & 10" Models Available 

 - Aluminum cast basket
 - Pressed and coated paper cone
 - 2 x 2 Ohm copper voice coil
 - Kapton former
 - Audiophile POLYCOT spider 


Cone Reinforced paper

Power Handling 8" 300 WRMS / 10" 450 WRMS

Impedance 2 x 2 Ohm

GZHW - 16 (6.5"),20 (8"),25 (10"),30 (12"),38 (15")SPL

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6.5",8",10"12" & 15" Models Available 

- High power SPL subwoofers
 - Klippel® optimized
 - Efficient triple magnet 
 - Massive aluminum cast basket
 - Reinforced paper cone
 - 3” copper voice coil 
 - High-Roll sandwich surround
 - Double spider
 - Also available as Gold, Pink and Green edition 


Power Handling 700-2500 WRMS

GZRW 8FL

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8" Flat Woofer (Flat 10" & 12" also available)

- High-strength, extremely flat IMPP Cone
 - Aluminum dust cap
 - 36 mm / 1.42” Copper Voice Coil
 - Extra flat 55 mm / 2.17"
 - Wide band performance 30 – 600 Hz
 - Usable as subwoofer or powerful kick woofer in door and free air applications


Power Handling 150 WRMS / 250 WMAX

Impedance 2 Ohm