GZREM 4-A

Small profile cable remote

Remote control for CAR SPECIFIC series amplifiers

compatible with GZCS SW-600A/800A/1000A, GZCS 20/25 SUB-ACT
Including connection wire 500 cm
Control function: main level

Type	Wired remote Control
Housing	black

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GZCS SW-600A

9. October 2026 / groundzero

Magnifier

GZCS SW-600A

15 x 20 cm (6″ x 8″) under-seat active subwoofer

180 Watts max

15 x 20 cm (6″ x 8″) high quality flat active subwoofer with aluminum cast enclosure

Ultra-flat mounting height
Incl. remote control
120/180 Watts amplifier
Aluminum cast housing
High level input
Automatic turn-on function
Low pass filter
Phase correction
Incl. wiring kit

Type	Active Subwoofer Box
Diameter	15 x 20 cm / 6″ x 8″
Amplifier power (RMS/max.)	120 / 180 Watts
Model	Under-seat mounting
Frequency response	15 – 150 Hz
Low pass filter	50 – 150 Hz
Phase setting	0° / 180°
Enclosure	Cast aluminum
Remote control	included
Dimensions (l x w x h)	260 x 194 x 71 mm / 10.24″ × 7.64″ × 2.80″

Produkt Info

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GZ GRILL 10.0

5. October 2026 / groundzero

Magnifier

GZ GRILL 10.0

25 cm / 10″ Protection grill

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Loudspeaker protection grill

25 cm / 10″ Protection grill

Two-part protective grille, consisting of grille and mounting ring
Solid loudspeaker protection grille
Including GZ logo plate
Fitting for GZCM 10.0XSPL/GZCM 10XSPL/GZCW 10PROC
max. speaker outer diameter: 260 mm / 10.24″
max. speaker mounting diameter: 234 mm / 9.21″
Content: 1 piece protection grille

GZUA 2SQX

23. September 2026 / groundzero

Magnifier

GZUA 2SQX

High-performance 2-channel SQ amplifier

High-performance SQ amplifier

2-channel sound quality amplifier with class A/B circuit, BIAS adjustment and filterless signal path

2-channel SQ amplifier
Variable BIAS setting
Class AB technology
Filterless signal path
2 ohms stable in bridged mode
Soft delayed remote turn-on
Gold-plated connectors
Massiv heatsink with engraved Ground Zero lettering
Suitable for high quality SQ setups

Type	Sound quality amplifier
Channels	2
Output Power (@ 4Ω)	2x 175 Watts RMS
Output Power (@ 2Ω)	2x 300 Watts RMS
Output Power (@ 1Ω)	2x 500 Watts RMS
max. Output Power (CEA-2006A / 10%THD+N)	1100 Watts
Output power (@ 2Ω) bridged	1000 Watts RMS
Frequency Response	10 Hz – 52 kHz
HPF / LPF / BPF	○ / ○ / ○
Bass Boost / Phase Shift	○ / ○
High-Level Input / Auto-on	○ / ○
Remote Control	○
BIAS Setting	●
Linkmode	○
Dimensions (w x l x h)	195 x 360 x 53 mm / 7.68″ x 14.17″ x 2.09″

Owner’s Manual – EN

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GZUA 4SQX

23. September 2026 / groundzero

Magnifier

GZUA 4SQX

High-performance 4-channel SQ amplifier

High-performance SQ amplifier

4-channel sound quality amplifier with class A/B circuit, BIAS adjustment and filterless signal path

4-channel SQ amplifier
Variable BIAS setting
Class AB technology
Filterless signal path
Soft delayed remote turn-on
Gold-plated connectors
Massiv heatsink with engraved Ground Zero lettering
Suitable for high quality SQ setups

Type	Sound quality amplifier
Channels	4
Output Power (@ 4Ω)	4x 125 Watts RMS
Output Power (@ 2Ω)	4x 235 Watts RMS
max. Output Power (CEA-2006A / 10%THD+N)	2x 440 Watts
Output power (@ 4Ω) bridged	2x 350 Watts RMS
Frequency Response	10 Hz – 52 kHz
HPF / LPF / BPF	○ / ○ / ○
Bass Boost / Phase Shift	○ / ○
High-Level Input / Auto-on	○ / ○
Remote Control	○
BIAS Setting	●
Linkmode	○
Dimensions (w x l x h)	195 x 360 x 53 mm / 7.68″ x 14.17″ x 2.09″

Owner’s Manual – EN

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GZUA 6SQX

23. September 2026 / groundzero

Magnifier

GZUA 6SQX

High-performance 6-channel SQ amplifier

High-performance SQ amplifier

6-channel sound quality amplifier with class A/B circuit, BIAS adjustment and filterless signal path

6-channel SQ amplifier
Variable BIAS setting
Class AB technology
Filterless signal path
Soft delayed remote turn-on
Gold-plated connectors
Massiv heatsink with engraved Ground Zero lettering
Suitable for high quality SQ setups

Type	Sound quality amplifier
Channels	6
Output Power (@ 4Ω)	4x 110 + 2x 160 Watts RMS
Output Power (@ 2Ω)	4x 175 + 2x 280 Watts RMS
max. Output Power (CEA-2006A / 10%THD+N)	2x 425 + 650 Watts
Output power (@ 4Ω) bridged (CH1-4)	2x 340 Watts RMS
Frequency Response	10 Hz – 52 kHz
HPF / LPF / BPF	○ / ○ / ○
Bass Boost / Phase Shift	○ / ○
High-Level Input / Auto-on	○ / ○
Remote Control	○
BIAS Setting	●
Linkmode	○
Dimensions (w x l x h)	195 x 550 x 53 mm / 7.68″ x 21.65″ x 2.09″

Owner’s Manual – EN

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GZRB 16SPL-EXTREME

18. September 2026 / groundzero

Magnifier

GZRB 16SPL-EXTREME

16.5 cm / 6.5″ vented SPL subwoofer loaded enclosure

700 Watts SPL

Passive vented enclosure including 6.5″ RADIOACTIVE SPL subwoofer

6.5″ vented SPL subwoofer loaded enclosure
Subwoofer GZRW 6XSPL
Vented enclosure
Bass tunnel
Wooden enclosure
Improved SPL performance
Push terminal

Type	SPL Subwoofer Box
Diameter	16,5 cm / 6.5″
Power handling (SPL)	700 Watts
Impedance	2x 2 Ohms
Netto volume	10.5 L / 0.37 cu.ft.
Subwoofer	GZRW 6XSPL
Dimensions (w x h x d)	356 x 206 x 270 mm / 14.02″ x 8.11″ x 10.63″

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GZHW 10-D2 FLAT

17. September 2026 / groundzero

Magnifier

GZHW 10-D2 FLAT

25 cm / 10″ high quality flat subwoofer

1000 Watts SPL

10″ high quality flat subwoofer with alumiunum cast basket

10″ high quality flat subwoofer
Klippel® optimized
Sandwich paper cone
Durable U-shape rubber surround
Solid aluminum cast basket
63 mm / 2.5″ copper voice coil
4-layer copper voice coil
Push terminal

Type	High-Quality Flat Subwoofer
Diameter	25 cm / 10″
Power handling (RMS/SPL)	600 / 1000 Watts
Impedance	2x 2 Ohms
Efficiency	85 dB
Power recommendation	400 – 1000 Watts
Voice coil	63 mm / 2.5″ copper
Cone	Sandwich paper
Max. excursion (Xmax)	29 mm / 1.14″
Mounting Ø	238 mm / 9.37″
Mounting depth	103 mm / 4.06″
Resonance frequency (Fs)	35.5 Hz
Damping ratio (Qts)	0.434
Equiv. air volume (Vas)	19.7 L / 0.70 cu.ft.

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GZCA 300.4

15. September 2026 / groundzero

Magnifier

GZCA 300.4

4-channel competition SPL amplifier

Compact high-power amplifier

4-channel 1-ohm stable full range SPL high power amplifier with class D circuit and integrated active crossover

SPL high power amplifier
Class D technology
Variable active crossover
full range frequency responde
Stable high voltage power supply
Large terminals
Solid heatsink with Ground Zero lettering
Compatible with many e-cars (see the manual)
Particularly qualified for SPL and SQL applications

Type	Competition SPL amplifier
Kanäle	4
Output Power (@ 4Ω)	125 Watts RMS
Output Power (@ 2Ω)	230 Watts RMS
Output Power (@ 1Ω)	360 Watts RMS
max. Output Power (CEA-2006A / 10%THD+N)	1800 Watts
Output power (@ 2Ω) bridged	2x 715 Watts RMS
Frequency Response	10 Hz – 20 kHz
HPF / LPF / BPF	● / ● / ○
Bass Boost / Phase Shift	○ / ○
High-Level Input / Auto-on	○ / ○
Remote Control	●
BIAS Setting	○
Linkmode	○
Dimensions (w x h x l)	220 x 150 x 64 mm / 8.66″ x 5.91″ x 2.52″

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GZCA 3000X.M2

10. September 2026 / groundzero

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GZCA 3000X.M2

Mono competition SPL amplifier

High-power class D amplifier

1-channel 1-ohm stable SPL high power amplifier with class D circuit, integrated active crossover and bass boost

SPL high power amplifier
High-efficient class D technology
Variable active crossover and bass boost
Particularly qualified for SPL and SQL applications
Stabilized high voltage power supply
Large terminals
Flat heatsink design in classic GZ style
Wired bass level remote control included

Model	Competition SPL amplifier
Channels	1
Output Power (@ 4Ω)	1825 Watts RMS
Output Power (@ 2Ω)	3180 Watts RMS
Output Power (@ 2Ω)	4500 Watts max
Frequency Response	10 Hz – 18 kHz
HPF / LPF / BPF	● / ● / ●
Bass Boost / Phase switch	● / ○
High level input / Auto-on	○ / ○
Remote	●
BIAS Setting	○
Linkmode	○
Dimensions (W x L x H)	277 x 150 x 58 mm / 10.91″ x 5.91″ x 2.28″

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GZNW 25C

4. September 2026 / groundzero

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GZNW 25C

25 cm / 10″ high performance subwoofer

3000 Watts

10″ high performance subwoofer with airflow optimized aluminum cast basket

10″ high performance subwoofer
Klippel® optimized
Carbon-fiber cone
Airflow optimized aluminum cast basket
75 mm / 3″ copper voice coil
2-layer Polycot spider
Carbon-fiber dust cap
Massive push terminals

Ausführung	High-Performance SPL Subwoofer
Durchmesser	25 cm
Belastbarkeit (RMS/SPL)	1500 / 3000 Watt
Impedanz	2x 2 Ohm
Wirkungsgrad	83 dB
Leistungsempfehlung	1000 – 3000 Watt
Schwingspule	75 mm Kupfer
Membran Ausführung	Carbon
Max. Auslenkung (Xmax)	45 mm
Einbau Ø	238 mm
Einbautiefe	216 mm
Resonanzfrequenz (Fs)	42 Hz
Gesamtgüte (Qts)	0,5
Äquiv. Luftvolumen (Vas)	6.8L

GZCM 10XSPL

26. August 2026 / groundzero

Magnifier

GZCM 10XSPL

250 mm / 10″ high power midrange speaker

450 Watts max

250 mm / 10″high efficient midrange speaker with reinforced paper cone and short CCAW voice coil

10″ high power midrange speaker
50 mm / 2″ CCA voice coil
Fiber reinforced paper cone
Ferrite motor
Resonance free steel basket
Dual cone paper dust cap
1 pair / package

Model	High power midrange speaker
Diameter	250 mm / 10″
Power handling (RMS/max.)	150 / 450 Watts
Impedance	4 Ohms
Efficiency	96 dB
Frequency Response	150 Hz – 10 kHz
Voice coil	50 mm / 2″ CCA
Mounting Ø	231 mm / 9.09″
Mounting depth	103 mm / 4.06″
Resonance frequency (Fs)	68 Hz

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GZCK 165XSPL-II

8. July 2026 / groundzero

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GZCK 165XSPL-II

165 mm / 6.5″ SPL midwoofer

250 Watts max

165 mm / 6.5″ high efficient SPL midwoofer with stiff reinforced paper cone and long stroke CCAW voice coil, incl. grill

6.5″ SPL midwoofer
38 mm / 1.5″ voice coil
Fiber reinforced paper cone
Long stroke foam surround
Resonance free steel basket
Paper dust cap
Incl. protection grill
Soldering terminal
1 pair / package

Model	SPL midwoofer
Diameter	165 mm / 6.50″
Power handling (RMS/max.)	100 / 250 Watts
Impedance	4 Ohms
Frequency Response	50 Hz – 10 kHz
Voice coil	38 mm / 1.5″ CCA
Mounting Ø	145 mm / 5.71″
Mounting depth	71,5 mm / 2.81″
Resonance frequency (Fs)	56.8 Hz

GZCK 165XSPL-II Read More »

Info Sheet (EN)

Data Sheet (EN)

GZCK 200XSPL-II

8. July 2026 / groundzero

Magnifier

GZCK 200XSPL-II

200 mm / 8″ SPL midwoofer

300 Watts max

200 mm / 8″ high efficient SPL midwoofer with stiff reinforced paper cone and long stroke CCAW voice coil, incl. grill

8″ SPL midwoofer
38 mm / 1.5″ voice coil
Fiber reinforced paper cone
Long stroke foam surround
Resonance free steel basket
Paper dust cap
Incl. protection grill
Soldering terminal
1 pair / package

Model	SPL midwoofer
Diameter	200 mm / 7.87″
Power handling (RMS/max.)	150 / 300 Watts
Impedance	4 Ohms
Efficiency	93 dB
Frequency Response	50 Hz – 6 kHz
Voice coil	38 mm / 1.5″ CCA
Mounting Ø	183 mm / 7.20″
Mounting depth	86 mm / 3.39″
Resonance frequency (Fs)	54.3 Hz

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Info Sheet (EN)

Data Sheet (EN)

GZPW 18C

23. April 2026 / groundzero

Magnifier

GZPW 18C

46 cm / 18″ high power subwoofer

6000 Watts RMS

18″ high power subwoofer with aluminum cast basket

18″ high power subwoofer
Klippel® optimized
Carbon-fiber cone
75 mm / 3″, 8-layer flat wire CCA voice coil
7-layer 10” spider
Carbon fiber dust cap

Type	High-Power Subwoofer
Diameter	46 cm / 18″
Power handling (RMS)	6000 Watts
Impedance	2x 1 Ohm
Efficiency	88 dB
Power recommendation	4000 – 6000 Watts
Voice coil	75 mm / 3″ CCA
Cone	Carbon-fiber
Max. excursion (Xmax)	80 mm / 3.15″
Mounting Ø	428 mm / 16.85″
Mounting depth	310 mm / 12.2″
Resonance frequency (Fs)	34 Hz
Damping ratio (Qts)	0.375
Equiv. air volume (Vas)	29.44 L / 1.03 cu.ft.

GZRM 80SQX

10. April 2026 / groundzero

Magnifier

GZRM 80SQX

80 mm / 3.15″ sound quality midrange speaker

80 Watts max

3.15″ sound quality midrange speaker with aluminum cone

80 mm / 3.15″ sound quality midrange speaker
25 mm / 1″ CCA voice coil
Anodized aluminum cone
Neodymium motor
Resonance free aluminum basket
Incl. protection grill
Soldering terminal
1 pair / package

Model	Sound quality midrange speaker
Diameter	80 mm / 3.15″
Power handling (RMS/max.)	50 / 80 Watts
Impedance	3 Ohms
Efficiency	89 dB
Frequency Response	140 Hz – 4 kHz
Voice coil	25 mm / 1″
Cone	anodized aluminum
Magnetmaterial	Neodymium
Mounting Ø	77 mm / 3.03″
Mounting depth	37 mm / 1.46″
Resonance frequency (Fs)	138 Hz

Owner’s manual

Info Sheet

GZRM 80SQX Read More »

GZCM 8.0N-PROC

16. March 2026 / groundzero

Magnifier

GZCM 8.0N-PROC

200 mm / 8″ high power midrange speaker with neodymium motor

500 Watts max

200 mm / 8″ high end SPL midrange speaker with neodymium motor and aluminum cast basket

8″ high power midrange speaker with neodymium motor
63 mm / 2.5″ CCA voice coil
Carbon cone
Neodymium motor
Aluminum cast basket
Push terminal
1 piece / package

Model	High end midrange speaker with neodymium magnet
Diameter	200 mm / 8″
Power handling (RMS/max.)	300 / 500 Watts
Impedance	4 Ohm
Efficiency	96 dB
Frequency response	100 Hz – 9 kHz
Voice coil	63 mm / 2.5″ CCA
Cone	carbon fiber
Mounting Ø	181 mm / 7.13″
Mounting depth	82 mm / 3.23″
Resonance frequency (Fs)	81 Hz
Damping ratio (Qts)	0.23
Equiv. air volume (Vas)	11.3 L / 0.4 cu.ft.

GZCM 8.0N-PROC Read More »

Info Sheet

GZCM 6.5N-PROC

16. March 2026 / groundzero

Magnifier

GZCM 6.5N-PROC

165 mm / 6.5″ high power midrange speaker with neodymium motor

400 Watts max

165 mm / 6.5″ high end SPL midrange speaker with neodymium motor and aluminum cast basket

6.5″ high power midrange speaker with neodymium motor
38 mm / 1.5″ CCA voice coil
Carbon cone
Neodymium motor
Aluminum cast housing
Push terminal
1 piece / package

Model	High end midrange speaker with neodymium magnet
Diameter	165 mm / 6.5″
Power handling (RMS/max.)	200 / 400 Watts
Impedance	4 Ohm
Efficiency	94 dB
Frequency response	150 Hz – 12 kHz
Voice coil	38 mm / 1.5″ CCA
Cone	carbon fiber
Mounting Ø	147 mm / 5.79″
Mounting depth	63 mm / 2.48″
Resonance frequency (Fs)	125 Hz
Damping ratio (Qts)	0.45
Equiv. air volume (Vas)	4 L / 0.14 cu.ft.