GZRK 165SQX

160 Watts max

6.5″ high power midwoofer with anodized aluminum cone

6.5″ high power midwoofer
25 mm / 1″ voice coil
Black anodized aluminum cone
Nomex spider
Resonance free steel basket
High efficient 3 ohms version
Linearized motor
Incl. protection grill
Goldplated soldering terminal
1 pair / package

Model	High power midwoofer
Diameter	165 mm / 6.50″
Power handling (RMS/max.)	110 / 160 Watts
Impedance	3 ohms
Efficiency	89 dB
Frequency Response	35 Hz – 4 kHz
Voice coil	25 mm / 1″
Cone	Black anodized aluminum
Mounting Ø	142.5 mm / 5.61″
Mounting depth	68 mm / 2.68″
Resonance frequency (Fs)	60.1 Hz

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GZRC 165.2SQX-IV

1. April 2025 / groundzero

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GZRC 165.2SQX-IV

165 mm / 6.5″ 2-way SQ component speaker system

190 Watts max

6.5″ 2-way SQ component speaker system with black anodized aluminum cone and 3-ohm impedance

2-way SQ component speaker system
Black anodized aluminum cone
Rubber surround
Nomex spider
Resonance free steel basket
High efficient 3 ohms version
GZRT 25SQ
Ferrite motor
Separated high pass and low pass filter
Incl. protection grill

Model	2-way SQ component speakers
Diameter	165 mm / 6.5″
Power handling (RMS/max.)	120 / 190 Watts
Impedance	3 ohms
Efficiency	90 dB
Frequency Response	45 Hz – 25 kHz
Tweeter	GZRT 25SQ
High performance midwoofer	GZRK 165SQX
Mounting Ø	142.5 mm / 5.61″
Mounting depth	68 mm / 2.68″
Crossover	12/12 dB/Oct
Crossover frequency	4600 Hz

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GZRC 165.2SQX

1. April 2025 / groundzero

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GZRC 165.2SQX

165 mm / 6.5″ 2-way SQ component speaker system

190 Watts max

6.5″ 2-way SQ component speaker system with black anodized aluminum cone and 3-ohm impedance

2-way SQ component speaker system
Black anodized aluminum cone
Rubber surround
Nomex spider
Resonance free steel basket
High efficient 3 ohms version
GZRT 25SQ
Ferrite motor
2-way passive crossover
Incl. protection grill

Model	2-way SQ component speakers
Diameter	165 mm / 6.5″
Power handling (RMS/max.)	120 / 190 Watts
Impedance	3 ohms
Efficiency	90 dB
Frequency Response	45 Hz – 25 kHz
Tweeter	GZRT 25SQ
High performance midwoofer	GZRK 165SQX
Mounting Ø	142.5 mm / 5.61″
Mounting depth	68 mm / 2.68″
Crossover	12/12 dB/Oct
Crossover frequency	4600 Hz

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GZC 165-30A

31. March 2025 / groundzero

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GZC 165-30A

165 mm / 6.5″ 2-way component speaker system

220 Watts max

6.5″ 2-way component loudspeaker system with powerful sound character with powerful sound character with powerful sound character

2-way component speaker system
Non-pressed paper cone
Durable rubber surround
GZ aluminum cast basket
38 mm / 1.5″” voice coil
High power capable 4 ohms version
28 mm beschichteter Seidenkalotten-Hochtöner mit eloxiertem Aluminium-Gehäuse und bedämpftem Koppelvolumen
Powerful ferrite motor
Variable 12 dB/oct crossover
GZ design hexagon style protection grill

Model	2-way component speakers
Diameter	165 mm / 6.50″
Power handling (RMS/max.)	140 / 220 Watts
Impedance	4 Ohm
Efficiency	88 dB
Frequency Response	40 Hz – 24 kHz
Tweeter	GZC T28SQ
Outer Ø	48 mm / 2.13″
Midwoofer	GZC K165
Outer Ø	165 mm / 6.5″
Mounting Ø	144 mm / 5.67″
Mounting depth	69 mm / 2.72″
Crossover	Variable 2-way
Crossover frequency	4500 Hz

Info Sheet (EN)

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GZW 12-30A

31. March 2025 / groundzero

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GZW 12-30A

30 cm / 12″ high quality SPL subwoofer

3500 Watts SPL

12″ high-power SPL subwoofer with alumiunum cast basket and reinforced paper cone

12″ high quality SPL subwoofer
Klippel® optimized
Reinforced paper cone
Long stroke U-surround
Solid aluminum cast basket
75 mm / 3″ copper voice coil
2-layer Polycot spider
Carbon dustcap

Model	High-Quality SPL subwoofer
Diameter	30 cm / 12″
Power handling (RMS/SPL)	1500 / 3500 Watts
Impedance	2x 2 Ohm
Efficiency	85 dB
Power recommendation	1000 – 3500 Watts
Voice coil	75 mm / 3″ Copper
Cone	Reinforced paper
Max. Excursion (Xmax)	45 mm / 1.77″
Mounting Ø	284 mm / 11.18″
Mounting depth	198 mm / 7.80″
Resonance frequency (Fs)	26.5 Hz
Damping ratio (Qts)	0.52
Equiv. air volume (Vas)	30,6 L / 1.08 cu.ft.

Info Sheet (EN)

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GZA 125.4-30A

31. March 2025 / groundzero

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GZA 125.4-30A

High-performance 4-channel SQ amplifier

GZA 125.4-30A Read More »

High-performance SQ amplifier

4-channel sound quality amplifier with class A/B circuit and BIAS adjustmenq

4-channel SQ amplifier
Variable BIAS setting
Filterless signal paths
High-Performance OPA 2134 operational amplifier
MUNDORF® audio capacitors
Soft delayed remote turn-on
Gold-plated connectors
Massiv heatsink in piano lacquer look
Suitable for high quality SQ setups

Model	Sound quality amplifier
Channels	4
Output Power (@ 4Ω)	4x 125 Watts RMS
Output Power (@ 2Ω)	4x 215 Watts RMS
max. Output Power bridged (CEA-2006A / 10%THD+N)	2x 480 Watts
Frequency Response	5 Hz – 70 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 / 7.70“ x 14.17″“ x 2.10“

Owner’s Manual – EN / DE

Info Sheet (EN)

GZRF 69SQX

25. March 2025 / groundzero

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GZRF 69SQX

6×9″ 3-way coaxial speaker system

200 Watts max

6×9″ 3-way coaxial speaker system with black anodized aluminum cone and 3-ohm impedance

3-way coaxial speaker system
Aluminum cone
Rubber surround
Conex® spider
Resonance free steel basket
High efficient 3 ohms version
13 mm / 0.51″ PEI tweeter
50 mm / 2″ PEI midrange speaker
Tweeter and overload protection
Incl. protection grill

Model	3-way coaxial speakers
Diameter	6×9″
Power handling (RMS/max.)	130 / 200 Watts
Impedance	3 ohms
Efficiency	92 dB
Frequency Response	40 Hz – 25 kHz
Tweeter	13 mm / 0.51″ PEI
Midrange speaker	50 mm / 2″ PEI
Mounting Ø	152 x 214 mm / 5.98 x 8.43″
Mounting depth	82 mm / 3.23″

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GZ SUB-AMP 300

24. February 2025 / groundzero

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GZ SUB-AMP 300

Compact amplifier module

Active subwoofer-module for many GROUND ZERO subwoofer boxes

1-channel 2-ohm stable amplifier module with class D circuit, integrated active crossover and bass boost

Class D technology
Variable active crossover and bass boost

Channels	1
Output Power (@ 4Ω)	170 Watts RMS
Output Power (@ 2Ω)	280 Watts RMS
Output Power (@ 2Ω)	330 Watts RMS
Frequency Response	20 Hz – 200 Hz
HPF / LPF / BPF	○ / ● / ○
Bass Boost / Phase switch	● / ○
High level input / Auto-on	● / ●
Remote	●
BIAS Setting	○
Linkmode	○
Dimensions (W x L x H)	85 x 126 x 85 mm / 3.35 x 4.96 x 3.35″

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GZCM 8.0XSPL

6. February 2025 / groundzero

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GZCM 8.0XSPL

200 mm / 8″ high power midrange speaker

420 Watts max

200 mm / 8″ flat high efficient midrange speaker with reinforced, water repellant paper cone

8″ high power midrange speaker
30 mm / 1.2″ CCA voice coil
Fiber reinforced paper cone
Ferrite motor
Resonance free steel basket
Paper dust cap
UV resistant and water repellant
1 pair / package

Model	High power midrange speaker
Diameter	200 mm / 8″
Power handling (RMS/max.)	170 / 420 Watts
Impedance	4 Ohms
Efficiency	95 dB
Frequency Response	120 Hz – 11 kHz
Voice coil	30 mm / 1.2″ CCA
Mounting Ø	182 mm / 7.17″
Mounting depth	84 mm / 3.31″
Resonance frequency (Fs)	81 Hz

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GZCM 6.5XSPL

6. February 2025 / groundzero

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GZCM 6.5XSPL

165 mm / 6.5″ high power midrange speaker

320 Watts max

165 mm / 6.5″ high efficient midrange speaker with reinforced, water repellant paper cone

6.5″ high power midrange speaker
30 mm / 1.2″ CCA voice coil
Fiber reinforced paper cone
Ferrite motor
Resonance free steel basket
Paper dust cap
UV resistant and water repellant
1 pair / package

Model	High power midrange speaker
Diameter	165 mm / 6.50″
Power handling (RMS/max.)	120 / 320 Watts
Impedance	4 Ohms
Efficiency	95 dB
Frequency Response	150 Hz – 11 kHz
Voice coil	30 mm / 1.2″ CCA
Mounting Ø	143 mm / 5.63″
Mounting depth	74 mm / 2.91″
Resonance frequency (Fs)	86 Hz

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GZCF 6.5XSPL-NEO

4. February 2025 / groundzero

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GZCF 6.5XSPL-NEO

165 mm / 6.5″ 2-way coaxial speaker system with neodymium motor

250 Watts max

165 mm / 6.5″ 2-way coaxial speaker system with water repellant paper cone and 28 mm / 1.1″ PEI tweeter

2-way coaxial speaker system
Fiber reinforced paper cone
UV resistant and water repellant
Neodymium motor
Resonance free steel basket
compact motor construction
28 mm / 1.1″ PEI tweeter
High excursion foamed W surround
6 dB/oct high pass filter; 6 dB/oct low pass filter
Incl. Hexagon style protection grill

Type	2-way coaxial speakers
Diameter	165 mm / 6.5″
Power handling (RMS/max.)	100 / 250 Watts
Impedance	4 Ohms
Efficiency	98 dB
Frequency response	70 Hz – 20 kHz
Mounting Ø	145 mm / 5.71″
Mounting depth	65 mm / 2.56″
Crossover frequency	7500 Hz

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GZCC 2.0X-TP

12. December 2024 / groundzero

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GZCC 2.0X-TP

2.0 m high quality RCA cable with metal connectors

Zusätzliche Informationen

6.56 ft length

2.0 m high quailty RCA cable with gold plated metal connectors, triple shielded and twisted wires, snake skin protection

High quailty RCA cable
Triple shielded
Gold plated slotted metal connectors
Snakeskin jacket
2.0 m / 6.56 ft length

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GZCA 300.Q1-24V

26. November 2024 / groundzero

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GZCA 300.Q1-24V

4-channel competition SPL amplifier

Beschreibung

Compact high-power amplifier

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

24 v operating voltage
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
Particularly qualified for SPL and SQL applications

Type	Competition SPL amplifier
Channels	4
Output Power (@ 4Ω)	105 Watts RMS
Output Power (@ 2Ω)	195 Watts RMS
Output Power (@ 1Ω)	345 Watts RMS
max. Output Power (CEA-2006A / 10%THD+N)	1650 Watts
Ouput power (@ 2Ω) bridged	2x 690 Watts RMS
Frequency Response	5 Hz – 22 kHz
HPF / LPF / BPF	● / ● / ○
Bass Boost / Phase Shift	○ / ○
High-Level Input / Auto-on	○ / ○
Remote Control	optionally
BIAS Setting	○
Linkmode	○
Dimensions (w x h x l)	220 x 150 x 58 mm / 8.66 x 5.91 x 2.28″

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GZCA 3000.M1-24V

26. November 2024 / groundzero

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GZCA 3000.M1-24V

1-channel competition SPL amplifier

Additional Information

High-power class D amplifier

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

SPL high power amplifier
24 v operating voltage
Class D technology
Variable active crossover and bass boost
Stabilized high voltage power supply
Large terminals
Solid heatsink with Ground Zero lettering
Particularly qualified for SPL and SQL applications

Type	Competition SPL amplifier
Channels	1
Output Power (@ 4Ω)	1000 Watts RMS
Output Power (@ 2Ω)	1825 Watts RMS
Output Power (@ 1Ω)	3180 Watts RMS
Output Power (@ 1Ω)	4500 Watts max
Frequency Response	10 Hz – 200 kHz
HPF / LPF / BPF	● / ● / ●
Bass Boost / Phase Shift	● / ○
High-Level Input / Auto-on	○ / ○
Remote Control	●
BIAS Setting	○
Linkmode	○
Dimensions (w x l x h)	255 x 150 x 58 mm / 10.04 x 5.91 x 2.28″

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GZCF 69XSPL-NEO

26. November 2024 / groundzero

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GZCF 69XSPL-NEO

6×9″ 2-way coaxial speaker system with neodymium motor

300 Watts max

6×9″ 2-way coaxial speaker system with water repellant paper cone and 28 mm / 1.1″ PEI tweeter

2-way coaxial speaker system
Fiber reinforced paper cone
UV resistant and water repellant
Neodymium motor
Resonance free steel basket
compact motor construction
28 mm / 1.1″ PEI tweeter
High excursion foamed W surround
6 dB/oct high pass filter
Incl. Hexagon style protection grill

Type	2-way coaxial speakers
Diameter	6×9″
Power handling (RMS/max.)	150 / 300 Watts
Impedance	4 Ohms
Efficiency	98 dB
Frequency response	50 Hz – 20 kHz
Mounting Ø	152 x 214 mm / 5.98″ x 8.43″
Mounting depth	79 mm / 3.11″
Crossover frequency	7000 Hz

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GZCF 8.0XSPL-NEO

26. November 2024 / groundzero

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GZCF 8.0XSPL-NEO

200 mm / 8″ 2-way coaxial speaker system with neodymium motor

300 Watts max

200 mm / 8″ 2-way coaxial speaker system with water repellant paper cone and 28 mm / 1.1″ PEI tweeter

2-way coaxial speaker system
Fiber reinforced paper cone
UV resistant and water repellant
Neodymium motor
Resonance free steel basket
compact motor construction
28 mm / 1.1″ PEI tweeter
High excursion foamed W surround
6 dB/oct high pass filter
Incl. Hexagon style protection grill

Type	2-way coaxial speakers
Diameter	200 mm / 8″
Power handling (RMS/max.)	150 / 300 Watts
Impedance	4 Ohms
Efficiency	98 dB
Frequency response	40 Hz – 20 kHz
Mounting Ø	183 mm / 7.20″
Mounting depth	82 mm / 3.23″
Crossover frequency	7000 Hz

GZCF 8.0XSPL-NEO Read More »

GZNW 15X-D2

7. August 2024 / groundzero

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GZNW 15X-D2

38 cm / 15″ long excursion subwoofer

2500 Watts SPL

15″ long excursion subwoofer with aluminum cone

15″ long excursion subwoofer
Klippel® optimized
Aluminum Cone & dust cap
High-roll surround
Solid, blue aluminum cast basket
75 mm / 3″ copper round wire voice coil
4-layer polycotton spider

Model	Long excursion Subwoofer
Diameter	38 cm / 15″
Power handling (RMS/SPL)	2500 / 4000 Watts
Impedance	2x 2 Ohms
Efficiency	85 dB
Power recommendation	2000 – 3000 Watts
Voice coil	75 mm / 3″ copper
Cone	Aluminum
Max. Excursion (Xmax)	62 mm / 2.44″
Mounting Ø	360 mm / 14.1″
Mounting depth	250 mm / 9.84″
Resonance frequency (Fs)	35.2 Hz
Damping ratio (Qts)	0.54
Equiv. air volume (Vas)	28 L / 0.99 cu.ft.

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GZCF 6.5XSPL

6. August 2024 / groundzero

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GZCF 6.5XSPL

165 mm / 6.5″ 2-way coaxial speaker system

250 Watts max

165 mm / 6.5″ 2-way coaxial speaker system with paper cone and 28 mm / 1.1″ PEI tweeter

2-way coaxial speaker system
Pressed paper cone
High-excursion foamed W-surround
UV resistant and water repellant
1,5” Copper-clad aluminum flatwire voice coil
Resonance free steel basket
28 mm / 1.1″ PEI tweeter
Ferrite motor
12 dB/oct high pass filter
Incl. Hexagon style protection grill

Model	2-way coaxial speakers
Diameter	165 mm / 6.50″
Power handling (RMS/max.)	100 / 250 Watts
Impedance	4 Ohms
Efficiency	94 dB
Frequency Response	50 Hz – 20 kHz
Mounting Ø	145 mm / 5.71″
Mounting depth	70 mm / 2.76″

GZCF 6.5XSPL Read More »

GZRF 6.5SQX

22. July 2024 / groundzero

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GZRF 6.5SQX

165 mm / 6.5″ 2-way coaxial speaker system

140 Watts max

6.5″ 2-way coaxial speaker system with black, circular-brushed aluminum cone and 3-ohm impedance

2-way coaxial speaker system
Aluminum cone
Rubber surround
Conex® spider
Resonance free steel basket
High efficient 3 ohms version
25 mm / 1″ silk dome tweeter
Ferrite motor
Tweeter and overload protection
Incl. protection grill

Model	2-way coaxial speakers
Diameter	165 mm / 6.50″
Power handling (RMS/max.)	100 / 140 Watts
Impedance	3 ohms
Efficiency	91 dB
Frequency Response	50 Hz – 24 kHz
Tweeter	25 mm / 1″ silk dome
Mounting Ø	142.5 mm / 5.61″
Mounting depth	68 mm / 2.68″
Crossover	6 dB/oct – high pass filter

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GZRF 5.2SQX

22. July 2024 / groundzero

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GZRF 5.2SQX

130 mm / 5″ 2-way coaxial speaker system

110 Watts max

6.5″ 2-way coaxial speaker system with black, circular-brushed aluminum cone and 3-ohm impedance

2-way coaxial speaker system
Aluminum cone
Rubber surround
Conex® spider
Resonance free steel basket
High efficient 3 ohms version
25 mm / 1″ silk dome tweeter
Ferrite motor
Tweeter and overload protection
Incl. protection grill

Model	2-way coaxial speakers
Diameter	130 mm / 5.12″
Power handling (RMS/max.)	80 / 120 Watts
Impedance	3 ohms
Efficiency	90 dB
Frequency Response	60 Hz – 24 kHz
Tweeter	25 mm /1 ” silk dome
Mounting Ø	117.5 mm / 4.63″
Mounting depth	59 mm / 2.32″
Crossover	6 dB/oct – high pass filter