GZIA 1000.1

Powerful class D amplifier

1-channel subwoofer amplifier with class D circuit, integrated active crossover and regulated power supply

Mono amplifier
1 ohm stable
Class D technology
Variable active crossover and bass boost
High-level input with auto-on function & dummy load
GZ-PowerBalance power supply regulation
Large terminals
Black anodized heatsink with Ground Zero lettering
Bass remote control included
Triple protection circuit

Model	High quality class D amplifier
Channels	1
Output Power (@ 4Ω)	320 Watts RMS
Output Power (@ 2Ω)	670 Watts RMS
Output Power (@ 1Ω)	1250 Watts RMS
max. Output Power (CEA-2006A / 10%THD+N)	1500 Watts
Frequency Response	10 – 250 Hz
HPF / LPF / BPF	● / ● / ●
Bass Boost / Phase switch	● / ○
High level input / Auto-on	● / ●
Remote	●
BIAS Setting	○
Linkmode	○
Dimensions (W x L x H)	168 x 49 x 207 mm / 6.61″ x 1.93″ x 8.15″

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GZIA 500.1

6. May 2025 / groundzero

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GZIA 500.1

1-channel high quality class D amplifier

Powerful class D amplifier

1-channel subwoofer amplifier with class D circuit and integrated active crossover

Mono amplifier
1 ohm stable
Class D technology
Variable active crossover and bass boost
High-level input with auto-on function & dummy load
Stable power supply
Large terminals
Black anodized heatsink with Ground Zero lettering
Bass remote control included
Triple protection circuit

Model	High quality class D amplifier
Channels	1
Output Power (@ 4Ω)	230 Watts RMS
Output Power (@ 2Ω)	400 Watts RMS
Output Power (@ 1Ω)	580 Watts RMS
max. Output Power (CEA-2006A / 10%THD+N)	700 Watts
Frequency Response	15 – 250 Hz
HPF / LPF / BPF	● / ● / ●
Bass Boost / Phase switch	● / ○
High level input / Auto-on	● / ●
Remote	●
BIAS Setting	○
Linkmode	○
Dimensions (W x L x H)	168 x 49 x 212 mm / 6.61″ x 1.93″ x 8.35″

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GZ GRILL 8.0

5. May 2025 / groundzero

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GZ GRILL 8.0

20 cm / 8″ Protection grill

Loudspeaker protection grill

20 cm / 8″ Protection grill

Two-part protective grille, consisting of grille and mounting ring
Solid NRG* loudspeaker protection grille
Including GZ logo plate
Fitting for GZCM 8.0XSPL
max. speaker outer diameter: 210 mm / 8.27″
max. speaker mounting diameter: 182.5 mm / 7.19″
*NRG = Non Resonant Grill

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GZ GRILL 6.5

5. May 2025 / groundzero

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GZ GRILL 6.5

16,5 cm / 6.5″ Protection grill

Loudspeaker protection grill

16,5 cm / 6.5″ Protection grill

Two-part protective grille, consisting of grille and mounting ring
Solid NRG* loudspeaker protection grille
Including GZ logo plate
Fitting for GZCM 6.5XSPL, GZCF 6.5XSPL-NEO, GZCF 6.5XSPL
max. speaker outer diameter: 168 mm / 6.61″
max. speaker mounting diameter: 146 mm / 5.75″
*NRG = Non Resonant Grill

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GZ GRILL 12U

5. May 2025 / groundzero

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GZ GRILL 12U

30 cm / 12″ subwoofer grill

Subwoofer protection grill

30 cm / 12″ Protection grill

Two-part protective grille, consisting of grille and mounting ring
Solid NRG* loudspeaker protection grille
Fitting for many Ground Zero 12″ subwoofers (see the tab “Additional Information”)
max. subwoofer’s outer diameter: 315 mm / 12.40“
*NRG = Non Resonant Grill

Compatible with

GZHW 12SPL-D2 FLAT

GZHW 30XSPL

GZIW 12XSPL-D2

GZIW 300

GZNW 30SPL-D1

GZRW 12XSPL

GZRW 30-D2

GZUW 12SQ-D2

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GZ GRILL 10U

5. May 2025 / groundzero

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GZ GRILL 10U

25 cm / 10″ subwoofer grill

Subwoofer protection grill

25 cm / 10″ Protection grill

Two-part protective grille, consisting of grille and mounting ring
Solid NRG* loudspeaker protection grille
Fitting for many Ground Zero 10″ subwoofers (see the tab “Additional Information”)
max. subwoofer’s outer diameter: 274 mm / 10.79“
*NRG = Non Resonant Grill

Compatible with

GZHW 10SPL-D2 FLAT

GZHW 25XSPL-D1

GZIW 10XSPL-D2

GZIW 250

GZRW 10XSPL

GZRW 25-D2

GZRW 250-D2 FLAT

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GZ GRILL 8U

5. May 2025 / groundzero

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GZ GRILL 8U

20 cm / 8″ subwoofer grill

Subwoofer protection grill

20 cm / 8″ Protection grill

Two-part protective grille, consisting of grille and mounting ring
Solid NRG* loudspeaker protection grille
Fitting for many Ground Zero 8″ subwoofers (see the tab “Additional Information”)
max. subwoofer’s outer diameter: 215 mm / 8.46“
*NRG = Non Resonant Grill

Compatible with

GZHW 8SPL-D2 FLAT

GZHW 20XSPL-D1

GZIW 200

GZRW 8XSPL

GZUW 8SQ-D2

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GZCA 8000.M1

5. May 2025 / groundzero

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GZCA 8000.M1

1-channel competition SPL amplifier

High-power mono 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)	2400 Watts RMS
Output Power (@ 2Ω)	4500 Watts RMS
Output Power (@ 1Ω)	8100 Watts RMS
Output Power (@ 1Ω)	9800 Watts max
Frequency Response	10 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)	200 x 308/342 x 57 mm / 7.87″ x 12.13″/13.46″ x 2.24″

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GZNW 38NEO-XSPL

5. May 2025 / groundzero

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GZNW 38NEO-XSPL

38 cm / 15″ high performance SPL subwoofer with neodymium motor

25000 Watts SPL*

15″ high performance SPL subwoofer with airflow optimized aluminum cast basket

15″ high performance SPL subwoofer
Klippel® optimized
Carbon-fiber cone
Multi-piece neodymium motor
Airflow optimized aluminum cast basket
75 mm / 3″, 8-layer flat wire CCA voice coil
7-layer 12” spider
Carbon-fiber dust cap
Fixed connection cables
*for 3 sec.

Type	Neodymium SPL Subwoofer
Diameter	38 cm / 15″
Power handling (RMS)	6000 / 25000* Watts
Impedance	2x 1 Ohm
Efficiency	89 dB
Power recommendation	3000 – 6000 Watts
Voice coil	75 mm / 3″ CCA
Cone	Carbon-fiber
Max. excursion (Xmax)	80 mm / 3.15″
Mounting Ø	360 mm / 14.17″
Mounting depth	315 mm / 12.4″
Resonance frequency (Fs)	31 Hz
Damping ratio (Qts)	0.16
Equiv. air volume (Vas)	24.5 L / 0.91 cu.ft.

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GZNW 38XMAX-II

5. May 2025 / groundzero

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GZNW 38XMAX-II

38 cm / 15″ high performance long excursion subwoofer

4000 Watts RMS

15″ high performance long excursion subwoofer with airflow optimized aluminum cast basket and Xmax surround

15″ long excursion subwoofer
Klippel® optimized
Aluminum Cone & dust cap
3-layer long stroke surround
Airflow optimized aluminum cast basket
75 mm / 3″ aluminum round wire voice coil
7-layer 12” spider
Aluminum dust cap
Massive push terminals

Type	Long excursion Subwoofer
Diameter	38 cm / 15″
Power handling (RMS)	4000 Watts
Impedance	2x 1 Ohm
Efficiency	84 dB
Power recommendation	2000 – 6000 Watts
Voice coil	75 mm / 3″ aluminum
Cone	Aluminum
Max. excursion (Xmax)	62 mm / 2.36″
Mounting Ø	360 mm / 14.17″
Mounting depth	300 mm / 11.81″
Resonance frequency (Fs)	31 Hz
Damping ratio (Qts)	0.51
Equiv. air volume (Vas)	26.2 L / 0.93 cu.ft.

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GZNW 30XMAX-II

5. May 2025 / groundzero

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GZNW 30XMAX-II

30 cm / 12″ long stroke subwoofer

3000 Watts RMS

12″ High-Performance long stroke subwoofer with aluminum cast basket and XMAX surround

High-performance 12” subwoofer
Klippel® optimized
Aluminum cone
Long stroke compound surround
Solid aluminum cast basket
75 mm / 3″ CCA round wire voice coil
4-layer Nomex spider
Aluminum dust cap

Type	High-Performance Low-Bass-Subwoofer
Diameter	30 cm / 12″
Power handling (RMS)	3000 Watts
Impedance	2x 1 Ohm
Efficiency	83 dB
Power recommendation	2000 – 4000 Watts
Voice coil	75 mm / 3″ CCA
Cone	Aluminum
Max. excursion (Xmax)	60 mm / 2.36″
Mounting Ø	282 mm / 11.10″
Mounting depth	250 mm / 9.84″
Resonance frequency (Fs)	35.6 Hz
Damping ratio (Qts)	0.61
Equiv. air volume (Vas)	13.6 L / 0.48 cu.ft.

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GZPW 15XMAX-II

5. May 2025 / groundzero

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GZPW 15XMAX-II

38 cm High-Power Langhub-Subwoofer

Additional Information

6000 Watts RMS

15″ high power long excursion subwoofer with airflow optimized aluminum cast basket and Xmax surround

15″ high long excursion subwoofer
Klippel® optimized
Aluminum cone
3-layer long stroke surround
Airflow optimized aluminum cast basket
4” 4-layer flatwire CCA voice coil
7-layer 12” spider
Aluminum dust cap
Massive push terminals

Type	High power long excursion subwoofer
Diameter	38 cm / 15″
Power handling (RMS)	6000 Watts
Impedance	2x 1 Ohm
Efficiency	85 dB
Power recommendation	4000 – 8000 Watts
Voice coil	100 mm / 4″ CCA
Cone	Aluminum
Max. excursion (Xmax)	80 mm / 3.15″
Mounting Ø	360 mm / 14.17″
Mounting depth	310 mm / 12.20″
Resonance frequency (Fs)	30 Hz
Damping ratio (Qts)	0.42
Equiv. air volume (Vas)	27 L / 0.95 cu.ft.

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GZPW 15NEO-XSPL

5. May 2025 / groundzero

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GZPW 15NEO-XSPL

38 cm / 15″ high power SPL subwoofer with neodymium motor

25000* Watts SPL

15″ high power SPL subwoofer with airflow optimized aluminum cast basket

15″ high power SPL subwoofer
Klippel® optimized
Carbon-fiber cone
Multi-piece neodymium motor
Airflow optimized aluminum cast basket
100 mm / 4″, 8-layer flat wire CCA voice coil
7-layer 12” spider
Carbon fiber dust cap
Fixed connection cables
*for 3 sec.

Type	Neodymium SPL Subwoofer
Diameter	38 cm / 15″
Power handling (RMS/SPL)	6500 / 25000* Watts
Impedance	2x 1 Ohm
Efficiency	90 dB
Power recommendation	4500 – 6500 Watts
Voice coil	100 mm / 4″ aluminium
Cone	Carbon
Max. excursion (Xmax)	60 mm / 2.36″
Mounting Ø	360 mm / 14.17″
Mounting depth	325 mm / 12.8″
Resonance frequency (Fs)	31 Hz
Dämpfungsgrad (Qts)	0.15
Damping ratio (Qts)	26 L / 0.92 cu.ft.

GZPW 15NEO-XSPL Read More »

GZIC 165.2HE

5. May 2025 / groundzero

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GZIC 165.2HE

165 mm / 6.5″ 2-way component speaker system

150 Watts max

6.5″ 2-way component speaker system with lightweight HQPP cone and phase plug

2-way component speaker system
HQPP cone with 3D structure
High efficient flat wire voicecoil
Euro-DIN basket
Heat resistant phase plug for wide angle behaviour
Durable rubber surround
19 mm / 0.75″ Mylar tweeter
Ferrite motor
12 dB/oct high pass filter
Incl. Hexagon style protection grill

Model	2-way component speakers
Diameter	165 mm / 6.50″
Power handling (RMS/max.)	100 / 150 Watts
Impedance	3 Ohms
Efficiency	91 dB
Frequency Response	75 Hz – 20 kHz
Tweeter	19 mm / 0.75 ” mylar dome
Membran	HQPP cone with 3D-structure
Mounting Ø	142.5 mm / 5.61″
Mounting depth	65 mm / 2.56″
Crossover	12 dB/oct – high pass filter

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GZRK 165SQX

4. April 2025 / groundzero

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GZRK 165SQX

165 mm / 6.5″ high power midwoofer

160 Watts max

6.5″ high power midwoofer with black aluminum cone

6.5″ high power midwoofer
25 mm / 1″ voice coil
Massive aluminum phaseplug
Conex 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.)	120 / 160 Watts
Impedance	3 ohms
Efficiency	90 dB
Frequency Response	45 Hz – 15 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
Conex 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	12/18 dB/Oct
Crossover frequency	4600 Hz

GZRC 165.2SQX Read More »

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)

GZW 12-30A Read More »

GZA 125.4-30A

31. March 2025 / groundzero

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GZA 125.4-30A

High-performance 4-channel SQ amplifier