Ground Zero

The Rise of the GROUND ZERO Company

GROUND ZERO has been founded back in 1995 by Karl Felix Lautner distributing car audio products "Made in USA" and introduced the revolutionary subwoofers of GZ Engineering USA to the European market in 1997. The following years, the German company took over the European trademark rights of "GROUND ZERO" and started developing market specific products. Finally, 2003 the GROUND ZERO GmbH took over all global trademarks from the discontinued US company and expanded the distribution to customers worldwide. Today, more than 400 sophisticated audio products developed and designed at the GROUND ZERO in-house engineering department are available in more than 65 countries globally.

Ensuring Superior Quality of GROUND ZERO Products

The GROUND ZERO product range includes speakers, subwoofers, amplifiers and further digital audio equipment for enthusiastic customers. Satisfying high demands and quality, Ground Zero carefully monitors every step of the production starting at the development using top-notch tools and highly accurate measurement equipment such as the laser controlled KLIPPEL® system to optimize every detail. Precise amplifier measurement equipment by Audio Precision® results in power ratings corresponding to the acknowledged CEA 2006-A standard. Without exceptions, every single product is evaluated by extensive testing and quality control prior to its final production release and market launch.


 

Tweeter

Ground Zero GZNT 22SQ  

order no. gz-gznt-22sq

EUR 199,00 excl. VAT: € 171.55 / $ 200.72

22 mm tweeter with high quality cone. The magnet system is based on Neodymium technology.

  • power handling (continuous/programme) = 60 W
  • resonance frequency fs = 825 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 89,5 dB (2,83V; 1m)
  • voice coil diameter = 22 mm
  • overall diameter d = 50 mm
  • mounting depth (not countersunk) t = 23,1 mm
PDF data sheet

Ground Zero GZCT-25SQL  

order no. gz-gzct-25sql

EUR 49,00 excl. VAT: € 42.24 / $ 49.42

25 mm tweeter with high quality cone. The magnet system is based on Neodymium technology.

  • power handling (continuous/programme) = 100 W
  • impedance R = 4 Ohm
  • sound pressure level SPL = 93 dB (2,83V; 1m)
  • voice coil diameter = 25 mm
  • mounting diameter d = 50 mm
  • overall diameter d = 75 mm
  • mounting depth (not countersunk) t = 36 mm
PDF data sheet

Ground Zero GZCT-5000SPL-B  

order no. gz-gzct-5000spl-b

EUR 109,00 excl. VAT: € 93.97 / $ 109.94

44 mm tweeter with high quality cone.

  • power handling (continuous/programme) = 70 W
  • impedance R = 4 Ohm
  • sound pressure level SPL = 108 dB (2,83V; 1m)
  • voice coil diameter = 44 mm
  • mounting diameter d = 165x130 mm
  • overall diameter d = 200x150 mm
  • mounting depth (not countersunk) t = 142 mm
PDF data sheet


 

Mids

Ground Zero GZPM 80SQX-II
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recommended cabinet 1:
closed cabinet with 0,41 L volume
from 184/116 Hz (-3dB/-8dB)

recommended cabinet 2:
1,7 L volume bass reflex cabinet
with 2cm-Rohr reflex tube, 5 cm long.
from 86/72 Hz (-3dB/-8dB).

Ground Zero GZPM 80SQX-II  

order no. gz-gzpm-80sqx-2

EUR 379,00 excl. VAT: € 326.72 / $ 382.27

8 cm midrange driver with high quality cone. The basket is made of die-cast. The magnet system is based on Neodymium technology.

  • power handling (continuous/programme) = 70 W
  • resonance frequency fs = 109,4 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 87 dB (2,83V; 1m)
  • DC resistance Re = 3,3 Ohm
  • force factor BL = 4 N/A
  • effective piston radiating area Sd = 34 cm2
  • effective mechanical mass incl. air load mms = 3,7 g
  • equivalent volume of compliance Vas = 0,9 l
  • total Q factor Qts = 0,46 (Qms=3,3, Qes=0,54)
  • voice coil diameter = 25 mm
  • mounting diameter d = 77 mm
  • overall diameter d = 94 mm
  • mounting depth (not countersunk) t = 34 mm
PDF data sheet

Ground Zero GZRM 80SQ
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recommended cabinet 1:
closed cabinet with 0,41 L volume
from 229/145 Hz (-3dB/-8dB)

recommended cabinet 2:
1,5 L volume bass reflex cabinet
with HP35 reflex tube, 10 cm long.
from 114/92 Hz (-3dB/-8dB).

Ground Zero GZRM 80SQ  

order no. gz-gzrm-80sq

EUR 179,00 excl. VAT: € 154.31 / $ 180.54

8 cm midrange driver with high quality cone. The basket is made of die-cast. The magnet system is based on Neodymium technology.

  • power handling (continuous/programme) = 50 W
  • resonance frequency fs = 114 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 89 dB (2,83V; 1m)
  • force factor BL = 3,58 N/A
  • effective piston radiating area Sd = 34 cm2
  • effective mechanical mass incl. air load mms = 2,65 g
  • equivalent volume of compliance Vas = 1,5 l
  • total Q factor Qts = 0,38 (Qms=2,86, Qes=0,44)
  • voice coil diameter = 25 mm
  • mounting diameter d = 77 mm
  • overall diameter d = 94 mm
  • mounting depth (not countersunk) t = 34 mm
PDF data sheet


 

Coaxial speaker

Ground Zero GZCF 165COAX  

order no. gz-gzcf-165coax

EUR 169,00 excl. VAT: € 145.69 / $ 170.46

16 cm coax driver with high quality cone. The basket is made of die-cast.

  • power handling (continuous/programme) = 125 W
  • resonance frequency fs = 171,7 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 97 dB (2,83V; 1m)
  • DC resistance Re = 3,4 Ohm
  • force factor BL = 5,6 N/A
  • effective mechanical mass incl. air load mms = 6,2 g
  • equivalent volume of compliance Vas = 4,6 l
  • total Q factor Qts = 0,68 (Qms=12,93, Qes=0,72)
  • voice coil diameter = 40 mm
  • mounting diameter d = 147,5 mm
  • overall diameter d = 169 mm
  • mounting depth (not countersunk) t = 79 mm
PDF data sheet


 

Woofer

Ground Zero GZIW 165X-II
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recommended cabinet 1:
closed cabinet with 3,7 L volume
from 71/45 Hz (-3dB/-8dB)

recommended cabinet 2:
14,9 L volume bass reflex cabinet
with HP50 reflex tube, 23 cm long.
from 34/28 Hz (-3dB/-8dB).

Ground Zero GZIW 165X-II  

order no. gz-gziw-165x-2

EUR 59,00 excl. VAT: € 50.86 / $ 59.51

16 cm bass driver with high quality cone.

  • power handling (continuous/programme) = 150 W
  • resonance frequency fs = 41,5 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 85,5 dB (2,83V; 1m)
  • DC resistance Re = 3,68 Ohm
  • force factor BL = 9 N/A
  • effective piston radiating area Sd = 165 cm2
  • effective mechanical mass incl. air load mms = 40 g
  • equivalent volume of compliance Vas = 8,6 l
  • total Q factor Qts = 0,45 (Qms=9,92, Qes=0,47)
  • voice coil diameter = 38 mm
  • mounting diameter d = 147 mm
  • overall diameter d = 168 mm
  • mounting depth (not countersunk) t = 114 mm
PDF data sheet

Ground Zero GZHW 16SPL
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recommended cabinet 1:
closed cabinet with 1,3 L volume
from 86/54 Hz (-3dB/-8dB)

recommended cabinet 2:
5,2 L volume bass reflex cabinet
with HP50 reflex tube, 50 cm long.
from 40/34 Hz (-3dB/-8dB).

Ground Zero GZHW 16SPL  

order no. gz-gzhw-16spl

EUR 179,00 excl. VAT: € 154.31 / $ 180.54

16 cm bass driver with high quality cone. The basket is made of die-cast. The driver is made with a double voice coil and the given impedance values are for connection in series.

  • power handling (continuous/programme) = 500 W
  • resonance frequency fs = 51 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 81 dB (2,83V; 1m)
  • DC resistance Re = 3,9 Ohm
  • force factor BL = 15,8 N/A
  • effective piston radiating area Sd = 172 cm2
  • effective mechanical mass incl. air load mms = 96,6 g
  • equivalent volume of compliance Vas = 2,8 l
  • total Q factor Qts = 0,46 (Qms=7,87, Qes=0,49)
  • voice coil diameter = 50 mm
  • mounting diameter d = 153 mm
  • overall diameter d = 177 mm
  • mounting depth (not countersunk) t = 110 mm
PDF data sheet

Ground Zero GZUW 10SQX  

order no. gz-gzuw-10sqx

EUR 199,00 excl. VAT: € 171.55 / $ 200.72

25 cm bass driver with high quality cone. The basket is made of die-cast. The driver is made with a double voice coil and the given impedance values are for connection in series.

  • power handling (continuous/programme) = 450 W
  • resonance frequency fs = 46,7 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 85,2 dB (2,83V; 1m)
  • DC resistance Re = 4,4 Ohm
  • force factor BL = 15,5 N/A
  • effective piston radiating area Sd = 437 cm2
  • effective mechanical mass incl. air load mms = 124,8 g
  • equivalent volume of compliance Vas = 14,2 l
  • total Q factor Qts = 0,63 (Qms=9,64, Qes=0,67)
  • voice coil diameter = 50 mm
  • mounting diameter d = 236 mm
  • overall diameter d = 262 mm
  • mounting depth (not countersunk) t = 148 mm
PDF data sheet

Ground Zero GZPW REFERENCE 250
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recommended cabinet 1:
closed cabinet with 23 L volume
from 46/29 Hz (-3dB/-8dB)

recommended cabinet 2:
91 L volume bass reflex cabinet
with HP100 reflex tube, 38 cm long.
from 21/18 Hz (-3dB/-8dB).

Ground Zero GZPW REFERENCE 250  

order no. gz-gzpw-reference-250

EUR 1499,00 excl. VAT: € 1292.24 / $ 1511.92

26 cm bass driver with high quality cone. The basket is made of die-cast.

  • power handling (continuous/programme) = 500 W
  • resonance frequency fs = 31 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 87 dB (2,83V; 1m)
  • DC resistance Re = 3,8 Ohm
  • force factor BL = 14,4 N/A
  • effective piston radiating area Sd = 430 cm2
  • effective mechanical mass incl. air load mms = 119,1 g
  • equivalent volume of compliance Vas = 31,47 l
  • total Q factor Qts = 0,53 (Qms=8,63, Qes=0,56)
  • voice coil diameter = 50 mm
  • maximum peak linear excursion vibration xlin = +/- 15 mm
  • mounting diameter d = 235 mm
  • overall diameter d = 275 mm
  • mounting depth (not countersunk) t = 128 mm
PDF data sheet

Ground Zero GZTW 12F
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recommended cabinet 1:
closed cabinet with 38 L volume
from 52/33 Hz (-3dB/-8dB)

recommended cabinet 2:
154 L volume bass reflex cabinet
with 2x HP100 reflex tube, 30 cm long.
from 23/20 Hz (-3dB/-8dB).

Ground Zero GZTW 12F  

order no. gz-gztw-12f

EUR 149,00 excl. VAT: € 128.45 / $ 150.28

30 cm bass driver with high quality cone. The driver is made with a double voice coil and the given impedance values are for connection in series.

  • power handling (continuous/programme) = 350 W
  • resonance frequency fs = 35,1 Hz
  • impedance R = 4 Ohm
  • sound pressure level SPL = 89 dB (2,83V; 1m)
  • DC resistance Re = 4 Ohm
  • force factor BL = 15,5 N/A
  • voice coil inductance L = 1,993 mH
  • effective piston radiating area Sd = 572,5 cm2
  • effective mechanical mass incl. air load mms = 159 g
  • equivalent volume of compliance Vas = 53,15 l
  • total Q factor Qts = 0,53 (Qms=7,489, Qes=0,566)
  • voice coil diameter = 50 mm
  • maximum peak linear excursion vibration xlin = +/- 14 mm
  • mounting diameter d = 284 mm
  • overall diameter d = 313 mm
  • mounting depth (not countersunk) t = 97,5 mm
PDF data sheet

Ground Zero GZPW 15NEO-SPL
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recommended cabinet 1:
closed cabinet with 1,6 L volume
from 154/97 Hz (-3dB/-8dB)

recommended cabinet 2:
3,3 L volume bass reflex cabinet
with HP100 reflex tube, 110 cm long.
from 99/74 Hz (-3dB/-8dB).

Ground Zero GZPW 15NEO-SPL  

order no. gz-gzpw-15neo-spl

EUR 2999,00 excl. VAT: € 2585.34 / $ 3024.85

38 cm bass driver with high quality cone. The basket is made of die-cast. The driver is made with a double voice coil and the given impedance values are for connection in series. The magnet system is based on Neodymium technology.

  • power handling (continuous/programme) = 3000 W
  • resonance frequency fs = 41,2 Hz
  • impedance R = 2 Ohm
  • sound pressure level SPL = 91,4 dB (2,83V; 1m)
  • DC resistance Re = 1,9 Ohm
  • force factor BL = 37,4 N/A
  • voice coil inductance L = 0,61 mH
  • effective piston radiating area Sd = 829,58 cm2
  • effective mechanical mass incl. air load mms = 560,6 g
  • equivalent volume of compliance Vas = 25,6 l
  • total Q factor Qts = 0,19 (Qms=3,87, Qes=0,2)
  • voice coil diameter = 100 mm
  • maximum peak linear excursion vibration xlin = +/- 30 mm
  • mounting diameter d = 358 mm
  • overall diameter d = 391 mm
  • mounting depth (not countersunk) t = 307 mm
PDF data sheet

Ground Zero GERMANATOR
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recommended cabinet 1:
closed cabinet with 438 L volume
from 35/22 Hz (-3dB/-8dB)

recommended cabinet 2:
1741 L volume bass reflex cabinet
with 4x HP100 reflex tube, 3 cm long.
from 16/14 Hz (-3dB/-8dB).

Ground Zero GERMANATOR  

order no. gz-germanator

EUR 5995,00 excl. VAT: € 5168.10 / $ 6046.68

81 cm bass driver with high quality cone. The basket is made of die-cast. The driver is made with a double voice coil and the given impedance values are for connection in series.

  • power handling (continuous/programme) = 15000 W
  • resonance frequency fs = 24,42 Hz
  • impedance R = 2 Ohm
  • sound pressure level SPL = 94 dB (2,83V; 1m)
  • DC resistance Re = 2 Ohm
  • force factor BL = 30,1 N/A
  • voice coil inductance L = 1,6 mH
  • effective mechanical mass incl. air load mms = 1872 g
  • equivalent volume of compliance Vas = 534 l
  • total Q factor Qts = 0,51 (Qms=5,087, Qes=0,57)
  • voice coil diameter = 160 mm
  • mounting diameter d = 771 mm
  • overall diameter d = 840 mm
  • mounting depth (not countersunk) t = 420 mm
PDF data sheet

The cabinet volume calculations are executed considering an external resistance of 0.3 Ohm. We are using, if no other data is known or available, the information supplied by the manufacturer.

Please note: the frequency response doesn't say much about the cut-off frequency inside the cabinet! Therefore, we mostly give you 2 examples with dimensioning considerations and an indication, how low the loudspeaker will reproduce.

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© Copyright 2020 Iris Strassacker; All rights reserved. - errors and omissions excepted