Ground Zero GZPW Reference 250 Service Manual
GZPW REFERENCE 250
GROUND ZERO GmbH – Erlenweg 25 – 85658 Egmating – Germany
GroundZeroAudioCom
www.ground-zero-audio.com
info@ground-zero-audio.com
Product name
GZPW Reference 250
Product type
Subwoofer chassis
H.Art .nr.
125053
Diameter
275 mm / 10.8“
Mounting diameter
235 mm / 9.25“
Mounting depth
128 mm / 5.04“
Magnet dimension
2 x 133x 19 mm
Total weight
5,1 KG / 11.244 lb
Voice coil diameter
50 mm / 2 “ Round Wire
Voice coil winding height
35 mm / 1.38“
Voice coil wire material
Copper
Voice coil former material
Glass Fiber
Top plate height
6 mm / 0.236“
Linear excursion (one direction)
15 mm / 0.59 “
Effective Xmax
40 mm / 1.57“
Top Plate and T-Yoke color
Black
Basket material
Aluminium Cast
Basket color
Black matt
Spider
1x BIMAX
1x Connex
Surround
Rubber
Cone
3 Layer Sandwich
Dustcap
Pressed paper
Magnetcover
Machined & polished Alu
Gasket
Aluminum
Terminal
Chrome push terminal
Power handling
500 WRMS
Impedance
2 x 2 Ohm
Re
3.8 Ohm
Res
54.7 Ohm
FS
31.3 Hz
Qms
7.22
Qes
0.43
Qts
0.40
Rms
3.2 kg/s
Cms
0.22 mm/N
Mms
119.1 gr
BL
14.4 N/A
SPL
86 dB
VAS
36.5 L / 1.29 cu.ft
Le
0.94 mH
Recommended freq. response
20 – 60 Hz
Subsonic: 20Hz @ min24dB
LPF: 50 - 60Hz @ min 12dB
Recommended amplifier power
300 – 600 WRMS @ 4 Ohm (1 Ohm)
Sound Quality
JJJJJJ (max. JJJJJJ)
SPL Competition
(max. JJJJJJ)
Low bass performance 20-50Hz
JJJJJJ (max. JJJJJJ)
Mid bass performance 50-80Hz
JJJJJJ (max. JJJJJJ)
GZPW REFERENCE 250
A
275 mm / 10.8“
B
235 mm / 9.25“
C
128 mm / 5.04“
D
142 mm / 5.59“
E
6 mm / 0.236“
TECHNICAL SPECIFICATIONS
A
D
B
C
E
GROUND ZERO GmbH – Erlenweg 25 – 85658 Egmating – Germany
GroundZeroAudioCom
www.ground-zero-audio.com
info@ground-zero-audio.com
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