GROUND ZERO GZHK 165 165mm High Power Midwoofer Owner’s Manual
- June 3, 2024
- Ground-Zero
Table of Contents
GROUND ZERO GZHK 165 165mm High Power Midwoofer Owner’s Manual
Features
- Kickwoofer / midwoofer with powerful sound character
- Klippel® optimized
- Non-pressed paper cone
- GZ-design aluminum cast basket
- Powerful ferrite motor
- Durable rubber surround
- Hexagon style protection grill
General installation note
- Never drill a hole to the vehicle´s gas tank or brake lines, to wirings or any other important vehicle parts!
- Never pass wires over sharp edges or vehicle parts to avoid any kind of damage
- Keep the wiring away from the antenna and electronic devices contributing to radio reception
- Lay the power supply wiring always separated from speaker wiring to avoid disturbance
- Use adequately dimensioned power and speaker wires to connect the components
Safety instructions
Safety instructions: Keep all parts of the content and the packaging away
from children and pets to avoid accidents and the risk of suffocation.
Permanently extreme levels of over 85 dB can lead to irreparable damage to the
hearing. Music systems with high amplifier output power can reach levels of
130 dB or more. Extreme levels can also hinder the perception of important
traffic noises and distract from what is happening on the road. Ground Zero
GmbH and its sales partners expressly assume no responsibility for hearing
damage, physical damage or any damage to property or consequential damage
resulting from improper or careless use or improper installation of its
products. In particular, any claims are forfeited through the use under
competitive conditions.
Manufacturer’s declaration: Hereby, Ground Zero GmbH declares that this
product conforms to the rules of the following EU directives (including all
applicable changes): 2011/65 / EU RoHS2 and 2001/95 / EC directive on general
product safety.
The full text of the EU declaration of conformity is available at www.ground
zero-audio.com. Loudspeakers contain magnetized metals and some valuable raw
materials and must not be disposed of with normal household waste. Please
leave defective or no longer required components to a local recycling facility
at the end of their practical use.
Terms of warranty
The limited warranty for this product is covered by GROUND ZERO´s regional distribution partners and their terms and conditions. For further information contact your local retailer or distributor.
Specifications
| model | GZHK 165 |
|---|---|
| voice coil (diameter & material) | 2-lagig 38 mm CCA / 2-layer 1.5” CCA |
| (Magnet) / motor (magnet) | Y35 Ferrit / Y35 ferrite |
| (Material) cone (material / diameter) | Geschöpftes Papier / non-pressed paper |
122 mm / 4.8“
efficiency (SPL)| 87 dB
(nominal) / impedance (nominal) Re| 4 / 3.31 Ohm/ohms
Qms – Qes – Qts – Rms| 2.88 – 0.58 – 0.49 – 1.75 kg/s
Mms – Cms – BL – Le – Vas| 16.3 g – 0.64 mm/N – 5.4 N/A – 0.09 mH – 15.9 L
resonance frequency (Fs)| 49.4 Hz
max. excursion (Xmax)
(peak to peak – linear)
| 16 mm / 0.63” – 8 mm / 0.32”
frequency response| 40 Hz – 5000 Hz
power handling (nominal/max)| 120 / 180 Watt / Watts
outer diameter mounting diameter mounting depth| 165 mm / 6.5”
144 mm / 5.67”
69 mm / 2.72”
Verified with KLIPPEL®
GROUND ZERO is using the worldwide accepted KLIPPEL® R&D Analyzer KA3
measurement system for speaker development during the German in-house
development as well as for QC reporting for most production lines at the
factory. The results of LPM and LSI measurements are the basis for evaluating
and verifying further development enabling to offer perfectly working products
in any practical application. Continuous and advanced trainings for
development employees ensure the highest possible qualification.
KLIPPEL® is a registered trademark of KLIPPEL GmbH
Respect the Music
Listening to music can be emotional, impressive, relaxing or enjoyable. At that, it doesn´t really matter what kind of music is the personal favorite, whether it´s Instrumental, Jazz, Electro, Latin, Classic, Rock or any other music direction. However, audio reproduction quality at each desired volume is elementary. Some music styles require higher levels while others prefer the soft tones. GROUND ZERO considers all the different wishes of customers during the development of new products. Along with this, the target is to create the most realistic sound, to transfer the soul of the music and the intention of the performer. Summarized to one phrase: RESPECT THE MUSIC!
Noise damping
Simple or thin surfaces and panels of the car´s body and in the vehicle´s interior tend by stimulation to vibrations, in particular by vibrations that arise while driving or when playing music with the speaker cones. In order to reduce the resulting booming, the natural resonance, means the frequency at which these surfaces resonate particularly strongly, must be reduced. For this purpose, the insulation of aluminum-butyl requires the largest possible mass. For this purpose, GROUND ZERO offers materials with different properties and basis weight. In addition, the GROUND ZERO range offers other products, such as self-adhesive aluminum plates or sound-absorbing foam mats, which improve the result even more. The bonding of these materials drastically changes the tendency of body parts tooscillate, which significantly reduces the unwanted noise level.
GROUND ZERO Produkte werden in Deutschland entwickelt
GROUND ZERO products are engineered in Germany
GROUND ZERO – international sponsor of
Ground Zero GmbH
Erlenweg 25, 85658 Egmating, Germany
Tel. +49 (0)8095/873 830 Fax -8310
www.ground-zero-audio.com