3. Ultra K-165

Ultra K-165

100 Watt

Ultra K-165

Technical Highlights

  • Power of 100/160 watts RMS/max, impedance at 4 ohms.
  • Flow-optimized spokes, lightweight carbon membrane.
  • Frequency response from 45 Hz – 5000 Hz, resonance frequency at 43 Hz.
  • More technical details
€1,995.00
€1,995.00 €1,995.00
2% discount with credit card

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ProductUltra K-165

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datasheet
Ground Zero-Ultra K-165-6.5" (16,5cm) Tiefmitteltöner-masori-kaufen
€1,995.00
€1,995.00 €1,995.00

The Ultra K-165 from Ground Zero is a 6.5-inch mid-bass speaker with a power handling of 100 Watts RMS and 160 Watts Max. The device has an impedance of 4 Ohms and an efficiency of 87 dB. The technical design includes a lightweight carbon fiber sandwich membrane as well as a highly flexible rubber surround with linear guidance. A ventilated voice coil former and a round voice coil wire made of CCA are integrated. The enclosure is equipped with flow-optimized spokes made of aluminum die-cast. The voice coil has a diameter of 32.5 mm. The frequency response ranges from 45 Hz to 5000 Hz.

Features
  • 6.5-inch (16.5 cm) mid-bass speaker
  • Lightweight carbon fiber sandwich membrane
  • Highly flexible rubber surround with linear guidance
  • Ventilated voice coil former
  • Round voice coil wire made of CCA
  • Flow-optimized spokes made of aluminum die-cast
  • Tightly tolerated technical parameters
  • Documented technical final inspection
  • Wood packaging and selected in pairs
  • GZ ULTRA 165-GRILL protective grille sold separately
Technical Specifications
  • Power handling: 100 Watts RMS
  • Power handling: 160 Watts Max
  • Impedance: 4 Ohms
  • Efficiency: 87 dB
  • Frequency response: 45 Hz – 5000 Hz
  • Voice coil diameter: 32.5 mm
  • Mounting diameter: 147 mm
  • Mounting depth: 67 mm
  • Resonance frequency (Fs): 43 Hz
  • Diameter: 165 mm

Frequently Asked Questions about Ultra K-165

What distinguishes the Carbon-Fleece Sandwich Membrane of the Ultra K-165?

The Carbon-Fleece Sandwich Membrane of the Ultra K-165 from Ground Zero is a true milestone if you are looking for the highest sound quality for your vehicle. Especially if you enjoy listening to music loudly, you will be thrilled by the quick response and precise reproduction. This special composite structure combines a lightweight yet very stable material, ensuring high impulse fidelity. You particularly benefit from clear mids and a rich bass foundation. Because the membrane is also very resilient, it retains its shape even under high stress. This leads to a very natural and uncolored sound image. Furthermore, the low weight minimizes unwanted vibrations, so disturbing resonances hardly occur. In this way, you get an impressive sound experience that accompanies you on the go and convinces in every driving situation.

How does the extended rubber surround affect the sound image?

The extended rubber surround of the Ultra K-165 ensures that the woofer can vibrate precisely and controlled even at higher volumes. This keeps the membrane guidance stable, delivering particularly clean bass. If you like to crank up powerful beats, you will notice how clean and punchy the low frequencies are reproduced. Thanks to the linear guidance, unwanted distortions are minimal, so you won't experience any booming or rattling even at high levels. Additionally, the rubber surround adapts optimally to the respective membrane excursions, making the speaker extremely durable. Whether you prefer your favorite rock tracks, electronic music, or pop hits – the clean low-frequency reproduction is always maintained and brings a balanced sound spectrum to your car.

What role does the ventilated voice coil former play in terms of heat dissipation and distortion reduction?

A ventilated voice coil is far more than just a nice extra in the Ultra K-165 from Ground Zero. The specially designed ventilation allows the heat generated during operation to be effectively dissipated. If you enjoy listening to loud music for extended periods, you benefit doubly from this design: on one hand, the risk of overheating is minimized, which extends the durability of the car audio speaker. On the other hand, the voice coil always remains within the optimal temperature range, reducing distortion and keeping the sound stable. Especially with music that has a lot of deep bass, adequate heat dissipation is crucial, as high power reserves are required. The ventilation concept also ensures consistent performance in the long term – so your favorite songs always sound their best.

What is the power handling of this speaker and why is it relevant?

The Ultra K-165 has an RMS power handling of 100 watts and a maximum power handling of 160 watts. At first glance, these values may seem like mere numbers, but they are extremely important for your overall system. For example, if you are using an amplifier, you should ensure that it matches the power range of this high-end car speaker. Only then will you achieve the desired clarity and powerful volume from your system. Too low a power level leads to sound quality losses, while too high a power level from the amplifier could damage the voice coil. With the high power handling, you can enjoy your music at a high level for longer periods without compromising sound quality.

How precise are the technical parameters of the Ultra K-165 and why is that important?

The exact technical parameters of the Ultra K-165 – such as resonance frequency, sensitivity, or impedance – are the result of highly precise manufacturing by Ground Zero. For example, each component is carefully tuned, providing you with an authentic and balanced sound. With an efficiency of 87 dB and a resonance frequency of 43 Hz, this 6.5-inch woofer shows that it is designed for a wide frequency range. Especially if you listen to various music genres, you will be fascinated by the clear sound image and harmonious voice. At the same time, precise adherence to the manufacturer's specifications means you can integrate the speaker much more accurately into your car audio system. The result? Better sound balance and fewer disruptive frequency overlaps.

Is it compatible with common European car brands like BMW, Audi, Mercedes, or VW?

In principle, the Ultra K-165 from Ground Zero can be installed in many vehicle models, including common European car brands like BMW, Audi, Mercedes, or VW. However, you should always check the available installation diameter of 147 mm and the installation depth of 67 mm before installation to ensure everything fits smoothly. This is especially crucial if you own a vehicle with limited space in the door panel; these dimensions are decisive. If you are unsure, you can contact the manufacturer or check our technical section to ensure everything is correctly positioned. When installed correctly, your vehicle's sound will noticeably improve, allowing you to enjoy an intense listening experience on every drive.

What advantages does the round voice coil wire made of CCA offer?

The round voice coil wire made of CCA (Copper-Clad Aluminium) provides you with several advantages. Firstly, it reduces the overall weight of the voice coil, which leads to a faster response time. You will notice that low frequencies are reproduced more punchy and very precisely. Secondly, the copper coating dissipates heat much more effectively than pure aluminum, which increases thermal resilience. If you enjoy longer music sessions at high levels, the coil remains stable, and distortion is kept to a minimum. Additionally, the combination of an aluminum core and a copper shell allows for a balanced mix of electrical conductivity and mechanical robustness. This results in a subwoofer that is durable and impressively delivers a dynamic, balanced sound.

Why are flow-optimized spokes made of aluminum die-cast a technical advantage?

Flow-optimized spokes made of aluminum die-cast serve multiple purposes in a high-end car speaker. Firstly, their reinforced structure ensures that the entire speaker remains stable. The aluminum housing is robust and provides good resonance control, which is particularly crucial in the low-frequency range. Additionally, airflows behind the diaphragm can circulate more efficiently. This prevents disruptive air turbulence that could affect the sound. When you play loud and bass-heavy music, you will feel the clean reproduction: less unwanted background noise and vibrations. Furthermore, the die-casting process ensures consistent manufacturing quality, guaranteeing you a consistently high product quality, as well as a long lifespan and an appealing design.

What does the documentation of the technical final inspection mean for you?

With speakers like the Ultra K-165 from Ground Zero, the documentation of the technical final inspection indicates a very high quality standard. Before shipping, the speakers are thoroughly tested to ensure that they precisely meet the specifications regarding frequency response, resistance, and other parameters. For you, this specifically means that you can rely on consistent performance without fearing deviations between individual units. Especially when you carefully match your Car Audio components, you benefit from this reliability. The inspection reduces the likelihood of manufacturing defects and guarantees you a mid-bass speaker that truly delivers on its promises—whether for subtle listening or cranking up your favorite playlist.

Why can investing in the Ultra K-165 be particularly worthwhile if you place a high value on sound quality?

If you are looking for a Car Audio speaker that offers top performance both acoustically and technically, the Ultra K-165 is an excellent choice. The lightweight carbon fleece sandwich diaphragm provides defined bass and clear mids, while the highly flexible rubber surround minimizes distortion. Thanks to the ventilated voice coil former and the round voice coil wire, you get high durability as well as solid heat dissipation, allowing you to enjoy reliable music even over longer periods. Especially if you like to test different music genres, you will feel the acoustic flexibility and richness of detail that this mid-bass speaker brings. And if you want to learn more about it, check out the additional information on the Ground Zero product range to cohesively expand your entire Car Audio System.

Manufacturer information/responsible person

Ground Zero GmbH
Erlenweg 25
85658 Egmating, Germany

Tel +49 (0)8095 873 830

E-Mail: info@ground-zero-audio.com

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