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Focal

K2 Power SUB25KXE

10" (25cm) Subwoofer

479,00€
479,00€ 479,00€
incl. VAT , possibly plus shipping

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Highlights

  • Rated power of 600 watts RMS, maximum power of 1,200 watts.
  • Nominal impedance of 4 + 4 Ω, DC resistance of 3.2 + 3.2 Ω.
  • K2 cone made of aramid fiber, aluminum frame, 10.6 kg weight.
Seen more cheaply Personal Offer
brand: Focal
Delivery time:
Available for delivery, with you in 1-4 days
Number:
Piece
Watt RMS:
600
Subwoofer Type:
ferrite
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Focal-K2 Power SUB25KXE-10" (25cm) Subwoofer-masori-kaufen
479,00€
479,00€ 479,00€

Discover the powerful sound of the K2 Power SUB25KXE from Focal, a 10" (25 cm) subwoofer known for its outstanding performance and quality. With a robust K2 cone made of aramid fiber and a dual voice coil, this subwoofer delivers an impressive rated power of 600 watts RMS and a maximum power of 1,200 watts. The special rubber profile surround and the aluminum frame ensure durability and stability. Thanks to the progressive spider and the detachable terminal block, it is easy to install and handle. The high load capacity and low nominal impedance of 4 + 4 Ω make the K2 Power SUB25KXE an ideal choice for sound enthusiasts.

Technical Data

  • K2 Cone made of aramid fiber
  • Spider with progressive profile
  • Special rubber profile seals
  • Aluminium frame
  • Motor unit with dual voice coil
  • Plug-in terminal block
  • spool ventilation system
  • High load capacity

Specifications

  • Rated power: 600 W RMS
  • Maximum power: 1,200 W
  • Sensitivity (2.83 V / 1 m): 84.5 dB
  • Membrane: K2 Sandwich
  • Surround: Butyl
  • Nominal impedance: 4 + 4 Ω
  • DC resistance: 3.2 + 3.2 Ω
  • Diameter of the vibrating coil: 65 mm
  • Spool carrier: fiberglass
  • Layers: 4
  • Wire: CCAW
  • Net weight: 10.6 kg
  • Volume of the driver: 3 l

Parameter

  • DC resistance (Rdc): 3.2 + 3.2 Ω
  • Resonance frequency (Fs): 38 Hz
  • Membrane mass (Mms): 163 g
  • Compliance (Cms): 0.12 mm/N
  • Equivalent Volume (Vas): 20 l
  • Total Quality Factor (Qts): 0.52
  • Electrical quality (Qes): 0.58
  • Mechanical Quality (Qms): 5
  • Magnetic flux density (Bxl): 21.5 N/A
  • Membrane area (Sd): 327 cm²
  • Sound Pressure Level (SPL): 84.5 dB
  • Maximum deflection path (Xmax): 22.5 mm
The K2 cone made of aramid fiber is a central feature of the Focal K2 POWER SUB25KXE and gives this car audio subwoofer its distinctive sound character. Aramid fiber is known for its high stiffness while being lightweight. This allows the diaphragm to respond particularly quickly and precisely to music signals, providing you with clear and nuanced bass reproduction. Especially if you enjoy listening to music at high volumes and don't want to miss important subtleties in the deep bass range, you will benefit from the dynamics of the K2 cone. Additionally, this robust fiber blend ensures a low distortion rate, resulting in an overall high-quality, uncolored sound image. Thanks to the K2 sandwich technology, the diaphragm remains torsionally rigid and resilient – even at high volume levels and strong bass attacks. If you would like more technical background information, you can visit our subpage on the Focal K2 POWER SUB25KXE, where we explain further details about this special material and its acoustic advantages.
The dual voice coil of the K2 POWER SUB25KXE from Focal is a true power amplifier for your bass range. With two separately connected coils (4 + 4 Ω), you can flexibly respond to different amplifier and wiring configurations. Especially in more complex car audio setups, you can connect the coils in parallel or in series to optimally adjust the impedance. This not only increases control over the subwoofer but also contributes to a more precise and powerful reproduction of deep bass frequencies. The coils are wound on a stable fiberglass carrier, which allows for optimal heat dissipation and increases the load capacity to 600 W RMS. This keeps the sound clean and distortion-free even at high levels. If you want detailed instructions on wiring the dual voice coil, you can find helpful tips in our Focal Tech blog.
The coil ventilation system in the Focal K2 POWER SUB25KXE ensures that the woofer stays cool even under prolonged use – and that is literally true. Behind the aluminum frame is a specially designed opening that directs air along the voice coil. This continuous airflow prevents excessive heat buildup during intense bass runs. Especially when you place a high value on powerful bass at loud levels, the subwoofer remains thermally stable thanks to the ventilation system. This, in turn, not only positively affects the lifespan of the speaker but also ensures consistently high sound quality without compromising dynamics. If you're looking for more information on the cooling technology of Focal key products, feel free to check out our summary on heat management.
The progressive spider is a crucial building block for controlling the diaphragm movement and centering of the entire drive system. The Focal K2 POWER SUB25KXE features a spider with a progressive profile, which maintains a stable excursion curve due to its special shape and reduces unwanted noise. With each larger diaphragm excursion point, the spider builds your stability, allowing you to enjoy deep bass without worrying about distortion or imprecision, even at high levels. Especially if you enjoy bass-heavy music, you will feel this control – the diaphragm moves freely and accurately without overdriving. Additionally, it helps to minimize unwanted vibrations and resonances. In our guide to Focal spider technology, you can learn more about the background of this innovative design.
The Focal K2 POWER SUB25KXE is designed for durability and resilience. This is evident, among other things, in the solid aluminum frame, which not only looks high-quality but also withstands mechanical stresses effortlessly. Additionally, Focal relies on a specially designed rubber profile surround that absorbs both mechanical vibrations and external influences. Especially if you often drive long distances and the subwoofer needs to perform over an extended period, you will benefit from this choice of materials. Whether in cold winter temperatures or hot summer days – the SUB25KXE remains stable and consistently delivers rich, deep bass. If you are looking for more tips on the care and maintenance of Focal bass speakers, feel free to check out our advice section, where we provide you with more practical tips.
The rubber surround is not just a simple seal, but a key element for the sound quality and durability of the K2 POWER SUB25KXE. The special profile keeps the diaphragm edge flexible enough to accurately reproduce large excursions and effectively dampen vibrations. This helps you maintain clean impulse fidelity during intense bass runs without distortion. Additionally, the surround contributes to protection against dust and moisture – especially in vehicle environments where temperature fluctuations and road dirt can play a role. The balanced combination of stiffness and flexibility makes this high-end car subwoofer versatile and ensures that you will enjoy deep and powerful bass frequencies for a long time. You can find more about material selection at Focal in our article on manufacturing techniques.
Basically, the Focal K2 POWER SUB25KXE is well compatible with many European car brands such as BMW, Audi, Mercedes, and VW due to its universal dimensions and flexible impedance of 4 + 4 Ω. However, whether it fits into your specific vehicle configuration depends on your trunk design, the existing enclosure installation opening, and the amplifier setup. Because although many modern vehicles offer enough space for a 25 cm (10") subwoofer, factors such as installation depth and enclosure volume play an important role. In particular, the 3 liters of volume that the sub itself occupies should be included in your planning. If you are unsure, take a look at our Focal installation guide, where we have collected tips and tricks specifically for different vehicle models.
The nominal impedance of 4 + 4 Ω in the Focal K2 POWER SUB25KXE gives you a high degree of flexibility when connecting to different amplifier systems. You can connect the two voice coils in parallel to achieve a lower total impedance, or connect them in series to achieve a higher impedance. This allows you to use the subwoofer in both smaller single-sub setups and larger systems, for example, if you want to use multiple bass speakers. Especially with powerful amplifiers, it is important to adjust the resistance appropriately to achieve optimal performance. The SUB25KXE thus opens up various possibilities for optimizing your bass performance. If you would like to learn more about the nuances of impedance matching, we recommend our technical guide on Focal Car Audio setups.
With 600 W RMS, the K2 POWER SUB25KXE has a continuous power handling that offers real room for volume and sound quality. This means that the subwoofer can be continuously powered with 600 watts without hitting its limits or overheating. Especially if you prefer hip-hop, EDM, or other bass-intensive music genres, you will benefit from the impressive endurance of this bass speaker. It plays confidently and with low distortion, even when you really push it. The maximum power of 1,200 W also shows that the SUB25KXE can easily handle short-term peak loads. By fully utilizing its potential, you can create a powerful and clear bass foundation. You can find more details about the performance characteristics in our article on the Focal K2 series and its power handling.
For a seamless integration of the Focal K2 POWER SUB25KXE into your existing car audio setup, you should consider a few factors. First, the choice of the right amplifier is crucial: make sure that the power reserves and impedance settings perfectly match the dual voice coils. Second, the enclosure volume is of great importance – although 20 l is specified as the Vas value, a tuned bass reflex or sealed enclosure is recommended to reproduce the strong bass accurately. Third, ensure that you choose the crossover frequency in such a way that the mids and highs are not neglected. Especially if you are a true music lover, a well-tuned system will ensure that you benefit from every frequency range. For further inspiration, we have compiled detailed tips in our article "Properly Measuring Focal Subwoofers" to assist you with fine-tuning.

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Axel Mohren
Langwadener Straße 60
DE 41516 Grevenbroich
Germany

Contact: info@ampire.de

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Product Specifications

Manufacturer

Focal

Product type

10" (25cm) subwoofer

Features

  • Highlights

    • Rated power of 600 watts RMS, maximum power of 1,200 watts.
    • Nominal impedance of 4 + 4 Ω, DC resistance of 3.2 + 3.2 Ω.
    • K2 cone made of aramid fiber, aluminum frame, 10.6 kg weight.

  • Uvp

    139

weight

10.6 kg

Technical data

Watt RMS Load Capacity

600

configurators

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Your advantages with Masori

Maximum and rated power of the Focal K2 POWER SUB25KXE subwoofer for powerful bass

With a rated power of 600 watts RMS and a maximum power of 1,200 watts, the Focal K2 POWER SUB25KXE delivers outstanding power delivery, ensuring deep and precise bass. These high power ratings allow the subwoofer to deliver consistent performance even under demanding sound conditions. A higher rated power would require more power but could compromise longevity. The offered rated power is optimally tuned for intensive use in high-quality car hi-fi systems, allowing you to enjoy an immersive sound experience.

Impedance of 4 + 4 Ω: Flexibility in driving for optimal sound quality

The Focal K2 POWER SUB25KXE offers a nominal impedance of 4 + 4 Ω, allowing for flexible connection to various amplifier configurations. This dual impedance allows the subwoofer to be operated in parallel or series to optimally adapt the power to your audio system. A lower impedance value could result in higher current consumption, but in this case, this is compensated for by the robust construction. This impedance ensures efficient power transfer and minimizes signal loss, contributing to clear and powerful bass reproduction.

K2 Aramid Fiber Cone: High-strength materials for superior sound reproduction

The subwoofer features a K2 cone made of aramid fiber, known for its high strength and low weight. This material allows for precise vibration control and minimizes distortion, significantly improving sound quality. A higher fiber density or alternative materials could affect flexibility or weight, but aramid fiber offers an optimal balance between rigidity and lightweight. This results in clear and detailed bass reproduction that accurately reproduces even the subtlest nuances in the sound.

Dual 65 mm diameter voice coil for enhanced performance

The motor unit of the K2 POWER SUB25KXE is equipped with a dual voice coil with a diameter of 65 mm. This design allows for higher current consumption and improved heat dissipation, significantly increasing the subwoofer's performance. While a larger voice coil would further increase efficiency, it could increase weight and complexity. The selected size offers an optimal balance between performance and handling, ensuring stable and powerful bass reproduction.

Sensitivity of 84.5 dB: Efficient sound delivery for dynamic bass

With a sensitivity of 84.5 dB (2.83 V/1 m), the K2 POWER SUB25KXE offers efficient sound delivery, enabling direct and dynamic bass reproduction. This value ensures that the subwoofer delivers powerful performance even with lower input voltages, facilitating integration into various car hi-fi systems. A higher sensitivity could result in excessively loud reproduction, while a lower sensitivity would require greater amplification. The selected value is optimally tuned for powerful yet controlled bass reproduction.

Thiele-Small Parameters: Precise tone control with Fs of 38 Hz and Qts of 0.52

The K2 POWER SUB25KXE features a resonant frequency (Fs) of 38 Hz and a quality factor (Qts) of 0.52. These Thiele-Small parameters significantly determine the resonance and damping characteristics of the subwoofer, resulting in precise and deep bass reproduction. A lower Fs value would allow for lower frequencies but could compromise system stability. The Qts value of 0.52 ensures a balanced damping and resonance, supporting a clear and powerful bass reproduction.

Robust construction with special rubber profile surround and aluminum frame for durability

The Focal K2 POWER SUB25KXE features a special rubber surround and an aluminum frame, which together ensure high stability and durability. This combination protects the subwoofer from mechanical stress and vibrations that may occur during operation. A stronger frame or alternative sealing materials could increase the weight, but the chosen construction offers an optimal balance between stability and weight. This ensures that the subwoofer remains reliable and stable even under extreme operating conditions.

Coil ventilation system: Efficient cooling for lasting performance

The K2 POWER SUB25KXE features a sophisticated coil ventilation system that ensures effective heat dissipation during operation. This system prevents the voice coils from overheating, ensuring consistent performance even during extended use. An inefficient ventilation system could lead to overheating and thus a loss of performance or damage. The advanced cooling technology in the K2 POWER SUB25KXE ensures stable and reliable bass performance over long periods of time.

Membrane area of ​​327 cm² and maximum excursion of 22.5 mm for dynamic bass

With a diaphragm area of ​​327 cm² and a maximum excursion of 22.5 mm, the Focal K2 POWER SUB25KXE offers impressive dynamics and depth in bass reproduction. A larger diaphragm area could further increase efficiency, but would increase weight and the required drive power. The selected excursion enables a powerful yet controlled bass movement, supporting precise and dynamic sound reproduction. This ensures an intense and immersive listening experience in your vehicle.

Lightweight construction with a net weight of 10.6 kg for easy installation

The Focal K2 POWER SUB25KXE weighs 10.6 kg, making it relatively lightweight and easy to install despite its robust construction. A higher weight might increase stability, but would complicate handling and installation. The balanced weight allows for easy positioning and installation in the vehicle without compromising durability. This feature makes the subwoofer ideal for a variety of vehicle types and installation conditions.

Pluggable terminal block: Easy wiring and installation

The pluggable terminal block integrated into the K2 POWER SUB25KXE allows for straightforward and secure wiring of the subwoofer. This significantly simplifies the installation process and reduces the risk of cable connection errors. A permanently soldered terminal block could limit flexibility and complicate installation. The pluggable solution makes setup more efficient and user-friendly, saving time and effort.

Spiders with progressive profile: optimal flexibility and stability

The K2 POWER SUB25KXE's spider features a progressive profile, ensuring optimal flexibility and stability of the cone. This design allows for precise control of the cone's movements, improving sound quality. A uniform spider without progression could lead to unwanted resonances that impair sound reproduction. The progressive design ensures even loading and extends the lifespan of the subwoofer.

Membrane mass of 163 g and compliance of 0.12 mm/N for precise sound reproduction

The diaphragm of the K2 POWER SUB25KXE has a mass of 163 g and a compliance of 0.12 mm/N, allowing for precise control of the diaphragm movements. While a higher diaphragm mass might increase stability, it would reduce the responsiveness and precision of sound reproduction. The selected values ​​offer an optimal balance between lightness and control, resulting in clear and detailed bass reproduction. For installation assistance, use our on-site installation service in Frankfurt (Oder) or visit our expert support FAQ & Help . Deepen your knowledge in the masori.de audio blog .