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Focal K2 Power SUB25KXE 10" (25cm) Subwoofer
SKU:  SUB25KXE
EAN:  3544053820842

1 Review

600 Watt

K2 Power SUB25KXE

SKU:  SUB25KXE
EAN:  3544053820842

1 Review

Technical Highlights

  • Rated power: 600 watts RMS, maximum power: 1,200 watts.
  • Rated impedance: 4 + 4 Ω, 65 mm dual voice coil.
  • K2 cone, fiberglass voice coil former, 3 liter driver volume.
  • More technical details
€479,00
€479,00 €479,00
5% discount with credit card
inkl. VAT , possibly plus shipping
Delivery
Jun 5, - Jun 8,
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€479,00
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K2 Power SUB25KXE by Focal Description

The Focal K2 Power SUB25KXE is a 10-inch Subwoofer with a dual voice coil and a K2 cone made of aramid fiber. The rated power is 600 Watts RMS, while the maximum power is 1,200 Watts. The device features an aluminum frame, a special butyl rubber profile surround, and a voice coil ventilation system. The nominal impedance is specified as 4 + 4 Ω. Additional features include a spider with a progressive profile and a detachable terminal block. The voice coil diameter is 65 mm on a fiberglass former with 4 layers of CCAW wire.

Features
  • 10-inch (25 cm) Subwoofer
  • Rated power: 600 Watts RMS
  • Maximum power: 1,200 Watts
  • Impedance: 4 + 4 Ω
  • K2 sandwich membrane made of aramid fiber
  • Butyl rubber profile surround
  • Aluminum frame
  • Dual voice coil with a diameter of 65 mm
  • Fiberglass former
  • Layers: 4
  • Wire: CCAW
  • Driver volume: 3 liters
  • Net weight: 10.6 kg
Technical Specifications
  • Sensitivity (2.83 V / 1 m): 84.5 dB
  • 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 liters
  • Total Q factor (Qts): 0.52
  • Electrical Q factor (Qes): 0.58
  • Mechanical Q factor (Qms): 5
  • Magnetic flux density (Bxl): 21.5 N/A
  • Membrane area (Sd): 327 cm²
  • Maximum displacement (Xmax): 22.5 mm

Focal K2 Power SUB25KXE Datasheet

Open datasheet

Frequently Asked Questions about K2 Power SUB25KXE

What advantages does the K2 cone made of aramid fiber offer in the Focal K2 POWER SUB25KXE?

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 a high-quality, uncolored sound image. Thanks to the K2 sandwich technology, the diaphragm remains torsionally rigid and durable—even at high volume levels and strong bass attacks. If you want more technical background information, you can check out our page on the Focal K2 POWER SUB25KXE, where we explain further details about this special material and its acoustic advantages.

How does the dual voice coil affect bass reproduction?

The dual voice coil of the Focal K2 POWER SUB25KXE is a real power booster 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 watts RMS. This keeps the sound clean and distortion-free even at high levels. If you want detailed tips on wiring the dual voice coil, you can find helpful advice in our Focal Tech blog.

How does the coil ventilation system work in this high-end car subwoofer?

The 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 if you value powerful bass at high levels, the Subwoofer remains temperature stable thanks to the ventilation system. This not only positively affects the lifespan of the speaker but also ensures consistently high sound quality without sacrificing 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.

What role does the progressive spider play in the K2 POWER SUB25KXE?

The progressive spider is a crucial component for controlling the diaphragm travel and centering of the entire drive system. The Focal K2 POWER SUB25KXE features a spider with a progressive profile that maintains a stable travel curve and reduces unwanted noise due to its special shape. With each larger diaphragm displacement point, the spider builds your stability, so you don't have to worry about rattling or imprecise bass even at high levels. Especially if you enjoy bass-heavy music, you will feel this control – the diaphragm moves freely and accurately without distortion. Additionally, it helps minimize unwanted vibrations and resonances. In our guide to Focal spider technology, you can learn more about the background of this innovative design.

How robust is the Focal K2 POWER SUB25KXE in everyday use?

The Focal K2 POWER SUB25KXE is designed for durability and resilience. This is evident in the solid aluminum frame, which not only looks high-quality but also withstands mechanical stress effortlessly. Furthermore, Focal uses 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 material choice. Whether in cold winter temperatures or hot summer days – the SUB25KXE remains stable and consistently delivers rich, deep bass. If you're 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.

What function does the special rubber surround serve in this bass speaker?

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 cone 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.

Does the K2 POWER SUB25KXE fit in vehicles from BMW, Audi, Mercedes, or VW?

In principle, the Focal K2 POWER SUB25KXE is well compatible with many European car brands like BMW, Audi, Mercedes, and VW due to its universal dimensions and flexible impedance of 4 + 4 Ω. However, whether it fits your specific vehicle configuration depends on your trunk design, the existing enclosure installation opening, and the amplifier setup. Although many modern vehicles offer enough space for a 25 cm (10") subwoofer, factors like installation depth and enclosure volume play an important role. You should especially consider the 3 liters of volume that the sub itself occupies in your planning. If you're unsure, take a look at our Focal installation guide, where we have gathered tips and tricks specifically for various vehicle models.

Why does the SUB25KXE have an impedance of 4 + 4 Ω and what does that mean for you?

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 in series to reach 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. Thus, the SUB25KXE 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.

What can I expect from the 600 watts RMS of the Focal K2 POWER SUB25KXE?

With 600 watts 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 at 600 watts without hitting its limits or overheating. Especially if you prefer hip-hop, EDM, or other bass-heavy 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 its performance in our article on the Focal K2 series and its power handling.

How can the K2 POWER SUB25KXE be optimally integrated into an existing sound system?

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 so 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 help you with fine-tuning.

Manufacturer information / responsible person

Focal Naim Deutschland GmbH

Darius R. Świderski

Hainbuchenweg 14–18
21224 Rosengarten
Germany

Phone: +49 4105 77050
Fax: +49 4105 770529
E-mail: info@focal-naim.de