3. Single Subwoofer SQ
  5. K2 Power SUB25KXE

K2 Power SUB25KXE

1 review

600 Watt

K2 Power SUB25KXE

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
€385.05
-20% €479.00 €385.05
2% discount with credit card

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ProductK2 Power SUB25KXE

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datasheet
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€385.05
€479.00 €385.05

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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

datasheet

Open data sheet

Frequently Asked Questions about K2 Power SUB25KXE

What power does the Focal K2 Power SUB25KXE Subwoofer offer?

The Focal K2 Power SUB25KXE Subwoofer offers a nominal power of 600 Watts RMS, which ensures strong and precise bass. Additionally, the subwoofer can reach a maximum power of up to 1,200 Watts. This allows the device to deliver clear and distortion-free low-frequency reproduction even at high volumes. The combination of a dual voice coil and a K2 aramid fiber diaphragm significantly enhances bass reproduction. The aluminum frame construction also provides a stable base to support the high-performance requirements.

How does the dual voice coil affect the Focal K2 Power SUB25KXE?

The dual voice coil of the Focal K2 Power SUB25KXE, with a diameter of 65 mm, is wound on a fiberglass coil former with four layers of CCAW wire and offers flexible connection options. With a nominal impedance of 4 + 4 Ω, this configuration allows for parallel or series connections to meet different load requirements. This not only provides higher load capacity but also improves consistent thermal and mechanical performance. The innovative coil ventilation system helps keep the coil temperature under control while maintaining optimized sound quality.

What materials are used in the Focal K2 Power SUB25KXE?

The Focal K2 Power SUB25KXE uses high-quality materials to ensure optimal sound performance. The subwoofer features an aluminum frame that increases the stability and durability of the device. The K2 sandwich diaphragm is made of aramid fiber, known for its strength and lightness, allowing for precise bass reproduction. Additionally, the surround is made of butyl rubber with special profiles that eliminate unwanted resonances. The coil former is made of fiberglass, providing additional thermal stability and reduced distortion at high power levels.

How does the diaphragm mass affect the performance of the subwoofer?

The membrane mass of the Focal K2 Power SUB25KXE is 163 g, which enables the Subwoofer to reproduce deep frequencies with high accuracy and precision. A lower membrane mass allows the speaker to respond more quickly to signals, while heavier membranes require more power to achieve the same movement. The aramid fiber K2 membrane, combined with the specific membrane mass, provides a solid balance between weight and strength, supporting distortion-free playback even at extreme volumes.

What role does the resonance frequency play in the Focal K2 Power SUB25KXE?

The resonance frequency of the Focal K2 Power SUB25KXE is 38 Hz, making the Subwoofer ideal for deep, powerful bass reproduction. A lower resonance frequency indicates that the Subwoofer can handle fundamental frequencies without difficulty or distortion. This is crucial for use in larger rooms or open vehicle interiors, where deep frequencies are often difficult to reproduce. The specified resonance frequency shows that the Subwoofer operates efficiently in the lower frequency range and meets the needs of discerning audiophiles.

How are Thiele/Small parameters applied in the Focal K2 Power SUB25KXE?

The Thiele/Small parameters of the Focal K2 Power SUB25KXE, such as a total quality factor (Qts) of 0.52, an electrical quality factor (Qes) of 0.58, and a mechanical quality factor (Qms) of 5, are extremely significant for bass performance. Additionally, the equivalent volume (Vas) is 20 liters. These parameters help design the optimal enclosure for this Subwoofer and make bass reproduction efficient. In particular, the Qts value suggests that the Subwoofer is suitable for use in sealed or bass reflex enclosures, as it allows for both balanced damping and effective air movement.

How should the installation of the Focal K2 Power SUB25KXE in a car be carried out?

The installation of the Focal K2 Power SUB25KXE Subwoofer is relatively straightforward due to its clear dimensions of 10 inches or 25 cm. It is important to measure the space in the vehicle accurately beforehand to ensure that the Subwoofer fits seamlessly into the intended enclosure or mount. The weight of 10.6 kg should also be considered during installation to ensure the structural integrity of the installation location. Thanks to the plug-in terminal block, the wiring process is simplified while allowing for a permanent connection without the connection wires becoming loose during driving.

How does the butyl rubber ring affect the functionality of the subwoofer?

The Focal K2 Power SUB25KXE subwoofer uses a special butyl rubber ring that acts as a seal and supports the diaphragm's vibrations. This rubber profile ensures high flexibility and stability, which are necessary for smooth and distortion-free bass reproduction. The butyl ring reduces mechanical distortions, extends the lifespan of the subwoofer, and ensures that the cone movement remains unobstructed. This is particularly important when high volumes are required, ensuring that the subwoofer remains free of disturbances even under intense use.

What is the significance of the magnetic flux density in the subwoofer?

The magnetic flux density of the Focal K2 Power SUB25KXE is 21.5 N/A, which plays a crucial role in the movement of the voice coil. A higher magnetic flux density ensures that the movement of the coil remains within defined tolerances and that the cone vibrates accurately according to the signal. This improves the accuracy of bass reproduction. The interplay of the magnetic flux density with the voice coil and the K2 diaphragm is crucial for a detailed perception of deep tones, especially at high displacements, ensuring clear and powerful bass.

What type of enclosure should the Focal K2 Power SUB25KXE be installed in?

The Focal K2 Power SUB25KXE subwoofer can be installed in both sealed and bass reflex enclosures, depending on the desired sound characteristics and the Qts value of 0.52. Sealed enclosures provide precise bass and are compact, while bass reflex enclosures offer deeper bass at a larger volume. The equivalent volume (Vas) of the subwoofer is 20 liters, which can serve as a guideline for sizing the enclosure. When choosing an enclosure, it should be considered that it meets the requirements for diaphragm area and maximum displacement range to achieve optimal performance.

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

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