3. Single Subwoofer SQ
  5. K2 Power SUB25KXS

K2 Power SUB25KXS

1 review

350 Watt

K2 Power SUB25KXS

1 review

Technical Highlights

  • Power 350 watts RMS, impedance 4 ohms, maximum 700 watts.
  • K2 sandwich cone, butyl surround, voice coil 45 mm Ø.
  • Resonant frequency 35 Hz, sensitivity 84.5 dB, Mms 180g.
  • More technical details
€396.57
-21% €499.00 €396.57
2% discount with credit card

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ProductK2 Power SUB25KXS

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datasheet
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€396.57
€499.00 €396.57

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The K2 Power SUB25KXS from Focal is a Subwoofer with a diameter of 10 inches (25 cm). The rated power is specified at 350 Watts RMS, while the maximum power is 700 Watts. The diaphragm material uses a K2 sandwich construction, combined with a butyl surround. The nominal impedance of the chassis is 4 Ohms. The voice coil diameter is 45 mm. The net weight of the component is 4.7 kg.

Features
  • 10 inches (25 cm) Subwoofer
  • Rated power: 350 Watts RMS
  • Maximum power: 700 Watts
  • K2 sandwich diaphragm
  • Butyl surround
  • Nominal impedance: 4 Ohms
  • Voice coil diameter: 45 mm
  • Net weight: 4.7 kg
Technical Specifications
  • Sensitivity (2.83V/1m): 84.5 dB
  • F-3 (20 liters): 36 Hz
  • DC resistance (Rdc): 3.2 Ohms
  • Resonance frequency (Fs): 35 Hz
  • Moving mass (Mms): 180 g
  • Compliance (Cms): 0.12 mm/N
  • Equivalent volume (Vas): 18 liters
  • Total Q (Qts): 0.8
  • Electrical Q (Qes): 0.97
  • Mechanical Q (Qms): 5
  • Force factor (Bxl): 11.5 N/A
  • Effective diaphragm area (Sd): 327 cm²
  • Linear excursion (Xmax): 14 mm

datasheet

Open data sheet

Frequently Asked Questions about K2 Power SUB25KXS

What are the technical specifications of the Focal K2 Power SUB25KXS Subwoofer?

The Focal K2 Power SUB25KXS offers a nominal power of 350 Watts RMS and a maximum power of 700 Watts. It features a K2 sandwich cone and has a butyl surround. The nominal impedance is 4 Ohm, with a voice coil diameter measuring 45 mm. It weighs 4.7 kg net, has a sensitivity of 84.5 dB at 2.83V/1m, and shows a resonance frequency of 35 Hz. Other parameters include: a moving mass of 180 g, a compliance of 0.12 mm/N, an equivalent volume of 18 liters, a total Q of 0.8, and a linear excursion of 14 mm.

What design does the Focal K2 Power SUB25KXS Subwoofer use?

The Focal K2 Power SUB25KXS Subwoofer utilizes an advanced K2 sandwich cone, which consists of strategically arranged layers to ensure maximum stability and excellent acoustic performance. This type of construction helps minimize harmonic distortion by controlling unwanted vibrations. The design is complemented by a butyl surround, which provides additional flexibility and durability. With an effective cone area of 327 cm² and a linear excursion of 14 mm, the subwoofer offers remarkable bass capabilities. The Focal SUB25KXS is designed to impress in both sound pressure and tonal precision.

How does the nominal impedance of the Focal K2 Power SUB25KXS affect its performance?

The nominal impedance of the Focal K2 Power SUB25KXS Subwoofer is 4 Ohm, making it an ideal choice for most modern amplifier systems that support this impedance as standard. A lower impedance means that the subwoofer offers relatively less resistance, allowing it to absorb power more efficiently and produce dynamic bass tones. The DC resistance is 3.2 Ohm, indicating that the subwoofer operates optimally with amplifiers specifically tuned to these impedances. This ensures that the sound remains powerful and clean, even at higher volumes.

How do the voice coil specifications affect the Focal K2 Power SUB25KXS Subwoofer?

The Subwoofer features a voice coil with a diameter of 45 mm. This measurement allows for greater panoramic freedom and efficiency in producing deep frequencies. A larger voice coil can support higher electrical currents and tends to have less thermal compression, meaning that the Subwoofer maintains its acoustic integrity at high output levels. The force factor is 11.5 N/A, an indicator of the effective magnetic field strength that the coil cuts through. This combination significantly contributes to the Subwoofer's ability to produce clean and powerful bass output over extended periods.

What frequency characteristics does the Focal K2 Power SUB25KXS have?

The Focal K2 Power SUB25KXS Subwoofer is characterized by a resonance frequency (Fs) of 35 Hz. This indicates that the Subwoofer naturally tends to reproduce deep frequencies with high efficiency. The frequency roll-off point at -3 dB (F-3) is 36 Hz in a 20-liter enclosure. Such a characteristic marks the SUB25KXS as particularly suitable for reproducing deep, undistorted bass while maintaining accuracy and musical nuances. The total quality factor (Qts) of 0.8 and the mechanical quality factor (Qms) of 5 further support these capabilities.

How is the moving mass of the Focal K2 Power SUB25KXS defined and why is it important?

The moving mass of the Focal K2 Power SUB25KXS is 180 g. This figure is fundamental for determining the efficiency and response speed of a Subwoofer in producing sound. An optimally balanced Mms contributes to quick response and minimizes distortion at high volumes. A managed mass directly affects the Q factors, allowing for specific control over the frequency response. In conjunction with the linear excursion (Xmax) of 14 mm, the Subwoofer is capable of generating remarkable air movements for deep pressure in mobile or stationary installations.

How does the compliance of the Focal K2 Power SUB25KXS affect its performance?

The compliance (Cms) of the SUB25KXS is specified at 0.12 mm/N, a value that describes the mobility of the diaphragm and suspension elements. High compliance means a more flexible diaphragm movement, causing the Subwoofer to move with less energy. This optimizes overall energy consumption and allows for smooth and precise bass reproduction, which is particularly beneficial for acoustically demanding tracks. In systems that require versatile bass reproduction, this parameter significantly contributes to the Subwoofer's ability to accurately reproduce varying musical styles.

What are the installation requirements for the Focal K2 Power SUB25KXS for vehicles?

The Focal K2 Power SUB25KXS is a 10-inch Subwoofer that focuses on its dimensions and specifications to ensure optimal installation. A precise installation requires a specific volume, which is indicated in the product description as an equivalent volume (Vas) of 18 liters. Make sure that the installation space provides at least this volume. When mounting, the resonance frequency value of 35 Hz should be considered to choose a suitable placement in the vehicle. In vehicles with limited space, the design of the enclosure can also be tuned to the mechanical quality (Qms) of 5 to achieve maximum sound.

Why is the force factor (Bxl) important for the Focal K2 Power SUB25KXS?

The force factor of 11.5 N/A in the Focal K2 Power SUB25KXS Subwoofer is crucial for the performance of the subwoofer. This value indicates the strength of the magnetic field generated by the voice coil, relating to the diaphragm movement. A high force factor means a stronger attraction between the voice coil and the magnet, which in turn ensures precise and controlled bass reproduction. This value directly correlates with energy-efficient performance, leading to superior definition in the bass range and enhancing the dynamic capability of the subwoofer to reproduce deep bass frequencies, even at high power input from the Amplifier.

What diaphragm area does the Focal K2 Power SUB25KXS offer and why is it significant?

With an effective diaphragm area (Sd) of 327 cm², the Focal K2 Power SUB25KXS provides a sufficiently large area to move air effectively and reproduce different frequencies accurately. A larger diaphragm area is a direct indicator of the ability to project low frequencies and generate more sound pressure overall. This is useful for environments where strong bass is desired without distortion. This specification, combined with other design elements such as butyl surround and K2 sandwich diaphragm, enhances overall performance, making this subwoofer particularly suitable for demanding audio applications.

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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