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Focal K2 Power SUB25KXS 10" (25cm) Subwoofer
SKU:  SUB25KXS
EAN:  3544058820854

1 Review

350 Watt

K2 Power SUB25KXS

SKU:  SUB25KXS
EAN:  3544058820854

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
00 d
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€399,00
-20% €499,00 €399,00
5% discount with credit card
inkl. VAT , possibly plus shipping
Delivery
Jun 5, - Jun 8,
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K2 Power SUB25KXS by Focal Description

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

Focal K2 Power SUB25KXS Datasheet

Open datasheet

Frequently Asked Questions about K2 Power SUB25KXS

What is the rated power of the Focal K2 Power SUB25KXS?

The rated power of the Focal K2 Power SUB25KXS is 350 Watts RMS. This means that the Subwoofer is capable of continuously providing a power of 350 Watts. This is particularly important to ensure consistent and reliable sound reproduction, especially if you enjoy listening to music at high volumes. The maximum power is 700 Watts, which covers short-term power needs to reproduce sudden sound peaks without distortion. With a sensitivity of 84.5 dB (2.83/1m), the Subwoofer optimizes sound output even at low amplifier power.

What is the diaphragm of the K2 Power SUB25KXS made of?

The diaphragm of the K2 Power SUB25KXS is made from a K2 sandwich material. This construction leads to a lightweight yet robust structure, which is essential for responsive and precise sound reproduction. The use of different materials in the sandwich construction ensures an excellent balance between stiffness and minimal mass. Additionally, the butyl surround contributes to flexibility and durability, which is particularly advantageous under high power demands. This combination allows for detailed audio representation across a wide frequency spectrum.

What role does the voice coil diameter play in the K2 Power SUB25KXS?

The voice coil diameter of the K2 Power SUB25KXS is 45 mm (1 3/4"), which contributes to increased thermal capacity. A larger voice coil can dissipate more heat, which is beneficial under high loads. It also supports control over diaphragm movement, leading to better sound precision. The nominal impedance of 4Ω allows for flexible combinations with various amplifiers, which is highly valued in sound engineering. The uniform drive of the diaphragm results in clean sound reproduction, greatly enhancing the listening experience.

Which parameter indicates the low-frequency capability of the K2 Power SUB25KXS?

The low-frequency capability of the K2 Power SUB25KXS is determined by the Fs parameter, which is at 35Hz. A low Fs value indicates that the Subwoofer can effectively reproduce low frequencies. Another indicator is the F-3 value of 36Hz, which describes the frequency at which the sound pressure drops by 3dB. Together with the Vas value of 18L and a Qts of 0.8, this results in a Subwoofer that offers immense bass qualities, especially in small enclosures. Combined, this directly produces powerful and clean bass at surprisingly low frequencies.

What does the Qts value mean for the Focal K2 Power SUB25KXS?

The Qts value of a speaker, for the K2 Power SUB25KXS it is 0.8, is crucial for describing the overall quality of a Subwoofer. A Qts of 0.8 typically indicates a design suitable for both sealed and bass reflex systems. Combined with the Qes of 0.97 and the Qms of 5, it shows that the Subwoofer offers flexible installation options and works well in both compact and larger enclosures. The interplay of these parameters allows for precise tuning to achieve the desired characteristics of bass reproduction.

What aspects should be considered when installing the K2 Power SUB25KXS in a car?

When installing the K2 Power SUB25KXS in a car, it is important to pay attention to the dimensions and volume requirements of the chosen enclosure. The Subwoofer has a Vas value of 18L, indicating that it can be used in a relatively small enclosure. This is advantageous, especially in limited space situations, as is often the case in cars. Additionally, you should ensure that the nominal impedance of 4Ω is compatible with the rest of the system. The diaphragm movement and radiators must have enough space to optimally utilize the required 14mm Xmax.

What factors influence the maximum oscillation movements of the SUB25KXS?

The maximum oscillation movements of the SUB25KXS are determined by the Xmax value of 14mm. This technical parameter defines how far the diaphragm can be controlled in the linear range before distortion occurs. Additionally, the stiffness of the diaphragm and the surround are significant, as these components are directly related to the oscillation capability. The combined effect of the voice coil with a diameter of 45mm and a Bxl value of 11.5 N/A also plays a significant role in controlling the diaphragm movement to ensure precise audio reproduction.

How does sensitivity affect the performance of the K2 Power SUB25KXS?

The sensitivity of the K2 Power SUB25KXS is 84.5dB (2.83/1m). This specification describes how much sound pressure the Subwoofer can produce from one watt of electrical power. Higher sensitivity values mean that less amplifier power is needed to achieve high volume levels. This is particularly relevant when you are operating an audio system with limited amplifier power. The combination of sensitivity with the 350W RMS rated power optimizes bass reproduction, as powerful and clear bass can be produced even with low amplifier power. Thus, the Subwoofer is ideal for efficient audio systems.

What is the advantage of the butyl surround in the Focal K2 Power SUB25KXS?

The use of a butyl surround in the Focal K2 Power SUB25KXS is advantageous because it offers high resistance to environmental influences, such as UV radiation and temperature changes, which is particularly important in vehicles. Butyl is also known for its flexibility and durability, leading to exceptional diaphragm movement capability. Especially in high-performance audio components, the efficiency of the surround materials plays a crucial role. It supports the diaphragm's ability to vibrate without interference, ensuring accurate and powerful bass reproduction.

What is the significance of the Sd value in the K2 Power SUB25KXS and how does it affect the sound?

The Sd value, sound radiation area, is 327cm² for the K2 Power SUB25KXS. This parameter is crucial for determining the efficiency with which a Subwoofer radiates the generated sound pressure into the room. Larger Sd values typically allow for higher volume, as more air is moved with the same diaphragm excursion. A high Sd value combined with an optimal Xmax of 14mm enables this woofer to reproduce low frequencies at high sound pressure evenly and without distortion. This way, you benefit from powerful and distortion-free bass sounds at any volume.

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