SB Acoustics SB12PFC25-4-COAX 4" Coaxial Midwoofer

SB ACOUSTICS | Coaxial subwoofer

SB Acoustics SB12PFC25-4-COAX 4" Coaxial Midwoofer

Name: SB Acoustics Acoustics mélysugárzó 4" | HQ AudioParts
Brand: SB Acoustics
SKU: SB12PFC25-4-COAX
Price: 21990.00 HUF
Availability: LimitedAvailability

SKU: SB12PFC25-4-COAX

101.6 mm 4 Ω

Achieve clear, full-range sound in a compact design with this 4-inch coaxial midwoofer, ideal for high-fidelity audio systems. It integrates a dedicated tweeter for seamless high-frequency reproduction. Key specifications include a total Q factor (Qts) of 0.33 and a maximum linear excursion (Xmax) of 5 mm.

21 990 Ft

(17 315 Ft + VAT)

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Technical data

Nominal diameter	101.6 mm
Impedance	4 Ω
Sensitivity (SPL at 1 m / 2.83 V)	87 dB
Power tolerance (max)	30 W
Resonance frequency (Fs)	58 Hz

Maximum linear deflection (Xmax)	5 mm
Total Q (Qts)	0.33
Electromagnetic Q (Qes)	0.36
Mechanical Q (Qms)	4.07
DC resistance (Re)	3.1 Ω
Voice coil inductance (L_e)	0.26 mH
BL product (BL)	3.8 T·m
The surface area of the cone (Sd)	45 cm²
Equivalent volume (Iron)	4.5307 l
Mechanical compliance of the suspension (Cms)	1.66 mm/N
Woofer type	DL300 Audio DAC
Voice coil diameter	25.4 mm
Subwoofer Series	SB Acoustics PFC Paper Series

The SB12PFC25-4-COAX 4" Coaxial Midwoofer from SB Acoustics delivers exceptional clarity and full-range performance in a remarkably compact footprint. This driver is engineered for discerning audiophiles and system builders who demand high-fidelity sound without sacrificing space. Its coaxial design integrates a dedicated tweeter directly into the centre of the woofer cone, ensuring seamless high-frequency reproduction and a coherent soundstage that is ideal for near-field monitoring, high-end car audio installations, or compact bookshelf speakers.

Technically, this 4-inch (101.6 mm) driver features a paper cone from the acclaimed PFC Paper series, known for its natural, uncoloured midrange. With a nominal impedance of 4 ohms and a sensitivity of 87 dB (1m/2.83V), it pairs well with moderate amplification. The total Q factor (Qts) of 0.33 indicates a well-damped response suitable for sealed enclosures, while the 5 mm linear excursion (Xmax) and 30 W maximum power handling allow for dynamic playback. A 25.4 mm voice coil and low inductance (Le: 0.26 mH) contribute to precise transient control. The resonance frequency (Fs) of 58 Hz and equivalent volume (Vas) of 4.53 litres provide clear guidance for enclosure design. Combining technical refinement with practical versatility, this coaxial midwoofer is a superb choice for achieving high-resolution sound in space-conscious systems.