B&C 15PS100 – Reliable 15-Inch Subwoofer Driver for Cost-Effective Bass Builds

The B&C 15PS100 is the 15-inch member of B&C’s PS100 platform — a proven, practical subwoofer driver that delivers solid low-frequency performance without overcomplicating the build or the budget. With a 100 mm copper voice coil, 700 W AES power handling, 95 dB sensitivity, and a 35 Hz – 1500 Hz bandwidth, the B&C 15PS100 provides genuine sub-bass capability from a compact 15-inch frame that many builders overlook in favour of larger formats.

At 9.8 kg with a ferrite motor, this driver keeps weight and cost realistic — and a Qts of 0.43 gives you the kind of enclosure flexibility that makes it a practical choice for builders who want one driver to serve across multiple cabinet designs. Sealed, vented, or even band-pass — the B&C 15PS100 works in all three without needing aggressive EQ or exotic alignments to sound right.

For portable PA subs, compact DJ rigs, home builds, and budget-conscious live sound systems, the B&C 15PS100 is the workhorse 15-inch sub driver that delivers dependable performance and leaves budget in the build for everything else.

Design and Construction of the B&C 15PS100

The B&C 15PS100 uses a 100 mm (4-inch) copper voice coil wound on a glass fibre former. A 4-inch coil on a 15-inch driver is a generous choice — it gives the B&C 15PS100 a larger thermal mass and better power handling than most 15-inch competitors running 3-inch or 3.5-inch coils. The 21 mm winding depth operating in an 11 mm magnetic gap yields 8 mm of linear one-way excursion (Xmax) with an additional 6.5 mm of travel (Xvar) before mechanical limits.

The motor uses a ferrite magnet in a T-pole configuration, producing 1.05 T of flux density and a force factor (Bl) of 21.2 Tm. Copper winding is the deliberate choice here — denser and more conductive than aluminium, it provides better thermal transfer from the coil to the former and frame, helping the driver manage heat during sustained high-power use. The 21.2 Tm Bl driving a 160 g moving mass delivers well-controlled transient response across the operating range.

Suspension is handled by a double silicone spider with optimised compliance and a triple-roll surround. The radial cone profile is tuned for sub-bass duty rather than mid-range extension — a fundamentally different design intent from B&C’s exponential-cone woofers like the PLB76 and FW88 that prioritise upper-frequency bandwidth.

TWP waterproof treatment on both sides of the cone provides moisture resistance for outdoor gigs and less-than-ideal storage conditions. At 168 mm deep and 9.8 kg, the B&C 15PS100 fits comfortably into compact sub enclosures without adding excessive weight to the finished cabinet.

Performance and Applications for the B&C 15PS100

The B&C 15PS100 delivers 95 dB sensitivity and 1.35% reference efficiency across a 35 Hz – 1500 Hz bandwidth. The 35 Hz lower limit is the differentiator here — it’s meaningfully lower than B&C’s woofer-class 15s like the PLB76 (40 Hz) and the FW88 (49 Hz), confirming that the B&C 15PS100 is designed to reach down into genuine sub-bass territory where those wider-bandwidth drivers roll off.

The Thiele–Small parameters make the B&C 15PS100 one of the most flexible 15-inch sub drivers in the B&C range. A Qts of 0.43 and an EBP of 83 Hz place it right on the sealed/vented boundary — the same versatile alignment zone as the 18-inch PS100 models. You can run it sealed for tighter, more controlled bass in a smaller cabinet, or vented for extended low-frequency reach. B&C recommends a 120-litre (4.24 ft³) vented enclosure tuned to 35 Hz for the full vented alignment.

The 4-inch voice coil gives the B&C 15PS100 a genuine power handling advantage over most 15-inch drivers in this price class. 700 W AES and 1400 W continuous program power mean you can push this driver with a serious amplifier without worrying about thermal limits — the larger coil dissipates heat more effectively than the 3-inch and 3.5-inch coils found on competing designs.

Ideal applications for the B&C 15PS100 include:

• Compact vented subwoofer cabinets for portable PA and DJ systems
• Sealed sub enclosures where tighter bass response is preferred
• Budget-friendly DIY subwoofer builds for live sound and home audio
• Dual-driver sub configurations using 8 Ω parallel pairs
• Replacement driver for existing 15-inch sub cabinets needing a reliable 8 Ω transducer

Specifications – B&C 15PS100

• Nominal Diameter: 380 mm (15 in)
• Nominal Impedance: 8 Ω
• Minimum Impedance: 6.5 Ω
• Nominal Power Handling: 700 W
• Continuous Power Handling: 1400 W
• Sensitivity: 95 dB
• Frequency Range: 35 Hz – 1500 Hz
• Voice Coil Diameter: 100 mm (4 in)
• Winding Material: Copper
• Former Material: Glass Fibre
• Winding Depth: 21 mm (0.83 in)
• Magnetic Gap Depth: 11 mm (0.4 in)
• Flux Density: 1.05 T
• Magnet Material: Ferrite
• Cone Shape: Radial
• Cone Treatment: TWP Waterproof (both sides)
• Surround Shape: Triple Roll
• Spider: Double Silicone
• Pole Design: T-Pole
• Net Weight: 9.8 kg (21.6 lb)

Thiele–Small Parameters – B&C 15PS100

• Fs: 39 Hz
• Re: 5.2 Ω
• Qes: 0.47
• Qms: 6
• Qts: 0.43
• Vas: 103 dm³ (3.64 ft³)
• Sd: 855 cm² (132.5 in²)
• η0: 1.35%
• Xmax: 8 mm
• Xvar: 6.5 mm
• Mms: 160 g
• Bl: 21.2 Tm
• Le: 2 mH
• EBP: 83 Hz

Mounting Information – B&C 15PS100

• Overall Diameter: 393 mm (15.5 in)
• Bolt Circle Diameter: 374 mm (14.72 in)
• Baffle Cutout Diameter: 354 mm (13.9 in)
• Depth: 168 mm (6.6 in)
• Flange and Gasket Thickness: 16 mm (0.63 in)
• Air Volume Occupied by Driver: 6.3 dm³ (0.22 ft³)
• Recommended Enclosure Volume: 120 dm³ (4.24 ft³)
• Recommended Tuning Frequency: 35 Hz

Conclusion – B&C 15PS100 Subwoofer Driver

The B&C 15PS100 does what the PS100 platform has always done — delivers honest, dependable performance at a price point that makes builds accessible. The 4-inch copper voice coil gives it a genuine thermal advantage over most 15-inch drivers in this class, and the Qts of 0.43 provides the enclosure flexibility that builders need when designing across different applications.

Where B&C’s woofer-class 15s like the PLB76 and FW88 are optimised for mid-bass efficiency and upper-frequency bandwidth, the B&C 15PS100 reaches lower. The 35 Hz lower limit and 35 Hz recommended tuning frequency confirm this driver’s purpose — real sub-bass output from a 15-inch frame, delivered reliably and affordably.

For compact sub builds, portable PA rigs, dual-driver configurations, or anywhere you need a budget-friendly 15-inch sub that handles real power and reaches into the low end with confidence, the B&C 15PS100 is the straightforward choice. No frills, no gimmicks — just a well-built B&C driver that does its job gig after gig.

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About B&C Speakers S.r.L.

B&C Speakers products are built in Bagno a Ripoli (Florence), Italy., ensuring high quality products to suite your speaker building requirements. Their 10,500 square meter facility incorporates highly sophisticated automation and quality control. Over the years they become one of the world leaders in the Professional Audio market, a brand recognized everywhere as a premium product that offers excellent value to the consumer.