B&C DE502 – Flagship 1-Inch Neodymium Titanium Compression Driver with 1.9 T Motor and Maximum Power
The B&C DE502 is the most powerful, most advanced conventional 1-inch compression driver B&C makes. With a neodymium magnet producing 1.9 T of flux density — the highest of any driver in B&C’s entire product catalogue — a titanium diaphragm with optimised geometry for lower distortion, a shorting copper cap for extended high-frequency response, and 50 W AES power handling that leads B&C’s 1-inch range by a significant margin, the B&C DE502 represents the engineering ceiling of what a 1-inch exit compression driver can deliver.
The B&C DE502 replaces the well-established DE500. B&C redesigned the titanium diaphragm with new geometry that significantly lowers distortion while improving the stability and reliability of the driver. The sonic signature and most specifications remain close to the DE500, but the distortion improvements represent a meaningful step forward in output quality — the B&C DE502 produces cleaner high-frequency output under load than its predecessor.
The 1 kHz – 18 kHz bandwidth and 1.5 kHz recommended crossover give the B&C DE502 the lowest crossover capability of any conventional dome 1-inch driver in B&C’s range. That 1.5 kHz crossover point lets the compression driver take over from the woofer earlier, handing directivity control to the horn at a lower frequency and producing more consistent coverage across the listening area. For system designers, a 1.5 kHz crossover from a 1-inch exit is a genuine design advantage that was previously only available from larger-exit compression drivers.
Available in 8 and 16 Ω with a dual bolt pattern, user-replaceable titanium diaphragm (part number MMD5028), and a button-on version option, the B&C DE502 provides the same system design flexibility as the DE14 platform while delivering substantially more power, wider bandwidth, and the neodymium motor that makes 1.9 T from a 1.4 kg package possible.
Design and Construction of the B&C DE502
The B&C DE502 uses a 44 mm (1.7-inch) aluminium voice coil driving a titanium diaphragm through a 1-inch exit throat. The 44 mm coil matches the DE160 as the largest in B&C’s 1-inch range, but the motor behind it is in a different class entirely. The neodymium magnet assembly produces 1.9 T of flux density — not just the highest of any compression driver in B&C’s HF range, but the highest of any driver in B&C’s entire product catalogue, surpassing even the 10NSM76 midrange at 1.6 T and the 10MD26 mid-bass at 1.45 T.
That 1.9 T flux density is the engineering foundation of the B&C DE502’s performance. The voice coil operates in the most concentrated magnetic field of any B&C driver, which produces the combination of 107 dB sensitivity and 50 W AES power handling that defines this driver’s capability. The neodymium magnet achieves this extreme flux from a compact, lightweight motor assembly — the B&C DE502 weighs just 1.4 kg, which is actually 300 g lighter than the ferrite-motored DE160 despite handling 25% more power. Neodymium delivers the flux, saves the weight, and enables the compact 51 mm depth.
The titanium diaphragm features new geometry compared to the DE500 it replaces. B&C’s stated goal was significantly lower distortion with improved stability and reliability — the diaphragm shape has been optimised to reduce the nonlinear behaviour that generates harmonic distortion at high SPL. Titanium’s stiffness-to-weight ratio maintains pistonic motion at higher frequencies, producing the detailed, forward treble character that defines professional titanium compression drivers — but the updated geometry means the B&C DE502 does it with measurably less distortion than its predecessor.
A shorting copper cap on the pole piece reduces voice coil inductance rise at higher frequencies, flattening the impedance curve and extending the usable high-frequency response. The 0.12 mH inductance is low, and the copper cap keeps it from rising significantly through the operating range — supporting smooth, predictable output up to 18 kHz and clean crossover behaviour in both passive and active designs.
The dual bolt pattern provides maximum horn compatibility: a 76 mm diameter pattern with two M6 holes at 180° and a 57 mm diameter pattern with three M6 holes at 120°. This matches the DE14/DE14TN mounting interface, making the B&C DE502 compatible with the widest range of 1-inch horns available. At 102 mm overall diameter and 51 mm depth, the body matches the DE160’s diameter but is 10 mm shallower — the neodymium motor’s compact depth is the reason.
Performance and Applications for the B&C DE502
The B&C DE502 delivers 107 dB sensitivity across a 1 kHz – 18 kHz bandwidth with a recommended crossover frequency of 1.5 kHz. The 1 kHz lower frequency limit is 200 Hz deeper than the DE36’s 1.2 kHz and 500 Hz deeper than the DE160/DE12TC/DE14 family’s 1.5 kHz. The 1.5 kHz recommended crossover is 300 Hz lower than the DE36’s 1.8 kHz and 500 Hz lower than the DE12TC/DE14’s 2.2 kHz — giving system designers more room to hand off from the woofer earlier and let the horn control directivity from a lower frequency.
The ability to cross over at 1.5 kHz from a 1-inch exit is the B&C DE502’s most significant system design advantage. In conventional two-way systems, the woofer beams progressively as frequency increases — its directivity narrows and the off-axis response degrades. Crossing over at 1.5 kHz instead of 2–2.5 kHz means the woofer operates in a narrower bandwidth where its directivity is more uniform, and the horn takes over control earlier where it can maintain consistent pattern control. The result is smoother power response, more consistent coverage, and better off-axis performance — the hallmarks of professional-grade system design.
The 50 W AES / 100 W program power handling is the highest of any 1-inch compression driver in B&C’s range. The 1.9 T neodymium motor and 44 mm coil provide the magnetic circuit and thermal capacity to sustain this power level reliably, and the updated titanium diaphragm geometry handles the mechanical stress of high-SPL operation with the improved stability B&C designed into the replacement. For touring rigs, installed sound systems, and any application where the compression driver operates at sustained high power for hours, the B&C DE502 provides headroom that no other B&C 1-inch can match.
The 107 dB sensitivity matches the DE160 and DE10, placing the B&C DE502 at the top of B&C’s 1-inch range on the metric that matters most: sustained output at sensitivity. The DE10 achieves 107 dB at 20 W. The DE160 achieves 107 dB at 40 W. The B&C DE502 achieves 107 dB at 50 W — same efficiency, same output per watt, but with the most thermal headroom for sustained operation.
The titanium diaphragm with the shorting copper cap gives the B&C DE502 a treble character that combines titanium’s detail and presence with a smoother, more extended top end than titanium without the cap would produce. The copper cap reduces the inductance-related rolloff that makes uncapped titanium drivers sound increasingly harsh as they approach their upper limit. The result is brighter and more detailed than Mylar, but more controlled and extended than uncapped titanium — the best of both worlds for systems where the HF section needs to deliver both presence and refinement.
Ideal applications for the B&C DE502 include:
- Premium two-way PA tops requiring maximum HF power handling and lowest crossover point
- Touring speaker systems where sustained high-power operation is standard
- Line arrays using the 16 Ω variant for multi-driver HF configurations
- Installed sound systems in venues, clubs, and performance spaces running extended hours
- Two-way systems crossing over at 1.5 kHz for improved pattern control and power response
- Upgrades from DE500 installations benefiting from the lower-distortion diaphragm geometry
- Cabinet designs requiring the 57 mm three-hole bolt pattern for horn compatibility
- Button-on horn systems using bayonet-style mounting
Specifications – B&C DE502
- Throat Diameter: 25 mm (1 in)
- Nominal Impedance: 8 Ω
- Minimum Impedance: 7.3 Ω
- Nominal Power Handling: 50 W
- Continuous Power Handling: 100 W
- Sensitivity: 107 dB
- Frequency Range: 1 kHz – 18 kHz
- Recommended Crossover: 1.5 kHz
- Voice Coil Diameter: 44 mm (1.7 in)
- Winding Material: Aluminium
- Inductance: 0.12 mH
- Flux Density: 1.9 T
- Magnet Material: Neodymium
- Diaphragm Material: Titanium
- Replacement Diaphragm: MMD5028
- Available Impedances: 8 Ω, 16 Ω
- Net Weight: 1.4 kg (3.1 lb)
Mounting Information – B&C DE502
- Overall Diameter: 102 mm (4 in)
- Depth: 51 mm (2 in)
- Bolt Pattern 1: Two M6 holes on 76 mm (3 in) bolt circle, 180° apart
- Bolt Pattern 2: Three M6 holes on 57 mm (2.2 in) bolt circle, 120° apart
- Note: Also available in button-on version
Conclusion – B&C DE502 Compression Driver
The B&C DE502 is the most capable 1-inch compression driver in B&C’s range. The 1.9 T neodymium motor is the most powerful magnetic circuit B&C puts in any driver — LF or HF — and it drives a titanium diaphragm with optimised low-distortion geometry through a 44 mm coil handling 50 W AES. Every specification either leads or matches the best in the 1-inch range: highest power (50 W AES), highest flux (1.9 T), widest bandwidth (1 kHz – 18 kHz), lowest recommended crossover (1.5 kHz), and the full complement of system design features — dual bolt pattern, 8/16 Ω, shorting copper cap, button-on option.
The upgrade from the DE500 is focused on distortion — the new diaphragm geometry delivers measurably cleaner output at high SPL while maintaining the sonic signature and reliability that made the DE500 a standard in the industry. For builders running DE500s, the B&C DE502 is a direct drop-in replacement with better measured performance.
For premium two-way PA systems, touring rigs, line arrays, installed sound, and any application where a 1-inch compression driver needs to deliver the absolute best combination of power handling, bandwidth, sensitivity, and output quality available in the format, the B&C DE502 is the 1-inch that sets the ceiling. The 1.9 T motor doesn’t leave room for argument — this is B&C’s best 1-inch, and it’s designed for builders who accept nothing less.
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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.
