B&C Speakers 12HCX76

A Classic of Coaxial Design: The "Point Source" Solution at the Heart of Modern Loudspeakers

The B&C 12HCX76 follows the proud tradition of coaxial speakers dedicated to sound reinforcement: an acoustic source as point-like as possible, designed to offer more controlled directivity and better uniformity between the mid-bass and treble. This architecture is particularly appreciated when aiming for precise reproduction, consistent projection, and coherent off-axis listening, while maintaining a compact footprint. Within a performance-oriented coaxial range, this model stands out by combining a high-efficiency 12-inch woofer with a titanium diaphragm HF driver, all powered by neodymium to optimize the power-to-weight ratio.

For Which Speakers and Users?

This coaxial speaker targets speaker manufacturers, integrators, rental companies, and demanding DIY enthusiasts looking for a transducer capable of covering a wide useful bandwidth with a "pro" signature: sharp attack, dynamic range, and level stability. It is particularly suitable for passive point-source type speakers, compact stage monitors, small to medium-sized front-of-house systems, as well as fixed installations requiring controlled directivity. Thanks to its specified frequency response from 45 Hz to 18 kHz, it allows the design of a versatile speaker, with or without subwoofer reinforcement depending on the expected bass level and enclosure volume.

Coaxial Architecture, Materials, and Directivity: What Makes the Difference

12-inch Coaxial + 1.3-inch HF Driver: Coherence and Clarity

The coaxial principle aligns the acoustic centers of the woofer and tweeter on the same axis. The result: better temporal coherence, a more natural transition around the crossover region (depending on your filtering), and a clearer sound image, especially at short and medium distances. This approach is highly relevant for speakers where limiting directivity lobes and maintaining consistent behavior as the listener moves is desired.

Titanium Diaphragm HF Driver: Precision and Power Handling

The high-frequency section features a titanium diaphragm and high sensitivity (107 dB), which promotes definition, presence, and dynamic reserve. This efficiency also facilitates the tuning of passive crossovers or active processing, preserving headroom to balance HF levels with the woofer without unnecessarily pushing amplification.

Neodymium Magnet and Reliability-Oriented Design

The neodymium magnet helps reduce overall weight (5.2 kg) while maintaining a powerful motor, a valuable asset for portable speakers. Mechanically, the LF double-roll suspension is designed to withstand heavy use, while the exponential cone with waterproof treatment front and back aims to better resist demanding environments (humidity, changing conditions, intensive use).

Recommended Enclosure and Tuning: A Solid Base for Tight Bass

The manufacturer recommends a 50-liter enclosure tuned to 45 Hz. This information provides an excellent design basis for achieving clean and dynamic bass suitable for sound reinforcement. With a resonant frequency Fs (LF) of 42 Hz and a Qts of 0.19, the alignment typically favors impact and control, particularly relevant in a compact, efficiency-oriented enclosure.

Specified Directivity: 60 x 40 degrees

The coverage is specified as 60 x 40 degrees with a horn mounted in front of the driver. This information helps anticipate dispersion and adapt the speaker to its application: targeted projection, limiting unwanted reflections depending on the room, and better control of high-frequency energy.

Technical specifications

Rackable	No	Type	Speakers
Category	speaker

Model	B&C 12HCX76	Fs (LF)	42 Hz
Configuration	12 inches (31 cm) + 1.3 inches	Qts	0.19
Power	350 + 80 W AES	Xmax	4.0 mm
Impedance	8 + 8 ohms	LF Suspension	double-roll
LF Sensitivity	99 dB (1 W / 1 m)	Cone	exponential, waterproof treatment front and back
HF Sensitivity	107 dB (1 W / 1 m)	Recommended Volume	50 liters
Frequency Response	45 Hz - 18 kHz	Tuning Frequency	45 Hz
LF Voice Coil	3 inches (64 mm) copper wire	Coverage	60 x 40 degrees (with horn mounted in front of the driver)
HF Voice Coil	3 inches (64 mm)	Total Diameter	315 mm
HF Diaphragm	titanium	Height	168 mm
Magnet	neodymium	Weight	5.2 kg