B&C Speakers 6HCX51

A B&C Coaxial Designed for Compact and Efficient Speakers

The B&C 6HCX51 fits within the approach of coaxial speakers focused on compactness and diffusion coherence : the LF transducer and HF driver share the same axis, which promotes a more homogeneous reproduction at short and medium distances. Its design with a neodymium magnet and controlled dimensions (total diameter 187 mm) make it a natural candidate for speaker projects where every liter counts, without sacrificing a true high-frequency section.

Who and What Uses Make the B&C 6HCX51 Stand Out?

This coaxial speaker is particularly suitable if you want to build or maintain compact speakers with precise rendering: small "point source" heads, discreet stage monitors, satellites in a system with subwoofer, or installed speakers requiring clear directivity. With a stated frequency response of 90 Hz to 18 kHz, it is primarily intended for configurations where low-end performance is handled by a subwoofer or in highly optimized volumes. Thanks to its separate impedances (8 + 8 Ohms), it suits integrators and DIY manufacturers who want to independently manage the woofer/midrange and tweeter (passive or active crossover depending on the project).

Design and Key Points: Efficiency, Power Handling, and Integration

A Coherent LF/HF Assembly Designed for Clarity

The 6HCX51 combines an LF speaker with a 3-inch (64 mm) voice coil and an HF section featuring a 3-inch (64 mm) voice coil and a polyester diaphragm. This architecture aims for stable behavior at sustained levels and detailed attack reproduction (vocals, snare, guitars), while maintaining the typical timbre continuity of coaxial solutions when properly crossed over.

Efficiency and Level Balance

The stated sensitivities (92 dB LF and 105 dB HF at 1 W/1 m) indicate a very efficient high-frequency section. In speaker design, this helps achieve a present and clean treble but also requires careful filtering and level alignment to preserve a natural balance. This profile is appreciated in compact systems: definition is maintained without needing to push HF amplification.

Mechanical Behavior and Recommended Enclosure

The LF section features a dual roll surround, a 5.0 mm Xmax, and an exponential cone, elements that contribute to control and durability when the speaker is driven hard. The manufacturer specifies a recommended enclosure volume of 4 liters with a tuning at 90 Hz : valuable information for aiming at a compact volume and realistic tuning, consistent with the Fs (LF) at 90 Hz. In a satellite + subwoofer approach, this type of tuning facilitates a clean transition to the bass with appropriate crossover filtering.

Directivity: Diffusion Designed for "Clean" Listening

The 70 deg coverage announced (with horn mounted in front of the driver) helps concentrate useful energy toward the listening area and limit unwanted reflections depending on placement. This is a real advantage for speakers close to the audience, monitors, or installations where high intelligibility is sought.

Technical specifications