Complementing their DCX464 coaxial compression driver, referred by B&C as the "the most accurate point source solution available", the Italian manufacturer has announced the FB464 passive crossover designed for use in conjunction with the ME464 300Hz horn released in late 2020 to yield a flat response out of the box using OEM components (schematic is shown below).
The FB464 crossover phase aligns the mid and high frequency elements of the DCX464, and implements an asymmetrical slope crossover (18 dB/oct lowpass for the mids and 12 dB/oct highpass for the HF) at 3.6kHz, reportedly without reducing efficiency. (Individual and combined frequency responses are show below).
"This crossover frequency best balances energy between the two diaphragms for minimum distortion at all output levels. Series protection is additionally provided by three industrial filament bulbs which prevent over power or inconsistent tonal balance at very high output", says the company.
The FB464 is available in both 8Ω and 16Ω versions to match the impedance of the DCX464 driver. Find specifications, drawings, and measurements on the brand's new dedicated crossovers website section: https://www.bcspeakers.com/en/products/crossovers