CX6F140F

The CX6F-140F is a high efficiency, (93dB 1watt / 1 meter) 6.5-inch coaxial speaker with very linear frequency response characteristics and high power handling capability. The mid-woofer utilizes REDCATT developed paper pulp cone that has proven its performance in many our successful designs. The HF section was designed around our most successful dome assembly as used in 140FCD. The mini waveguide is CNC machined from single piece of aluminum, given the whole assembly incredible precision. The combination of used materials with our state of the art quality production yields in well performing driver even in the most demanding extreme conditions.

Magnetic circuit design
REDCATT engineers have developed ferrite-neodymium based magnetic circuit, capable of delivering the highest level of performance in a small form factor. The combination of ferrite and neodymium delivers an excellent magnetic performance. The magnetic circuit design is optimized to generate the minimum amount of flux modulation, providing exceptional stability. Aluminum demodulation ring is assembled in the HF section.

The CX6F140FX8X8-361C is a 6.5-inch / 1.4-inch coaxial driver featuring a single
shared hybrid ferrite-neodymium magnetic circuit serving both the LF woofer and HF
dome simultaneously. The LF section uses a 44.5mm voice coil on a glass fiber former
- providing high thermal conductivity for the 100W AES / 200W continuous power rating -
wound into REDCATT's custom paper pulp cone with a woven fabric surround and Nomex
spider. The HF section uses a 35.6mm CCAR voice coil on a Kapton former driving a PEN
dome with a matching PEN surround; a CNC-machined single-piece aluminum waveguide loads
the dome and controls the HF dispersion pattern, enabling operation from approximately
1,500 Hz. An aluminum demodulation ring in the HF magnetic circuit reduces Le non-linearity
and associated intermodulation distortion. The combined magnetic circuit is optimized to
minimize flux modulation across the full excursion range of the LF woofer while maintaining
stable magnetic bias for the HF dome - a design constraint unique to coaxial transducers
with shared magnetic structures. The steel basket provides dual-gasket front and rear
mounting with 8 bolt positions, supporting secure installation in demanding live PA
environments.

LF section T/S parameters: Fs = 121 Hz, Re = 5.4 ohm, Qes = 0.52, Qms = 4.73, Qts = 0.47,
Vas = 4.4 L, Sd = 141 cm2, Mms = 10.9 g, Bl = 9.27 T.m, Le = 0.45 mH, Xmax = 2.0 mm
(one-way), Vd = 28.2 cm3. The LF Vd of 28.2 cm3 is the largest of all REDCATT drivers
processed. The 1W/1m LF sensitivity (Lm) is 93.8 dB, consistent with the 2.83V/1m
measurement (95.5 dB) to within 0.01 dB for the 8 ohm nominal impedance. Maximum LF SPL
is 113.8 dB at 1 m (100W AES). HF parameters: Fs_HF = 1,000 Hz, Re_HF = 5.5 ohm,
Lm_HF = 101.0 dB (1W/1m, with waveguide loading), AES = 30W, maximum HF SPL = 115.8 dB.
The HF section is 7.2 dB more sensitive than the LF section at 1W/1m; an attenuator
or DSP gain trim is required in all crossover configurations. LF inductance rolloff onset:
f_Le = 1,911 Hz (addressed by crossover at 1.5-2.0 kHz). LF cone beaming onset: f_beam =
1,635 Hz - the crossover should be at or below 1.6 kHz for optimal LF-HF pattern
continuity. LF Zobel: 5.4 ohm + 15.4 uF. Column array coherence limit: f_array = 1.04 kHz
(165.2 mm OD) - above this frequency, the HF tweeter array governs vertical directivity.

Recommended crossover: 1,500-2,000 Hz (Linkwitz-Riley 24 dB/octave or equivalent);
phase alignment between LF and HF acoustic centres required in active/DSP systems.

The CX6F140FX8X8-361C is suited for professional PA column speaker systems where a
single coaxial driver provides both LF woofer and HF tweeter function in each driver bay,
eliminating the geometric separation artifacts of separate LF and HF transducers while
achieving 113.8 dB maximum LF SPL and 115.8 dB HF SPL (matched to 113.8 dB system
SPL after level alignment); 2-way active or passive loudspeaker designs for studio
monitoring, hi-fi, and installed sound where the shared hybrid magnetic circuit, precise
CNC waveguide, and dual-gasket front/rear mounting simplify cabinet geometry and installation;
near-field monitors and desktop reference systems in sealed configurations (0.80-3.49 L)
where a subwoofer handles content below 180-230 Hz; and demanding live PA and installed
sound environments where the glass fiber former, PEN dome, aluminum demodulation ring,
and extensively coated basket components provide performance under sustained high-power
drive.