ESB Audio - 8.6K3 CX 3-Way Passive Crossover

The ESB Audio 8.6K3 CX is a high-precision 3-way passive crossover network engineered for ESB’s elite 8000 Series component speakers. Featuring advanced tuning flexibility, it offers multiple slope and level options to achieve ideal tonal balance and phase coherence. Premium components—such as pure copper air-core inductors and metallized polypropylene capacitors—ensure low distortion, superior transient response, and exceptional musical transparency. The result is an audiophile-grade crossover built for reference-level accuracy and customizable system tuning.

• Model: 8.6K3 CX
• Type: 3-Way Passive Crossover Network
• System Compatibility: Designed for ESB 8000 Series component speaker systems
• Configuration:
 • High-pass section for tweeter
 • Band-pass section for midrange
 • Low-pass section for woofer

• Crossover Frequencies: Selectable via jumper adjustment for optimized tuning
• Crossover Slopes: 12 dB/octave and 18 dB/octave options (user-selectable)
• Power Handling:
 • Continuous (RMS): 200 W
 • Peak: 400 W
• Nominal Impedance: 4 Ω
• Attenuation Controls:
 • Tweeter level: 0 dB / -2 dB / -4 dB / -6 dB
 • Midrange level: 0 dB / -3 dB / -6 dB / -9 dB
• Phase & Slope Control: Adjustable jumpers for slope and polarity alignment between stages
• Internal Components:
 • Air-core inductors wound with 99.9% oxygen-free copper wire
 • High-tolerance polypropylene capacitors
 • Non-inductive aluminum resistors for accurate thermal dispersion
• Inputs / Outputs:
 • Gold-plated screw terminals (input, woofer, midrange, tweeter)
 • Compatible with bi-amp or single-amp wiring configurations
• Enclosure:
 • CNC-machined aluminum base with transparent acrylic cover
 • Ventilated structure for thermal stability and visual appeal
• Dimensions: 7.0″ (L) × 4.0″ (W) × 1.8″ (H)
• Weight: Approx. 1.6 lb (0.73 kg)