The ESB 3.69C is a versatile 6×9-inch convertible speaker designed for both coaxial convenience and component-grade performance. It enables a clean upgrade path: use it as a coaxial in doors or trunks, or convert it into a proper 2-way system by relocating the tweeter. With premium materials—treated paper cone, reinforced frame, silk dome tweeter—and a clever phase plug design when converted, it offers flexibility without sacrificing sound quality.
Specifications / Features:
• Model: 3.69C
• Type: 2-Way Convertible Coaxial / Component System
• Woofer / Midrange: 6″ × 9″ (150 × 230 mm) ferrite-magnet driver
• Tweeter: 1″ (25 mm) silk-dome tweeter, removable / reconfigurable for component use
• Nominal Impedance: 4 Ω
• RMS Power Handling: 80 W
• Peak Power Handling: 160 W
• Frequency Response: 55 Hz – 22,000 Hz
• Sensitivity: 91.5 dB @ 2.83 V / 1 m
Convertible Design:
• The system can function as a coaxial or be converted to a 2-way component arrangement by removing the coax tweeter mount and mounting the tweeter separately
• The woofer is adapted so that when the coax tweeter is removed, an ABS phase plug replaces it to maintain acoustic continuity in the midrange
• This design preserves linear response in both coaxial and separated component mode
Driver / Construction Features:
• Woofer cone: Treated paper cone (water-resistant coating)
• Surround: Rubber surround for linear motion and durability
• Voice Coil: Aluminum former with copper winding and vented magnetic design
• Basket / Frame: ABS reinforced with fiberglass for rigidity and minimal resonance
• Tweeter dome: Silk dome, polymer composite damping
• Tweeter magnet: Neodymium for compact, effective magnetic drive
• Cooling: Venting under tweeter mount and rear of woofer for heat dissipation
Mechanical / Mounting Specs (Approx):
• Overall Speaker Dimensions (frame): ~150 × 230 mm
• Mounting Depth: ~64 mm
• Cut-Out / Mounting Hole (Woofer): ~145 mm × 225 mm
• Tweeter Mounting: Standard 1″ flange / ring
