ESB Audio - 3.65 2.5”/65 mm Cone Widerange

The ESB 3.65 Wide-Range Driver is engineered to span both midrange and high frequencies, allowing use as a compact full-range or mid/high unit in constrained spaces. With its light but stiff cone, efficient motor, and wide frequency coverage, it offers musical response and integrated performance in minimalist speaker systems or custom audio designs.

Specifications / Features:
• Model: 3.65
• Type: 2.5″ (65 mm) Wide-Range Cone Driver
• Nominal Impedance: 4 Ω
• RMS Power Handling: 50 W
• Peak / Transient Power Handling: 100 W
• Frequency Response: ~150 Hz – 20,000 Hz
• Sensitivity: ~88–90 dB @ 2.83 V / 1 m

Construction / Design:
• Cone Material: Light, stiff composite or treated paper designed for extended bandwidth
• Surround: Rubber surround for stable excursion and low distortion
• Voice Coil: Aluminum former with copper winding
• Spider / Suspension: Progressive spider design for linear movement control
• Basket / Frame: Die-cast aluminum or reinforced frame to maintain rigidity
• Magnet System: Compact ferrite or neodymium motor for efficient magnetic flux
• Venting / Cooling: Rear venting to improve heat dissipation
• Terminals: Gold-plated connectors for reliable signal transfer

Mechanical / Mounting Specs (Approx):
• Overall Diameter: ~2.9″ (74 mm)
• Mounting Depth: ~1.5″ (38 mm)
• Cut-out Diameter: ~2.5″ (65 mm)
• Weight: ~0.8 lb (0.36 kg)