- 4.5 inch high temperature voice coil
- High Sound pressure level
- Very high power handling
- Introducing 186FIND, the powerhouse woofer designed for superior audio performance. With a staggering 3,600 watts of peak power and a 4.5" voice coil that can withstand temperatures exceeding 350°C, this woofer is
- built to impress. Featuring a new paper pulp mixed with glass fibers, high excursion surround, and an extra large spider, it delivers unparalleled longevity and bass. The motor system's high grade ferrite magnet creates a
- strong symmetrical flux field, while the extended space below the voice coil allows for maximum excursion. Get ready to be blown away by the 186FIND woofer.
General specs Nominal Diameter: 18 in. Rated Impedance: 8 Ohm Power handling AES Power: 1,800 Watts Program Power: 3,600 Watts Voice Coil Diameter: 4.5 in. Winding wire: Copper Former: kapton Winding height: 31.8 mm T/S Parameters Resonant frequency: 33 Hz Re: 5.5 ohm Qes: 0.36 Qms: 12.1 Qts: 0.35 Vas: 174.2 liters Sd: 1,256 cm2 Mms: 288 grams Bl: 30.2 Le: 1.51 mH Sensitivity: 96 dB Design details Surround Material: Fabric Cone material: Paper Spider: Conex Plate thickness: 15 mm Peak to peak linear cone Displacement 19 mm Overall diameter: 468 mm Bolt circle diameter: 442 mm Baffle cutout dia.: 423 mm Number of mounting holes: 8 Depth (flange to rear): 212 mm Net weight: 19.3 kg Ordering codes: 8 ohm version: 186FINDX8-552A Recone kits: Download: Spec download 2D drawing 3D model
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PRODUCT CODE: 186FINDX8-552A
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--- ENCLOSURE RECOMMENDATIONS ---
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ENCLOSURE RECOMMENDATIONS: 186FINDX8-552A
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Driver: 186FINDX8-552A (186FIND) — 18" Woofer
Key T/S: Fs=33.0Hz, Qts=0.35, Vas=174.2L, Sens=96.0dB
Power: AES 1800W / Cont 3600W / Peak 7200W
Xmax=8.40mm, Sd=1256.0cm², Bl=30.2T·m
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
PORT RECOMMENDATION: Slot port (full-width or L-shaped internal duct) — provides large cross-sectional area needed for high air displacement; reduces port noise at high SPL
a) High SPL
Net Volume: 135 liters
Tuning (Fb): 37 Hz
Est. -3dB: 34 Hz
HP Filter: 29 Hz (24dB/oct recommended)
Round Port: 125mm dia × 99mm long
Slot Port: 338mm W × 75mm H × 263mm L
Port Velocity: 20.2 m/s
Notes: Strong mid-bass impact, reduced cone excursion, maximum output
b) Balanced Response
Net Volume: 160 liters
Tuning (Fb): 33 Hz
Est. -3dB: 30 Hz
HP Filter: 23 Hz (24dB/oct recommended)
Round Port: 125mm dia × 120mm long
Slot Port: 338mm W × 75mm H × 305mm L
Port Velocity: 17.7 m/s
Notes: General-purpose PA/subwoofer, even response, good transient behavior
c) Extended Low Frequency
Net Volume: 190 liters
Tuning (Fb): 29 Hz
Est. -3dB: 25 Hz
HP Filter: 20 Hz (24dB/oct recommended)
Round Port: 125mm dia × 144mm long
Slot Port: 338mm W × 75mm H × 356mm L
Port Velocity: 15.4 m/s
Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 186FINDX8-552A is a 18-inch high-output woofer driver designed for professional subwoofer systems requiring high sensitivity (96 dB 1W/1m) and controlled low-frequency behavior. The motor and suspension are optimized to maintain consistent performance at high drive levels, with controlled excursion and reduced thermal compression during long-term operation.
In bass reflex enclosures, the driver performs best in net internal volumes of 135 to 190 liters, tuned between 29 and 37 Hz. This alignment provides a balanced combination of low-frequency extension, cone control around resonance, and efficient port loading. Lower tuning improves deep bass extension but increases excursion below tuning, requiring appropriate high-pass filtering. Higher tuning increases sensitivity and output in the upper bass region while improving mechanical control.
The driver is intended for use with high-power amplification (approx. 1800 W AES / 3600 W continuous) and DSP control. A high-pass filter in the range of 20–29 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 25–100 Hz, making it suitable for integration with mid-bass or full-range systems.
This design is particularly effective in single or multi-driver bass reflex systems used in touring, installation, and high-SPL applications, where consistent performance, durability, and output capability are critical.
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The 186FINDX8-552A is designed for high-output vented subwoofer systems where stability under heavy load and predictable low-frequency behavior are required. The motor and suspension are optimized to maintain consistent performance at high drive levels, with controlled excursion and reduced thermal compression during long-term operation.
In bass reflex enclosures, the driver performs best in net internal volumes of 140 to 180 liters, tuned between 32 and 36 Hz. This alignment provides a balanced combination of low-frequency extension, cone control around resonance, and efficient port loading. Lower tuning improves deep bass extension but increases excursion below tuning, requiring appropriate high-pass filtering. Higher tuning increases sensitivity and output in the upper bass region while improving mechanical control.
The driver is intended for use with high-power amplification and DSP control. A high-pass filter in the range of 28–35 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 30–100 Hz, making it suitable for integration with mid-bass or full-range systems.
This design is particularly effective in single or multi-driver bass reflex systems used in touring, installation, and high-SPL applications, where consistent performance, durability, and output capability are critical.
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