- Optimized ferrite magnetic structure
- Lightweight, yet strong paper cone
- Hi spl
- 183FIND is a cost-effective solution for subwoofers. Its lightweight yet strong cone allows the magnetic circuit to be size optimized while delivering a seizable amount of sound pressure. With its high efficiency (97 dB 1watt / 1 meter) and high power handling capabilities, this woofer will excel in all applications with tight budgets. The cone
- shape and material was developed to provide an optimum low-frequency response, making the woofer good choice for subwoofer systems. Power HandlingAt the core of the 183FIND is its voice coil technology featuring a composite Polyimide former material capable of withstanding peak temperatures above 280°C. The
- winding with high-temperature specification copper wire ensures the long life of the voice coil, without the costly service cycles. The cone is also extensively treated to withstand harsh environments and high humidity. Metal parts in the speaker assembly are coated for extreme weatherization protection.
General specs Nominal Diameter: 18 in. Rated Impedance: 8 Ohm Power handling AES Power: 600 Watts Program Power: 1,200 Watts Voice Coil Diameter: 3 in. Winding wire: Copper Former: kapton Winding height: 19.8 mm T/S Parameters Resonant frequency: 32 Hz Re: 5.9 ohm Qes: 0.43 Qms: 13.2 Qts: 0.42 Vas: 329.5 liters Sd: 1,225.4 cm2 Mms: 165 grams Bl: 21.14 Le: 0.73 mH Sensitivity: 97.07 dB Design details Surround Material: Fabric Cone material: Paper Spider: ET-0527 Plate thickness: 8 mm Peak to peak linear cone Displacement n/a mm Overall diameter: 461 mm Bolt circle diameter: 442 mm Baffle cutout dia.: 422 mm Number of mounting holes: 8 Depth (flange to rear): 184 mm Net weight: 8.8 kg Ordering codes: 8 ohm version: 183FINDX8-297 Recone kits: Download: Spec download 2D drawing 3D model
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PRODUCT CODE: 183FINDX8-297
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--- ENCLOSURE RECOMMENDATIONS ---
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ENCLOSURE RECOMMENDATIONS: 183FINDX8-297
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Driver: 183FINDX8-297 (183FIND) — 18" Mid-Woofer
Key T/S: Fs=32.0Hz, Qts=0.42, Vas=329.5L, Sens=97.07dB
Power: AES 600W / Cont 1200W / Peak 2400W
Xmax=5.90mm, Sd=1225.4cm², Bl=21.14T·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: 215 liters
Tuning (Fb): 37 Hz
Est. -3dB: 34 Hz
HP Filter: 29 Hz (24dB/oct recommended)
Round Port: 125mm dia × 35mm long
Slot Port: 338mm W × 75mm H × 130mm L
Port Velocity: 13.6 m/s
Notes: Strong mid-bass impact, reduced cone excursion, maximum output
b) Balanced Response
Net Volume: 250 liters
Tuning (Fb): 34 Hz
Est. -3dB: 31 Hz
HP Filter: 24 Hz (24dB/oct recommended)
Round Port: 125mm dia × 38mm long
Slot Port: 338mm W × 75mm H × 136mm L
Port Velocity: 12.4 m/s
Notes: General-purpose PA/subwoofer, even response, good transient behavior
c) Extended Low Frequency
Net Volume: 275 liters
Tuning (Fb): 30 Hz
Est. -3dB: 26 Hz
HP Filter: 20 Hz (24dB/oct recommended)
Round Port: 125mm dia × 52mm long
Slot Port: 338mm W × 75mm H × 166mm L
Port Velocity: 11.3 m/s
Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 183FINDX8-297 is a 18-inch high-output mid-woofer driver designed for professional 2-way and multi-way systems requiring high sensitivity (97 dB 1W/1m) and controlled low-frequency behavior. The driver uses a balanced motor-suspension design that provides good cone control while maintaining usable output across its operating bandwidth.
In bass reflex enclosures, the driver performs best in net internal volumes of 215 to 275 liters, tuned between 30 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. Note: these enclosures are sizable for a 18-inch driver, a result of the driver's high acoustic compliance (Vas=329.5L). More compact cabinets can be designed — smaller net volumes are achievable with active DSP correction, accepting some reduction in output and sensitivity below the tuning frequency.
The driver is intended for use with high-power amplification (approx. 600 W AES / 1200 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 26–1500 Hz, covering bass through upper-mid frequencies for direct integration with a compression driver or tweeter in a two-way or multi-way system.
This design is particularly effective in single or multi-driver bass reflex systems used in professional two-way and multi-way PA systems, powered monitors, and compact bass-reflex enclosures, where extended bandwidth, controlled distortion across the full operating range, and versatile system integration are required.
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