18" | 18FIND
Ferrite Woofer
Key features:
- EXTENDED FREQUENCY RESPONSE
- OPTIMIZED VENTING SYSTEM
- HIGH POWER HANDLING
Design notes:
The 18FIND is a high efficiency, (97 dB 1watt / 1 meter) 18-inch woofer with incredibly linear frequency response characteristics, high power handling capability while generating low harmonic distortion artifacts. The 18FIND uses a lightweight glass fiber loaded cone assembly along with a high excursion triple roll constant geometry surround. This combination provides remarkable strength, high efficiency and a peak to peak maximum excursion of 30mm. Power HandlingAt the core of the 18FIND is it’s voice coil technology featuring a composite Polyimide former material capable of withstanding peak temperatures in excess of 250C, well beyond the thermal requirements of modern professional audio systems. REDCATT has implemented a silicone spider design to ensure long term shape memory, consistency and diminish anomalies associated with spider deterioration.
Specifications:
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General specs |
Nominal Diameter: |
18 in. |
Rated Impedance: |
8 Ohm |
Power handling |
AES Power: |
1,000 Watts |
Program Power: |
2,000 Watts |
Voice Coil |
Diameter: |
4 in. |
Winding wire: |
Copper |
Former: |
kapton |
Winding height: |
23.7 mm |
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T/S Parameters |
Resonant frequency: |
36 Hz |
Re: |
5.2 ohm |
Qes: |
0.44 |
Qms: |
8.4 |
Qts: |
0.42 |
Vas: |
203.4 liters |
Sd: |
1,257 cm2 |
Mms: |
211.8 grams |
Bl: |
23.6 |
Le: |
1.74 mH |
Sensitivity: |
97.24 dB |
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Design details |
Surround Material: |
Fabric |
Cone material: |
Paper |
Spider: |
Nomex |
Plate thickness: |
12 mm |
Peak to peak linear cone Displacement |
10.4 mm |
Overall diameter: |
468 mm |
Bolt circle diameter: |
442 mm |
Baffle cutout dia.: |
426 mm |
Number of mounting holes: |
8 |
Depth (flange to rear): |
184 mm |
Net weight: |
13.7 kg |
Ordering codes: |
4 ohm version: |
n/a |
8 ohm version: |
18FINDX8-036 |
16 ohm version: |
n/a |
Recone kits: |
4 ohm version: |
n/a |
8 ohm version: |
RC18FINDX8-036 |
16 ohm version: |
n/a |
Frequency response & lmpedance
2D drawing