SP-15X TiTANiUM . 8000 WATT RMS (PRICE UNIT)
General Specifications
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Model: SP-15X TITANIUM
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Brand: SP AUDIO (Italian Design)
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Description: Extreme Competition 15" (38 cm) Subwoofer for SPL & Extreme Low-Frequency Applications
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Subwoofer Size: 15" / 38 cm
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Power Handling: 8000 Watt RMS / 16000 Watt Max
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Net Monster Weight: 56 kg / 123.5 lbs
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Voice Coil: 5" / 125 mm, 4-Layer CCAW Coil
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BL Force Factor: 26.75 Tm
Mounting & Dimension Guide
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Mounting Cutout Diameter (A): 353 mm (13.90 inches)
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Screw Pitch Circle Diameter (PCD): ~370 mm (14.57 inches)
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Total Height (C): ~260 mm (10.24 inches)
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Mounting Depth (D): ~255 mm (10.04 inches)
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Motor Diameter (F): 280 mm (11.02 inches)
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Motor Depth (E): ~155 mm (6.10 inches)
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Mounting Hardware: 8x Mounting Screws (M8)
Thiele-Small (T/S) Parameters
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Fs: 36.70 Hz
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Bl: 26.75 Tm
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Qms: 3.341
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Qes: 0.595
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Qts: 0.505
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Vas: 31.98 L
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Mms: 595.96 g
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Sd: 844.9 cm²
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Cms: 31.55 μM/N
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SPLo: 87.1 dB (1W/1m)
Components & Materials
| Component | Engineering Dimensions / Value | Material & Finishing Details |
| Washer (Top Plate) |
OD 280 mm x ID 133.5 mm x H 35 mm |
High-permeability steel with premium Chrome Plating |
| T-Yoke & Pole Piece |
Base 280x20 mm, Pole OD 122.5 x H 168 mm |
Solid forged low-carbon steel with premium Chrome Plating |
| Voice Coil |
ID 125 mm, OD 133 mm / DCR 1.8 + 1.8 Ω |
4-Layer CCAW Former H 155 mm Winding H 65 mm |
| Spider Pack |
OD 250 mm (10-Inch Diameter) |
6-Layer Nomex progressive spider with heavy lead wires |
| Cone Assembly |
15-Inch Effective Diameter |
Pure Carbon Fiber Cone with Ribbed High-Roll Surround |
| Dust Cap |
Full-Cover Structural Cap |
3D Woven Carbon Fiber dust cap |
| Basket Frame |
Antitorsion Custom Die-Cast |
Die-cast Aluminum with custom finish |
| Magnet Structure |
OD 280 mm, 4x 25 mm Rings |
Quad-Stack Y35 High-Energy Ferrite |
| Net Weight |
56.0 kg (123.5 lbs) |
Net driver weight (Excluding shipping box) |
| Gross Weight |
59.0 kg (130.0 lbs) |
Total weight in reinforced crate |
Enclosure Design & Tuning (Bass-Reflex / Ported Box)
European Specs (Metric)
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Net Internal Volume: 110 Liters
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Port Area: 320 cm²
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Port Length: 60 cm
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Tuning Frequency (Fb): 34 Hz
American Specs (Imperial)
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Net Internal Volume: 3.88 cu. ft.
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Port Area: 49.6 sq. in.
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Port Length: 23.6 Inches
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Tuning Frequency (Fb): 34 Hz
Professional Installation & Handling Pro-Tips
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Extreme Weight Handling: A 2-technician installation is required due to the 56 kg weight.
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Wood Thickness & Bracing: Use a minimum of 25mm (1") Birch Ply or MDF.
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Structural Support: Mandatory internal bracing is required.
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Baffle Requirements: Use a double or triple baffle setup (50mm+ / 2"+).
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Mounting Hardware: Use M8 or M10 machine screws along with T-nuts for securing the subwoofer.
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Break-in Period: A mandatory 20+ hour break-in period at moderate volume is required.