Skytec SP1500 - 15” (38 cm) 4 Ω speaker for woofer replacement

Skytec SP1500 - 15” (38 cm) 4 Ω speaker for woofer replacement

The Skytec SP1500 is a 15” (38 cm), 4 Ω woofer designed as a direct replacement for PA, mobile sound and installation speakers. Its design combines a rigid suspension for better cone control, a vented ferrite magnet for improved heat dissipation and a 50 mm (2”) voice coil . With 300 W nominal power and 600 W max. it delivers sustained power and reliability. The data sheet confirms a sensitivity of 98 dB (1W/1m) and a frequency response of 40–3,500 Hz , making it suitable as a woofer/mid-woofer in 2-way systems. It is quickly installed using spade terminals (Faston) and comes with standard dimensions: cut-out diameter 370 mm , mounting depth 130 mm and dimensions approx. 386 × 153 mm . Approximate weight: 4.7 kg .

Main features

• 15” (38 cm), 4 Ω : Replacement compatible with enclosures and power amps configured at 4 ohms.
• 300W nominal / 600W max : dynamic range for compact PA, stage monitors and installations.
• 50mm (2”) coil and vented magnet : better thermal management and stability in continuous use.
• Sensitivity 98 dB (1W/1m) : effective performance at moderate power.
• Response 40–3,500 Hz : Controlled bass and mid-bass for 2-way systems with dedicated driver/tweeter.
• Rigid suspension : cone displacement control and lower distortion at high SPL.
• Spade terminals (Faston) for quick and secure connection.
• Standard mounting dimensions : cut-out 370 mm, depth 130 mm, external dimensions approx. 386 × 153 mm.

Product benefits

• Direct and economical replacement for restoring 15” cabinets without modifying the speaker.
• Reliability on tours, rentals, and installations thanks to the 2” voice coil and vented magnet.
• Consistent sound in the bass/mid-bass range: vocals, supporting electric bass, keyboards and general reinforcement.
• Hassle-free installation with Faston terminals and standard hardware.

Use cases

• Replacement of woofers in 15” passive PA and stage monitor enclosures.
• DIY two-way projects combining it with a compression driver or tweeter.
• Maintenance of rental parks and mobile DJ equipment.

Compatibility and installation

Before mounting, confirm that your system supports 4 ohms and that the cutout diameter (370 mm) and mounting depth (130 mm) fit the enclosure. Apply gasket or seal between the chassis and the speaker to ensure a watertight seal and use appropriate hardware. In two-way systems, keep the manufacturer's original crossover or adjust the crossover frequency if the system design changes.

Frequently Asked Questions

• Can it be used as a dedicated subwoofer? No. Its usable range starts at ~ 40 Hz ; it's intended as a bass/mid-bass woofer in two-way systems.
• Can I replace an 8 Ω speaker with this 4 Ω speaker? Not directly: that would alter the overall impedance and load of the amplifier. Use it only if the speaker is designed for 4 Ω .
• What type of magnet does it incorporate? Ventilated ferrite , with 50 oz of magnetic mass.

Description for projects

15” (38 cm), 4 Ω woofer; 300 W nominal power (600 W max); sensitivity 98 dB (1 W/1 m); response 40–3,500 Hz; 50 mm (2”) voice coil; vented ferrite magnet (50 oz); spade terminals; 370 mm cutout diameter; 130 mm mounting depth; dimensions approx. 386 × 153 mm; weight ~4.7 kg; black finish.