Skytec SP800 - 8” (20 cm) 4 Ω speaker for woofer replacement

Skytec SP800 - 8” (20 cm) 4 Ω speaker for woofer replacement

The Skytec SP800 is an 8” (20 cm), 4 Ω woofer designed as a reliable replacement for PA speakers, installations and DIY projects. It features a rigid suspension to control cone movement, a vented magnet for better heat dissipation and a 38 mm (1.5”) voice coil capable of handling 100 W RMS and 200 W peak. With a sensitivity of 89 dB (1W/1m) and a frequency response of 65–4,000 Hz , it delivers defined bass and mid-bass in two-way systems. It is easily installed thanks to its spade (Faston) terminals and standard dimensions: 180 mm cutout diameter , 80 mm mounting depth and approximately 210 mm outer diameter (total depth 87 mm). Approximate weight of the unit: 1.5 kg .

Main features

• 8” (20 cm), 4 Ω : compatible with enclosures and amplifiers sized at 4 ohms.
• 100W RMS / 200W Peak : Sufficient performance for compact PA, monitors and installations.
• 38mm (1.5”) coil and vented magnet : better thermal management and reliability in continuous use.
• Sensitivity 89 dB (1W/1m) : good efficiency with moderate power.
• Response 65–4,000 Hz : Controlled bass and midrange for 2-way systems with dedicated driver/tweeter.
• Rigid suspension : greater cone control and less distortion at high levels.
• Spade terminals : quick and secure connection for replacements.
• Standard mounting dimensions : cut-out 180 mm, depth 80 mm, exterior ~210 mm.

Product benefits

• Direct and economical replacement for restoring 8” boxes without modifying the enclosure.
• Reliability thanks to the ventilated magneto assembly and robust suspension.
• Sound consisting of bass and mid-bass: vocals, rhythm guitar, keys and general reinforcement.
• Easy installation with Faston terminals and widely compatible dimensions.

Use cases

• Replacement of woofers in 8” passive boxes (PA, stage monitors, fixed installations).
• DIY two-way projects combining it with a tweeter or compression driver.
• Maintenance of rental parks and mobile DJ equipment.

Compatibility and installation

Verify that the system supports a 4 Ω load and that the cutout diameter (180 mm) and depth (80 mm) fit the enclosure. Ensure tightness between the chassis and the speaker, and use appropriate hardware. For two-way systems, maintain the existing filter/crossover or adjust the cutout if you modify the system design.

Frequently Asked Questions

• Can it be used as a dedicated subwoofer? No. Its usable response starts at 65 Hz , designed for two-way woofer function.
• Can I replace an 8 Ω speaker with this 4 Ω speaker? Not directly: that would change the overall impedance and the amplifier load. Only use it if the speaker is designed for 4 Ω.
• What is the weight of the magnet? Approximately 0.57 kg (ventilated ferrite).

Description for projects

8” (20 cm), 4 Ω woofer; 100 W RMS power (200 W peak); sensitivity 89 dB (1 W/1 m); response 65–4,000 Hz; 38 mm voice coil; vented ferrite magnet (~0.57 kg); spade terminals; outer diameter ~210 mm; cutout diameter 180 mm; mounting depth 80 mm (total depth 87 mm); speaker weight ~1.5 kg; black.