5.25-Inch Jumbo Magnet Subwoofer – 4 Ohm, 70W RMS / 500W Peak (FRD5.4J)

The FRD5.4J is Fredo's flagship 5.25-inch subwoofer, built around an oversized 120mm Y30 ferrite magnet — significantly larger than standard 90mm units. With a 9.54 T·m motor, 30 Hz resonance frequency, and bass dispersion up to 25 feet, it's engineered for serious bookshelf, home theatre, and car audio applications. The bright red chassis and orange polypropylene cone make it as striking to look at as it is to hear.

Key Specs

• Impedance: 4 Ohm | RMS: 70W | Peak: 500W
• Fs: 30 Hz | Qts: 0.42 | BL: 9.54 T·m
• SPL: 90 dB (2.83V @ 1m) | Bass Dispersion: up to 25 ft
• Voice Coil: 41mm, 4-layer copper, 36 gauge, 31.75mm Kapton former
• Magnet: Y30 oversize ferrite, 120mm OD × 20mm
• Chassis: Stamped CR steel, bright red powder coat
• Cone: Orange polypropylene (PP) | Dust Cap: Rubber
• Weight: 1.85 kg | Dimensions: 15.5cm dia × 8cm H

Recommended Setup

• Installation: Inverted (diaphragm into box, chassis out)
• Amp: 70W RMS DJ amp or TPA3116 (min 60W)
• Enclosure: 5.8L L-Port box

Warranty

1 year / 7-day replacement