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By Pro-Logic Technologies
When a subwoofer fails, you notice immediately. The weight, the impact, and the physical presence of bass disappear from the audio experience, leaving music sounding thin and home cinema soundtracks stripped of their visceral power. Subwoofers are mechanically and electronically complex — they contain a high-excursion driver, a dedicated amplifier module, and often sophisticated digital signal processing and wireless connectivity features. When any of these components fails, Pro-Logic Technologies is ready to diagnose and repair it in Nairobi.
Common Subwoofer Faults
No bass output from a powered subwoofer is the most common reported fault. Powered subwoofers (the overwhelming majority of consumer subwoofers sold today) contain a self-contained amplifier module that can fail independently of the driver. Common causes of amplifier module failure include failed power supply capacitors, failed output transistors, overheating damage caused by sustained high-volume use, and power surge damage. Pro-Logic Technologies diagnoses and repairs subwoofer amplifier modules at component level, or sources replacement modules for popular models where component-level repair is not economical.
Distorted or rattling bass typically indicates mechanical damage to the driver — a torn or delaminated surround (the flexible roll of material that connects the outer edge of the driver cone to the frame), a damaged spider (the inner suspension), or a voice coil that has shifted from its centred position in the magnetic gap. We assess driver damage and carry out surround replacement, re-coning, or full driver replacement as appropriate.
Hum or buzzing from the subwoofer is most commonly caused by a ground loop — an electrical potential difference between the subwoofer and other components in the system — or by a failing power supply capacitor in the amplifier module. We diagnose the specific cause and apply the appropriate solution.
Wireless connectivity failure — in subwoofers that pair wirelessly with a soundbar or AV receiver, loss of the wireless link is a common fault. We replace wireless modules and reconfigure pairing as required.
Port noise and rattle — in ported subwoofers, the port tube or its securing points can loosen over time, causing resonance and rattling at high output levels. We inspect and resecure internal components and repair port assemblies as needed.
Driver Replacement and Re-Coning
Where the subwoofer driver has sustained physical damage, Pro-Logic Technologies can carry out surround replacement or full re-coning — a process in which the cone, surround, spider, voice coil former, and voice coil are all replaced as an assembly, giving the driver a second life at a fraction of the cost of a new subwoofer.
We source replacement drivers from reputable suppliers and, where original specification replacements are unavailable, recommend equivalent-specification alternatives that maintain the acoustic character of the subwoofer cabinet design.
Brands We Repair
We repair subwoofers from all major brands including REL, SVS, BK Electronics, Velodyne, Polk Audio, Klipsch, Sony, Samsung, Yamaha, Denon, JBL, and more. Contact Pro-Logic Technologies today for subwoofer repair in Nairobi.