Onkyo Subwoofers
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The ONKYO SL-1 subwoofer, manufactured in 1990, features a dual enclosure design with a 20cm driver housed in an inner sealed box and a 38cm duralumin passive radiator in the outer sealed box. This configuration enables reproduction of ultra-low frequencies down to 20Hz. Maintenance has been performed, including replacement of the 20cm driver’s urethane edge with fluid rubber coating to prevent hydrolysis, reinforcement repairs on the passive radiator, and restoration of the damaged power button.
While the pilot lamp is not functioning, it does not affect operation, and sweep tests confirm proper performance. The unit delivers a relaxed bass response compared to tighter sealed designs. The subwoofer shows significant wear, with notable damage on the lower right front panel, making it less suitable for those prioritizing cosmetic condition. Weighing approximately 39kg, this model is a rare example of ONKYO’s flagship subwoofer from that era.
Shipping & Authenticity
Authentic item sourced from Japan.
International shipping with tracking.
The ONKYO SL-1 subwoofer, manufactured in 1990, features a dual enclosure design with a 20cm driver housed in an inner sealed box and a 38cm duralumin passive radiator in the outer sealed box. This configuration enables reproduction of ultra-low frequencies down to 20Hz. Maintenance has been performed, including replacement of the 20cm driver’s urethane edge with fluid rubber coating to prevent hydrolysis, reinforcement repairs on the passive radiator, and restoration of the damaged power button.
While the pilot lamp is not functioning, it does not affect operation, and sweep tests confirm proper performance. The unit delivers a relaxed bass response compared to tighter sealed designs. The subwoofer shows significant wear, with notable damage on the lower right front panel, making it less suitable for those prioritizing cosmetic condition. Weighing approximately 39kg, this model is a rare example of ONKYO’s flagship subwoofer from that era.
Shipping & Authenticity
Authentic item sourced from Japan.
International shipping with tracking.
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Onkyo Subwoofers
