Question about Sunfire True Sub MK II Subwoofer

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My sunfire subwoofer starts making humm noise after a couple minutes while listening music,,, I have to disconnect and connect back, is something that involves equipmenrt adjustment?....thanks

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Sunfire used low quality electrolytic capacitors. As those capacitors fail, a hum develops, eventually it can even blow the output transistors. In other instances it simply silences the sub. No signal gets through to the output. Beware of the Jun Fu capacitors. I'd use Panasonic low ESR or Nichicon low impedance capacitors instead.

Posted on Sep 27, 2012

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Try plugging the unit into a clean power supply without anything else on it. I had this problem for years and eventually resolved it by moving the system to a different room that has three power circuits - the sub is now on it's own circuit and I don't have the problem anymore.

Posted on Nov 28, 2009

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Just recapped, I hope that noise goes away. BTW- does anyone know how to repair either the Junior or the Architectural? Need some help here because the output FET's and transistors are all blown.

Posted on Jan 11, 2013

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Posted on Jan 02, 2017

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