Question about Sunfire True Sub MK II Subwoofer
I own a Sunfire True Subwoofer Mark II. Since day one (about 3 years ago), a 60HZ electrical ground hum is present. I found this to be the problem by arresting the hum with a HUMX sold by Ebtech: http://www.ebtechaudio.com/humxdes.html The sub is located across the room in a home theater configuration and is likely fed by a different electrical ground than what feeds the main surround system components. The HUMX works just fine most of the time with the HUMX. However, during operation under what seems to be duress, the sub cranks-up the hum again and can only be stopped by a power-off reset (unplug and re-plug). I have run another power feed from the main component room to the sub, but it still performs the same way? It hums? The hum can be arrested? but, certain audio frequencies (probably 60 HZ) will trigger the continual hum again that requires a power off/on reset. I have disconnected the cable (satellite receiver) and this does not stop the problem either.. Also disconnected the satellite power cord with no success. I have not used a signal hum arrestor. Could this be the fix?.. or is there a hardware problem with the sub? The HUMX? Or another component? Your help is is greatly appreciated? Ron Reynolds ? (501) 884-4414 ? email@example.com
Rolinda303 you are my new audio hero! I bought this used Bob Carver True Sub MK II used last season, it's been something I wanted for the last 20 years, but was disappointed with the annoying hum which you described, sand have tried several things to solve it short of shipping it out for repair. Last night I read your solution of tightening the nut on the nut on the gain control and guess what..my hum went away!!! I can't believe how simple this was. THANK-YOU for sharing!
Posted on Jan 28, 2012
Rita's Vintage Audio Repair is a Bob Carver Company & can repairs & updates Subs at a reasonable cost try calling them.
Posted on May 06, 2009
Everybody has the same problem the 2 1500mf 200volt capacitors are bad.....
Posted on Apr 21, 2011
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Posted on Jan 02, 2017
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