Question about Mirage LF100 Subwoofer

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I have had a MIRAGE LF150 Subwoofer for about 4-5 years. Recently, my house was hit by lightning which tripped the circuit breakers in our electrical subpanel. Before flipping the breakers back on, we did not unplug the surge protector that the sub was plugged into (mistake!). Now the sub is wigging out (it hums and flutters when plugged in), yet the other components seem fine. Is the thing fried??? I love this sub and I hope there is a chance of saving it. All the other components that were plugged in to the surge protector seem fine. Advice please!!!! Thanks in advance.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 31 Answers

SOURCE: Constant noise from Mirage NanoSat 5.1 System Subwoofer

sounds like an earth fault either with the plug circut or more likely with the power board of the unit.

Posted on Jan 06, 2010

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DaveMc3
  • 32 Answers

SOURCE: Internal damage to Mirage BPSS-210 Subwoofer amp

Something getting hot probably means something shorted out. You probably know that since you replaced the fuses already... . Can you give me some idea of what you do and do not know about electronics? Then I will say fewer dumb things. . When troubleshooting any electronic device, especially amps, open it up and look at the circuit board. Look for burned board and components. Then test to see if the burned/blown component had reason to blow (it probably did). . Often a shorted transistor runs too much current through some other component and the other component blows up. . Another cause, less common, is a shorted cap. . Look at the schematics if you have them, if not, you may have to create one to make sense of it. . Or take it to a shop where somebody does this all the time. The only one here went belly up in the last 12 months... . . About the pots . Try blowing out the pots which are popping with some tuner cleaner. Use with caution, and always with everything turned off and power cords unplugged. . Pots do not usually make popping noises unless they are very old or live in a very dusty place... . I found the manual, but no schematics... http://docs.google.com/viewer?a=v&q=cache:9Doi39-AcW0J:www.miragespeakers.com/images/download/374.aspx+Mirage+BPSS-210+schematic&hl=en&gl=us&pid=bl&srcid=ADGEESjBKgLSTb8wp5SRWIOWd-gE0INdBXbfz5QDNJ_3esye4_R2Q9aKba8cEePSWQWOebeXB9zXnJSelIel2bLSR5q6KExe8MVjOk1zqFKk4K-ruti_797yf1Ig3CIcUNjE49jx8DAr&sig=AHIEtbS6udedt_o6GqL7ALPunU0v3vMvuw . You might be able to get better, more exacting help on the Mirage Forum... http://community.miragespeakers.com/forums/ But maybe not, since the Subwoofer section gets less than one post per month, and the much busier Technical Questions section only has 23 in the last 12 months.

Posted on Feb 08, 2010

  • 144 Answers

SOURCE: mirage s8 subwoofer is emitting a constant hum

that is just the radio from the input,its normal

Posted on Jun 19, 2010

  • 60 Answers

SOURCE: we have a mirage lf-150

Open the unit and look for bulged or leaking capacitors.
Replace the suspicious ones.

Hope this fixes the problem.

Posted on Apr 11, 2011

  • 2 Answers

SOURCE: I have a Mirage Prestige

I have the same sub. For the past 6 months it seems to only activate when it wants to (even though indicator is always blue and on). Today I opened it up (remove speaker from the bottom and found that there is a small 250v glass fuse that had was barely attached (metal contact in the middle was all but burned out). Bought a replacement fuse from Lowe's and sub is back in business. Going to keep a few of these on hand from now on. I don't really turn the sub up that much so was kind of suprised, but it is what it is.

Posted on Sep 06, 2012

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Our electricity went out for a few minutes, and since then the TV will not turn on. The green light is flashing. We tried resetting it by pushing a pen point into the reset hole, but it does nothing. ...


Your power outage may have been caused by a nearby lightning strike, or any number of
1000 different reasons that cause power surges, brown-outs, voltage spikes, inductive loading,
and/or utility pole breaker trips and resets (this accounts for your power loss (a pole breaker trip),
followed by restoration of power (the pole breaker automatically reset) - even plain old high electrical demand causing an overload due to air conditioning demands caused by hot weather.
When the pole breaker reset, your TV caught a power surge.
Whenever a power outage occurs, quickly power off (or better, unplug) any/all computers, TVs,
etc. that are not protected by surge-protection.
As an electrician, when someone loses an item of electronics concommitant to an electrical
anomaly, its almost
always traceable to a nearby lightning strike (or the power company provided equivalent), accompanied by inadequate surge protection for
the VCR/TV/Computer/Stereo/uninsured valuable electronic item/XBOX 360/Nintendo Wii.
Surge protection can
be provided by the consumer at the power strip (a good one with builtin MOV protection and a
warranty costs $20, whereas a zero-protection 4-outlet or 6-outlet power strip will cost $4-$5).
Your electrician can provide whole-house surge protection where a whole-house MOV-based (metal oxide varistor) surge protector, or per-circuit protection can be installed with
a GFCI breaker (or better, an AFCI breaker) can be installed.
GFCI = ground fault circuit interruptor
AFCI = Arc fault circuit interruptor
Lightning protection is especially important in Florida, which is the "lightning capital of the world."
I've never found a good solution to lightning-fried electronics (random power supply components are destroyed and/or fuse blown), other than renters insurance or homeowners insurance.

Your only real hope for an economical fix is to look for a blown fuse, and replace it.

If desperate to attempt a fix on your own, you could try replacing the entire TV power supply as a module, but even this provides
no guarantee of a fix - lightning damage can extend beyond the power supply.
When traveling, I will always unplug everything before I leave (except the security system),
and also turn off the breakers to unneeded house circuits (which kills the wall switches that
control interior lighting - forcing a burglar to use their flashlight instead of interior lighting)
which is the least convenient lightning protection, but highly effective, and cheap (free).

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