Surge protector

@12blistn 

I phoned a GoldenEar technician right after the outage. His first response was that it was blown amps.  I wish it were otherwise.

OP:

If it were me, I’d 100% ask if they can repair just the amps. 😂  The amp is going to be a lot lighter and smaller than the whole speaker.

If you feel comfortable with a screwdriver you should be able to remove the sub amp and ship that alone to them. When you do, measure the resistance of the subwoofer coil with any cheap multimeter, and talk to GE techs first. If they measure like a dead short or infinity you may have bad woofers as well.

The amps have shipped and should arrive Tuesday.
Unfortunately, I am not the least bit handy, so I am going to suffer the expense of paying a technician from the dealer.

@erik_squires Said:

@jea48 - Furman with SMP will protect in both cases you mentioned.

The 135V overvoltage shut down is a great feature.

Furman:

Another feature that is unique to Furman’s SMP circuit is automatic extreme-voltage shutdown. Extreme voltages are statistically the most common, damaging AC event.

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Furman:

Extreme voltages are statistically the most common, damaging AC event.

 

Exactly. Again, an SPD will not protect equipment from an overvotage event. Can't help but wonder why more manufacurer's don't use this feature in their Type 3  SPD. I mean it ain't like they don't know.... They say in their warranty, damage caused by an Overvoltage is not covered.

 

And this ???...

Furman SPD Specs:

• ComplianceC-UL (UL standard #1449, #1363)

ComplianceC-UL UL standard #1449 ??? 

1449, what Edition?  (3rd Edition), (4th Edition)?

Compliance? Is the Furman SPD UL 1449 (Edition number) Listed, Certified, and or by a recognized NRTL third party testing Laboratory? The specs doesn't really say.

SPD UL Listed

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FWIW:

How may have read this? For those with Sub panels for the audio equipment where the branch circuit wiring is less than 30ft from the wall outlet to the sub panel.

Type 3 - Point of utilization SPDs, installed at a minimum conductor length of 10 meters (30 feet) from the electrical service panel to the point of utilization, for example cord connected, direct plug-in, receptacle type and SPDs installed at the utilization equipment being protected. The distance (10 meters) is exclusive of conductors provided with or used to attach SPDs.

At the very least a good quality type 2 SPD should be installed, connected, to the sub panel. 

Sounds like a cord and plug Type 3 SPD will do little, if anything, for protecting audio equipment from a high voltage transient event if the branch circuit wiring is less than 30ft long.  

 

@erik_squires Said:

I want to point out that we’re deep into the "what if" situations that are not the major cases.

 From Furman info:

Extreme voltages are statistically the most common, damaging AC event.

Seems like every other day there are bad storms from the southeast up through the northeast. In many cases the storms produce high winds that are bringing down high voltage power lines. ( Subject Not for homes in the direct path of Tornadoes of course.)  I would imagine the downed high voltage power lines are not causing high overvoltage on the mains wiring of houses.

One thing that can help to limit the very high-voltage from entering on the mains wiring in the house is a 5 ohms or less to soil Grounding Electrode system. (Grounding Electrode System. The grounding connecting the Electrical Service Entrance Neutral Conductor to Mother Earth, making it the Grounded Conductor.)

Simple OHMS LAW... The lower the Grounding Electrode to soil resistance the lower the high-voltage that can enter on the house mains wiring.

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2020 NEC

Quote:

250.4 (A) Grounded Systems.

(1) Electrical System Grounding. Electrical systems that are grounded shall be connected to earth in a manner that will limit the voltage imposed by lightning, line surges, or unintentional contact with higher-voltage lines and that will stabilize the voltage to earth during normal operation.  

End of quote.

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A couple of years ago I experienced a weird event. Day was sunny, little to no wind. I just happened to be sitting at the computer all of a sudden the ceiling lights in the Den started dimming quickly followed by a loud buzzing sound from the two small speakers on each side of the monitor. Scared the heck out of me. Power in the house went off but only it seemed like a few seconds, then the power came back on followed by the loud buzzing again from the two speakers, followed by the power going off again. Then in just a matter of a few seconds it came back on. I jumped out of my seat but before I could get to SPD plug strip the power was back on and before I could pull the plug at the wall outlet the load buzz from the speakers started again. This time the power went off again and stayed off.  I immediately went to the basement mechanical room and shut off the Main 200A breaker. I had no idea what had just happened...

I believe this was the Utility Power Company's piece of equipment that was turning the power back on. Three times it tried.

A high-voltage Recloser

 

Luckily all I lost was the computer.

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Thanks for the info.  That makes sense.  I'm running my T1's as rear surrounds and have them on a small APC surge protector.  My front end electronics are on a Furman Elite 20, but my front T Ref's and power amps are just into the wall.  Maybe I need to rethink things.  I'm in Vegas.  We don't get many thunder storms, but do get a few.  I've never had a destructive power surge so far, but......