jea48
Responses from jea48
| Krell KAS amplifier hum @georgehifi The Krell amps do plug directly into the wall outlets. Each amp has its own dedicated 120V 20 amp branch circuit.The " Silver Circle audio, "pure power one 5.0 power conditioner" feeds the ARC preamp and the front end equipment. All i... | |
| Krell KAS amplifier hum Al (almarg),I was hoping you would chime in at some point.Them Krell amps are pigs and are power hungry when pushed hard.I looked over what you posted and will respond tomorrow. I noticed the OP posted after you and he tried some additional tests.... | |
| Amplifier Hum - Only Amp Connected Does the hum sound like this? 120Hz hum. https://www.youtube.com/watch?v=pC4Uzt0qm2E If yes it could be failing electrolytic caps in the power supply. How old is the amp? Manufacturer and model? | |
| Krell KAS amplifier hum @ jg2077,Does the cable box connect to the audio system, in question, in any way by wire type ICs?Does the cable box 120V power cord have a 3 wire grounding type plug? If yes just for the heck of it unplug it from the wall convenience outlet tonig... | |
| Krell KAS amplifier hum georgehifi6,400 posts 12-12-2019 12:32am Also use some "earth cheater plugs" on the preamp and source/s so they get the earth from the Krells through the interconnects, this way you stop any more earth loops through the house wiring. Use of groun... | |
| Krell KAS amplifier hum georgehifi Said: If your hearing hum through the speakers.KAS Monoblocks can give hum by their very nature of being mono blocks, they should BOTH be plugged into the same heavy duty mains outlet to stop any earth loops through the house wiring. ... | |
| Krell KAS amplifier hum jg2077 OP41 posts 12-11-2019 7:52pm All was unplugged from the back of the pre, I still have "hum".I ran a ground wire from the pre power cord (plugged into the back of the power distributor) to the ground of wall outlet the power distributor is... | |
| Krell KAS amplifier hum jea48 said: You can also use a 2 wire IEC power cord if you have one instead of using your existing preamp power cord. You won’t need a ground cheater then. That won’t work..... The male ground pin on the IEC inlet on preamp would be in the way. | |
| Krell KAS amplifier hum @ jg2077 There is a good chance the existing 120V 15 amp convenience outlet branch circuit safety equipment ground is causing the ground loop hum. There is a good chance there is a difference of potential, voltage, between the convenience outlet s... | |
| Krell KAS amplifier hum OP,I assume you are hearing the hum from the left and right channel speakers.Hum is probably caused by a ground loop.Are you using balanced ICs or SE ICs?How are you feeding 120V power for the preamp and the connected front end equipment? Another... | |
| Amp tripping circuit breaker. jetter1,477 posts 12-11-2019 8:03am I had the same thing happen, but only with a particular high current amp. Other more modest amps would not trip the breaker. But if I plugged the high current amp in any other circuit it would not trip... | |
| Amp tripping circuit breaker. magneplanman OP4 posts 12-10-2019 11:44am One thing I forgot to mention - the reason I suspected the amp is because it’s own protection was tripping earlier in the summer, often immediately when powering from a cold start. It ended up going awa... | |
| Amp tripping circuit breaker. @OPBy chance is the electrical panel/ AFCI breaker in the panel a Square D type? By chance does it have a white test push button? If so it is a CAFI AFCI and you can test whether the breaker is tripping on over load or short circuit, or, if it i... | |
| Amp tripping circuit breaker. magneplanman OP1 posts 12-10-2019 11:44am One thing I forgot to mention - the reason I suspected the amp is because it’s own protection was tripping earlier in the summer, often immediately when powering from a cold start. It ended up going away... | |
| Amp tripping circuit breaker. Unknown if it matters if amp is on or not. Yes it matters. https://www.youtube.com/watch?v=ihforRdL-TU |