20 Most Recent
Sunfire Hrs10 High Resolution Series Subwoofer Hrs 10 1000 Watts 10" Black Questions & Answers
Making a humming noise
The HRS-10, HRS-8 and HRS-12 amplifiers are practically identical, and they share six small, weak electrolytic capacitors in the power supply board. They are located in pairs. The cheap, original capacitors dry out after several years, and cause the hum. Upgrading them to high quality (e.g., Panasonic) low-ESR capacitors will typically solve the hum, and will last longer than the originals used by Sunfire.
Humming sound in subwoofer after it's been playing for a while
It sounds like you are describing an earth loop problem. I won't go into detail in this post, but try an isolation test first. disconnect everything from the reciever except the sub and try connecting say a BATTERY powered mp3 player or cd player to minimise connections to the electrical mains earth. you could also isolate things by taking your sub to a friend's house and trying it on their system.
If it is an earth loop use a process of elimination to find out which two pieces of equipment causes the earth loop. then apply filtering.
you can buy earth loop isolation transformers for about AU$26 and I've used one on my sub myself. Theyhave RCA (phono)plugs on each end and they connect inline with the signal cable to the sub amp.
as for the thumping sound it might be the speaker protection circuitry cutting off the amp to protect the subwoofer speaker from damaged. This might be triggered if the earth loop sound is causing the sub amp to overload and clip.
Failing this there might be a dried out overheated electro capacitor in the amp circuit causing the hum. Hav a chat to your local electronics person, who should be able to spot it!
Hope this puts you on the right track
Happy Hunting!
Audiosonic CR-06PL not changing time when following manual instructions.
Set Time Hours and Minutes: Press Time/12/24 and Alarm1/ON/OFF buttons at the same time for two seconds and it will start to blink the hour.
Press and hold the button for a fast setting or tap it briefly to increase the setting by one hour. Now set the minutes with time (press and hold) and min.
How do I set the Audiosonic clock? Set current time Press and hold the time button and simultaneously press the hour to set the hours in 24-hour mode .
Not finding what you are looking for?