I have had a Pure Acoustices XP12- 200 (powered sub) for about five years and now it has developed a fault. The sub was used in a 7.1 surround setup driven by an Onkyo 807 amp.
When the amp is powered on, the sub will generate a motor-boat-like sound, even when no audio is present. After about a minute the thumping fades to a hum. I have switched connections - secured ground wires attached to both sub and amp but still no improvement.
Any adjustment to the sub's controls only increases the thumping sound. I would like to try a diy repair before relegating to the rubbish tip.
Besides saving a few hundred dollars, recycling saves the environment and hopefully, I will learn something from the diy experience.
Thanks
When the amp is powered on, the sub will generate a motor-boat-like sound, even when no audio is present. After about a minute the thumping fades to a hum. I have switched connections - secured ground wires attached to both sub and amp but still no improvement.
Any adjustment to the sub's controls only increases the thumping sound. I would like to try a diy repair before relegating to the rubbish tip.
Besides saving a few hundred dollars, recycling saves the environment and hopefully, I will learn something from the diy experience.
Thanks