| RE: Popping sound subwoofer in HK sound syste,
The drivers in those systems are made of toilet paper!
You are overdriving the woofer such that the voice coil is lifting out of the magnetic field.
That is the popping you are hearing.
Keep that up and you'll burn out the voice coil and toast the driver.
You need better quality drivers and amplifiers, and you would hear a world of difference. | 
