Products to improve signal
quality... Ground loop isolators are perfect for removing noise and hum from
your home Hi-Fi or car stereo and are particularly recommended for use with
laptops. Differences in voltages between components can oscillate rapidly, creating
a background hum or whine. Noise suppressors are commonly used with car radios
to help with hum caused by car electrical systems, they are also suitable for
use with other 12V equipment. Ferrite beads can put around cables to help with
rejection of RFI and EMI interference.