I have same problem... I actually was getting worse hum
from a powered terestrial antenna i use for local HDTV. I had to get rid of the power module. Im still getting minor hum from SAT connection. I got rid of the cable and that helped. See below sounds like Aragon has adressed the issue..
INDIANAPOLIS (September 27, 2002) — Post project completion visits to the job site are expensive for the installer, but Aragon has introduced a complete solution for power distribution and hum and noise prevention in home A/V systems, thereby eliminating many common performance-robbing complications. The new Aragon M.A.G.I.C. Power Box power controller consolidates multiple functions into a single component to maximize installer and user convenience.
Styled to match Aragon’s new Stage One digital preamplifier/processor, the Aragon M.A.G.I.C. Power Box combines voltage-triggered AC switching, surge and EMI/RFI suppression, ground-loop interruption for cable and satellite TV connections, and 12-volt DC power supply in a single component.
Half of the back panel of the new Aragon M.A.G.I.C. Power Box is devoted to eight industrial-grade AC outlets with built-in surge protection and EMI/RFI rejection. Six are switched, two are unswitched, and each has both front- and back-panel status LEDs. Two of the switched outlets are on a 2-second delay and the other four can be easily converted to unswitched via a back-panel toggle. Switching is accomplished via a 5- to 30-volt trigger input, which is flanked by a 500-milliamp trigger output for controlling other components.
In addition to AC, the M.A.G.I.C. Power Box provides two sets of binding-post terminals that supply 12-volt fully regulated and short circuit protected power for auxiliary devices, such as IR blasters and keypads. One set is switched and the other set is unswitched. There is also a front-panel vacation power switch that completely disconnects the AC line to protect the system components.
A feature unique to the M.A.G.I.C. Power Box is Aragon’s patented M.A.G.I.C. circuitry for breaking the hum-inducing ground loops often created by cable-TV hookups. M.A.G.I.C. is superior to traditional transformer-based solutions because its special circuitry introduces almost no signal attenuation and minimal bandwidth reduction. The Power Box provides a one-in/two-out RF splitter with M.A.G.I.C. circuitry built in. But in this product, Aragon has extended M.A.G.I.C. functionality to satellite-TV connections as well. Because satellite systems require an uninterrupted ground connection on the RF line to carry the signal from the dish, the Power Box also applies M.A.G.I.C. technology to a complete set of audio and video loop-through connections. Connecting a satellite receiver to the system through these M.A.G.I.C.-enhanced input/output loops isolates its ground, thereby preventing ground-loop hum. Connectors are supplied for component-, composite-, and S-video, left- and right-channel analog audio, and coaxial digital audio.
The M.A.G.I.C. Power Box matches the appearance of other Aragon components, with the same size chassis as the Stage One preamp/processor, the same faceplate design, and the same adjustable (on/dim/off) blue-downwash panel illumination. It will be available with a black or silver finish. The Power Box will ship to specialty audio retailers in the first quarter of 2003 with a suggested retail price of $1,500.
Aragon brand high-end electronics and premium audio products are handcrafted in the U.S.A. by Klipsch Audio Technologies and its Mondial Designs Team. Klipsch Audio Technologies is a privately held global corporation with worldwide corporate headquarters in Indianapolis and manufacturing facilities in Hope, Arkansas. Klipsch makes and markets premium home, commercial, professional cinema and multimedia loudspeakers under the Klipsch brand name, and high-end amplifiers, preamplifiers, processors and other electronics under the Mondial Designs and Aragon brand names.