I recently purchased three items to help eliminate line noise and hum from my amp. One was a Furman Power Conditioner (PST-8D) for about $160. Then the Ebtech Hum X Ground Line Voltage Filter for about $80 and finally the Pyle (PHE400) Compact Mini Hum Eliminator Box for about $30. The only thing that seemed to help my situation was the $30 Pyle. However, this resulted in a significant loss of tone and volume. Too much to be acceptable in my opinion. I have several amps, both tube and solid state. A bunch of guitars from which I only chose two for this test. Both the Gibson SG Z and the Squier 51 have a combination of humbuckers and single coil pickups. Both guitars are shielded and grounded (Gibson could be shielded a little better). Cable quality 20 foot cable. Yes, I know you'll get less noise with a 1ft cable, but it's difficult to play live when tied to an amp. Both Furman and Ebtech are between the power supply and the amplifier, while Pyle is between the signal and the amplifier. As you can see, Furman and Ebtech alike made no difference to line noise. Pyle (PHE400) attenuated some of the noise, but also the volume and timbre of the signal. I haven't shown every combination in the video, but you should see enough to get the gist. To be fair I paid for a NEW Furman Power Conditioner (PST-8D) but instead they sent me an opened (and possibly used/broken) unit. It definitely didn't suit me. Hope that helps
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