This is what one of the more costly conditioners said it could do.

The quality of AC power has been so poor for so long, most musicians have no idea how great their amplifiers could really sound. When the AC power factor is poor, amplifiers sound muddy because their power supplies can't deliver when pushed. The scream and cry from a guitar loses bite and harmonics, basses lose their punch and weight, keyboards sound nasal, losing clarity, attack, and extension. The answer is Furman's Power Factor Pro.

The Power Factor Pro's Clear Tone Technology actually lowers the AC line impedance supplied by your wall outlet, while storing energy for peak current demands. In fact, there are over 45 amps of instantaneous current reserve in the Power Factor Pro. Additionally, Linear Filtering TechnologyTM dramatically lowers AC line noise to unprecedented levels in the critical audio frequency band. What does this mean? Just plug in your current starved amplifier, crank up the volume, and listen to the dynamics, harmonics, and clarity you've been missing!

Additionally, the Power Factor Pro is the most comprehensive power conditioner ever created for the serious musician. Maintenance free - Series Mode Protection guards your equipment from voltage spikes that can damage your clamps at 188 Vpk, 133 VAC RMS even when tested with multiple 6000 VAC - 3000 amp surges! The pro level over-voltage auto shutdown circuit assures you will never see your prized amplifier go up in flames due to a sustained voltage overload.

The Power Factor Pro R has a generous 12 amp RMS capacity, a convenient 20-segment AC voltmeter, one front and 8 rear AC outlets. Rear BNC connector allows connection of standard 12V gooseneck lamp for rear-panel illumination, all in a single-rackspace design.


Now as for the Euro and American plugs. That is beyond me. I guess I could say get a Euro conditioner and an American on and wire accordingly but I can't say with any certainty if this would work. It seems to me that maybe you could find a some step downs with the same capability as these conditioners but again I don't know.