Using step up / down transformers?

I'd like to be more precise in regard to transformers on ac lines. I stand by what I said about diminished performance with my diy bucking transformer. I did suffer transient blunting and micro and macro dynamics suffered with trans. I'd like to make clear this was with 845 SET amp, this amp generates around 1000 internal watts and requires much current. I use dedicated ac line with 10 gauge special romex to feed. I've also  found my 845 amps or any of the other many tube amps I own do suffer from these same liabilities using any power conditioner, regardless of design, and I've tried many over the years.

Now, I do use a transformer based power conditioner on the rest of my system, this 82lb behemoth diy modded with high voltage film caps and Oyaide R1 receptacles. This has proven to be best pc for all the rest of my equipment. The amps do suffer with this pc.
IMO, amps should be on their own dedicated 10 gauge ac line, nothing else on that line.

@sns, 
''IMO, amps should be on their own dedicated 10 gauge ac line, nothing else on that line.''

I agree 1000%. 

Let's say that a 120 volt line (load) is drawing 10 amps. Since it is a single ended design, the draw will be carried by the hot conductor. 
 By the same token, using the same example of a 10 amp draw, a 220 volt line will still draw (or I should say the load will draw) 10 amps total, BUT since it is a Balanced design, each conductor would be drawing 5 amps. The total is the same. The word efficiency, may be applied to the fact that a smaller gauge wire can then be used. 
 I have heard however that there is an increase in efficiency of electric motors because the power is coming at opposite phases (times).

@cleeds, 
Remember: Volts/amps.
Maybe this will help.

P = I x E
P = Watts, Volt-amps.
I = Current, Amps.
E = Voltage.

Will a 240V 1500 watt space heater connected to a 240V source produce more heat than a 120V 1500 watt space heater connected to a 120V source? No.....
Current, amps?
P / E = ?
1500W / 120V = 12.5 amps.
1500W / 240V = 6.25 amps.

ditusa

@cleeds,
Remember: Volts/amps.
Maybe this will help.

@ditusa you are confused. 240VAC is not more efficient than 120VAC. You apparently believe than amperage is a measure of power, which is mistaken.

Power is measured in watts. To calculate power, you multiply the amperage (which only measures the flow of current) by the voltage.

You’d probably benefit from reading a basic text in how electricity works.