08-10-12: AudiozenAs I said previously, I don't doubt that the Magtech is an excellent amp. I also don't question the possibility that the approach to voltage regulation used in that design may be a significant contributor to its high efficiency and cool temperatures.
I dare you to name any other class A/B amp on the market that does not have oveload clipping shut down circuits in the same price range as the Sanders Magtech.
08-10-12: AudiozenThis statement is, to use your word, baloney. I say that as someone with multiple decades of experience designing advanced analog and digital circuits (not for audio), and having multiple degrees in electrical engineering.
BALONEY..what a load of crap. Voltage fluxuation results in a volume of wasted current that decreases the available current to watts to the output since the voltage is unstable. The wasted fluxuating current holds up in the amp due to unstable voltage regulation which results in a higher volume of heat heat due to current delay in the amp. By stablizing the current with a linear regulator eliminates voltage fluxuation and there is no wasted or delayed current in the amp which results in lower heat since the total voltage is completely stable going to the output resulting in a cooler running amp.
From the Magtech's description:
Audiophiles would not consider using a source component that did not have regulated power supplies. So why use amplifiers with unregulated supplies?What this statement is saying is NOT that voltage fluctuation due to lack of regulation causes other amplifiers to run hot. What it is saying is that voltage regulation is not provided in most other amplifiers because if it were, the regulator itself would cause the amplifier to run excessively hot, especially in the case of a conventional linear regulator (as I indicated in my previous post). Apparently you have misinterpreted this.
The main problem is heat. Amplifiers operate at much higher voltages and currents than line level source components. These higher voltages and currents forces conventional regulator designs to waste large amounts of energy, which wastes expensive electricity and causes the amplifier to get very hot.
Also, many regulator designs radiate RF (Radio Frequency) energy when switching high currents and voltages. This RF gets into the amplifier's electronics and can cause instability, oscillation, and noise. As a result of these problems, modern power amplifiers do not use regulated power supplies and fail to take advantage of the benefits available from doing so.
Sanders has solved these problems by developing a voltage regulator that is essentially 100% efficient. There is no heat dissipated by the regulator system. There is no high-power/high-voltage switching that causes heat generation or RF problems.
The regulator in the Magtech amplifier maintains a stable voltage regardless of load or reasonable changes in the line voltage feeding the amplifier. It runs stone cold, produces zero RF energy, and is simple and reliable.
Based on your tone, I suspect that further discussion of the matter would not be constructive, so you can have the last word. Others reading this thread can (and will) reach their own conclusions as to which viewpoint to believe.
BTW, it is "fluctuation," not "fluxuation."