Simontju
Amp is close to 95% efficient and does not have to be large to do so.
"thermal dynamic variations are present in performance" - thermal dynamic variations of what? This is still jibrish to me.
Let me place here results of test made by somebody to 1kW icepower and 100W Icepower (same as mine). Notice that he tests 1kW amp with no hestsinks at all. If you take into consideration that average power in music i very low (only few percent) statements about "Thermal dynamic variations" are complete nonsense. Read below:
"Originally posted by dmfraser
I operated a sample 1000ASP on the bench delivering 350W average of pink noise into a 4 ohm load for over one hour with no additional heatsink and the metal case stayed below 55°C.
However, higher levels would make the power supply voltage go down to act as a thermal compensation. Much nicer than just shutting down.
However, with 1214W of sine wave, partly into clipping, after about 35 seconds, the output level would drop to about 600W by the protection circuitry. Remember this is with no additional heatsink.
The 200ASC, I was able to operate with sine wave at 100W into 4 ohms continuously. Turning it up, with sine wave, the module would shut down at about 214W.
However, with pink noise at 100Waverage and a 6 db crest factor, the 200ASC would run all day without shut down, until I was tired of tying up one of my Audio Precisions with it. It would also run all day with music, driven hard where the output limiter was set to a peak limit of 210W maximum. That is, the limiter would allow small amounts of clipping. Driven so the limit light in our external optical limiter was on essentially continuously.
We're quite satisfied and will be ordering production quantities of the 200ASC shortly."
