<font color='#000000'>Zumbo hang in there!
There are a few of you guys spouting off about percentages of performance of class A/B amplifiers, class d amplifiers and etc. and quoting fabricated bs about manufacturers specifications. I see a lot of mis-informed engineer wana-be's. Exactly where are you applying that efficiency stage in the A/B circuit--input current and voltage or output current and voltage and at what frequency power supply in or out?? And are you under the impression there is a straight feed-thru of power wattage?? What do you think these engineers do when they design the power supply circuit?? What do you think doubling diode circuits do in the process or do you even know what that is?? What do you think the large storage capacitors do in the supply section?? What do you think the secondary windings and coils do in a circuit. You had better not work on a television with that attitude and thinking. You would soon meet your maker with a 50kv to 70kv (50,000 to 70,000 volts or better) discharge with more that adequate amperage storage to fry you permanently (kill you!). What does the power consumption tag say on your television? That consumption figure would certainly not give you a real indication of the voltage and current potential stored in a TV.
Engineers can design power supplies especially with the heavy bulky transformers in audio amplifers to do what they want them to do! All they need to do is add large capacitors, doubling circuits and other components to achieve what they want. And guess what you will see on the 120 volt consumption side....250 watts maybe or 500 watts maybe or maybe more. Speaker wattage output can be far greater output than is indicated on the primary consumption power input!!
Electronics engineering and board design is a little more sophistocated and much more capable than you give it credit for...or probably understand based on the foregoing stuff I read.
Until you can sit the equipment on you own bench and give it a test with proper test and load equipment--whether inductive or direct power resistors (such as dale or others) under monitoring control of high quality calibrated test equipment, I suggest you quit giving your interpretation of what amplifiers can and cannot do just because of your basic misunderstood arithmetic or desire to boast one manufacturers specs are a lie and another is not a lie. If you like a particular amplifier over another...just say so. you don't have to justify or compare it to another one. Regarding printed specifications...these manufacturers are obligated to be honest---lest the federal government would be all over them for fraudlent advertising (and they do keep tabs). You can bet that big guys (Denon, Yamaha, Krell, Onkyo and the list goes on) will for the most part be honest. You have to pay attention, however, when a manufacturer says his receiver puts out 110 watts per channel--is it at 1KHz or 20 to 20KHz (with how many channels driven) at what speaker inductive load (4 OHM or 8 OHM and etc) and at what total harmonic distortion is and etc and etc.
The objective of this forum, I am sure, is certainly not to prove who can electronically outdo who. What would be good, however, is if a manufacturer is fibbing about their specification, it needs to be acknowledged by someone who has thoroughly checked it out on a bench and then rechecked again. And I know there are highly qualified technical people in other forums in Audioholics who do test the audio equipment with high quality test equipment (as well as other review forums all over the internet) There are lots of people who read this forum looking for accurate, high quality information from people who have more experience then they, who would impart honest information to them. Not this nonsense bickering with no valid proof to back it up. Just give them your honest experience with your equipment which may be what they were intending to purchase and live with.
I am certain most all the big manufacturers build quality equipment and most likely you can take their specifications to the bank. Each maybe has different capabilities and different electronic design features. Decisions to purchase should be based on that information...but mostly listening, listening, listening and comparison, comparison, comparison...and what fits your pocket book. We can all be of benefit to the new guy who really needs honest, acurate information and help.
Regards,
Jd</font>
