maverick24m Posted February 21, 2006 Share Posted February 21, 2006 Rite, Im fairly newish to the sound world but often read the forum. Is there anyway of measuring the output of anplifier? Ive seen many ways of how u put a fake resistance. But tbh where are you going to find enough 8ohm or 4ohm resistors capable of taking 1600w+ ? The only reason I ask is that the 2400 version we have is definitely outputting more therefore increasing the volume of the stack it is connected to... But when you connect up the same stack to the 3200, it appears much quieter. The sound is not muffled of unclear, just noticeably quieter!!! The stack btw is A Mach 154, tl15 and a tl18 sub. So the 3200 is no way overdriven... Any suggestions or a well used method of measuring the output without deafenning the neighbours would be much appreciated.. Many Thanx Franko Link to comment Share on other sites More sharing options...
dbuckley Posted February 21, 2006 Share Posted February 21, 2006 But tbh where are you going to find enough 8ohm or 4ohm resistors capable of taking 1600w+ ?By using many higher value resistors in parallel. For example, if you put 20 100W resistors in parallel, each of 80 ohms, then you get a 4 ohm 2000W resistor. You also need to fan cool it. A 2000W resistor is nothing, when you need to dissapate load you need a fan heater, and heres a slightly larger example, a mere quarter million watt fan heater: http://www.davidbuckley.name/pix/loadbank.jpg This thing can raise the temperature of its surrounds quite quickly These also come in bigger sizes... Link to comment Share on other sites More sharing options...
Brian Posted February 21, 2006 Share Posted February 21, 2006 This thing can raise the temperature of its surrounds quite quickly These also come in bigger sizes...They are quite awesome. I used to have an annual 8-hour full load test performed on my installed generators. In winter, one of those loads would melt the snow in the street no trouble. Link to comment Share on other sites More sharing options...
Rob_Beech Posted February 22, 2006 Share Posted February 22, 2006 Input sensitivity could be different. Alot of amplifiers have a different input sens througout the range. meaning you need a higher or lower signal to drive it to 0db (with the sens controls on the amp turned to their highest point at all times). Do you know that on BOTH occasions (with each amp plugged in) that the amplifier is driving to the same level. (ie 0db). you may find that you plug in the larger amp and put the same signal to the amp and as the amp requires a larger voltage to drive to 0db you have to increase the signal. There MAY be a switch on the amp internally to alter the sens. This is likely a switch between .775V and 1.2V or similar. If you have done this already and you are working with a signal at 0db on both ocasions then you may need to look at something else.At this time of night. I'm not too sure what. rob Link to comment Share on other sites More sharing options...
maverick24m Posted February 27, 2006 Author Share Posted February 27, 2006 Hey people, Thanks for the above. We always (or atleast always try to) run our systems at 0dB so in the end we opted for the send it back to the manufacturer method. Slight downside is that that envolves sending a 35Kg amp to Thomann!!! not a cheap hobby. Anyway thanx for the always reliable info, have successfully tested the rest of our amps using the resistor method. Franko Link to comment Share on other sites More sharing options...
Rob_Beech Posted February 27, 2006 Share Posted February 27, 2006 oh dont leave us guessing. have you found anything interesting? rob Link to comment Share on other sites More sharing options...
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