tips to calculate amp gains |
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_Natty_
Young Croc Joined: 01 April 2007 Status: Offline Points: 663 |
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Posted: 30 April 2017 at 3:21pm |
can anyone please help me to choose the right inputs value for this calculator: i need input V and output voltage, for these cases: -powersoft k10 run in stereo at 4ohm: output peak 200V input ??? maybe 4,49V? -crest 9001 run in stereo at 2ohm: output peak output peak 161V input 2,226 (rated at 4ohm -what thats mean-) - AB class amp run in stereo a 4ohm: input voltage (this is from the paper) 0,775V output not showed in V just power output in W thanks to any help |
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corell
Young Croc Joined: 19 August 2013 Location: Berlin Status: Offline Points: 1161 |
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U = sqrt(P*R) <=> U² /R = P
0 dbu = 0,775V 0 dbV= 1V L (in dbu) = 20* log (U/0,775V) <=> U = 0,775V * 10^(L (in dbu) /20) These are all the formulas needed. If your amp has a voltage gain of 20db (or a "power factor" of 10) , it will put out 10 times as much as you put in. If it has 26db, it will put out 20 times as much, 32db = 40 times and so on. For your K10, if you set the voltage gain to be 32db, it will give out its 200V max (meaning 5000w at 8 Ohm) at 5V input... Edited by corell - 30 April 2017 at 7:40pm |
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_Natty_
Young Croc Joined: 01 April 2007 Status: Offline Points: 663 |
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thanks a lot, i will put all on papers and i will make some calculations... i thing that even tha cable lenght and section should be part of the problem but i think is hard to simulate such hard system with a lot of variables... i will put my mind on it.
if some one would love to collaborate i can even write some web application to host a complex calculator...just some random idea cheers |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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They have - you're using it, you just need to use the right sections and do some maths and data collation yourself.
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