First Watt SIT-1 - Input Sensitivity - diyAudio
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Old 12th March 2015, 07:46 AM   #1
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Default First Watt SIT-1 - Input Sensitivity

Could anyone explain to me how to calculate (or indeed know) the input sensitivity of the First Watt SIT-1 amps?
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Old 12th March 2015, 08:14 AM   #2
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per P=U^2/R , 10W/8R means U=8V94 rms at output

as 18db of gain means 7.94V/V (per db=20log(V/V) )

so ...... 8V94/(7V94V/V) ........ you need 1V12 at input , for full blast at output
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Old 12th March 2015, 08:27 AM   #3
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Thank you Zen Mod for the speedy explanation, it is great to know how to work these things out. As it stands my TP Buffallo DAC/Legato outputs exactly 1.5v.
That, as they say in Mary Poppins, is Fortuitous :-)
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Old 12th March 2015, 08:35 AM   #4
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ya mean - supercalifragilisticexpialidocious !

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Old 12th March 2015, 10:22 AM   #5
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Yes I'm hoping for supercalifragilisticexpialidocious Zen Mod, they hopefully arrive the middle of next week so we shall see. Current amps are Welborne Terraplane Monoblock 300B's & speakers are Beauhorn.. horns... 'Chim Chimney'
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Old 12th March 2015, 11:55 AM   #6
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mmmmmmmm SIT1 .......

yum yum ...

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