Hi,
is it possible to inrease the measurement range of the audio analyzer?
The range is up to 600W @ 4 Ohm.
But I would like to measure 1200W @ 4 Ohm.
Can this be done by replacing some resistors, and halving the input signal?
I wouldn’t mind having a “wrong” value on the display, and multiplying it by two while reading it.
regards,
Mario
Easiest way to do but with bigger measuring fault: replace R5 by 22 k or, for a smaller measuring fault: a 22 k with 330 ohms in series (totally 22.33 k).
You may not use HALF of the voltage because half voltage = one fourth of power.
for the unit to correctly display the power, would not a software change be needed as well? i don’t have a copy of the source code but the display would still show 600 watts when in reality the value is higher then that. To me the unit is just a volt meter, every thing else is calculated in software?
I wish there where settings between 4 and 8 ohms as my speakers nominally are about 4.5 to 5 ohms. some speaker systems are even 6 ohms or so i.e some Bose systems.
The math is easier though for the unit it’s self the way it is
I know it’s difficult to find a meter with this wide range as a kit
Yes, but you said you didn’t mind doubling the values yourself.
Hey laserguy, thanks for your responses.
But the post above your’s is not written by me.
It’s from another person
@Chrysophylax:
please keep in mind that there is a DC resistance (which you can measure with you multimeter)
and the “impedance” (alternating current resistance).
And, more important, the impedance changes considerably over the frequency spectrum.
E.g. a subwoofer hast an impedance of 120 Ohm [at 40Hz] but an impedance of 4 Ohm [at 120Hz}.
Really difficult