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-   -   WinISD Apparent amplifier load power (VA) (http://www.diyaudio.com/forums/subwoofers/251111-winisd-apparent-amplifier-load-power-va.html)

charliecola 13th February 2014 12:38 AM

WinISD Apparent amplifier load power (VA)
 
Hello

I have searched everywhere online and cannot fine a definitive answer to the following question:

When using modelling multiple drivers in one cabinet/design in WinISD: Is the "apparent amplifier load power (va)" graph the load for one driver or all combined?

Inductor 13th February 2014 03:06 AM

Give me an example of a driver model and number of drivers (type of connection series/parallel).

Greebster 13th February 2014 03:38 AM

Just checked WinISD Pro beta 0.50a7 does not appear to correct for multi driver impedance correctly. Chose a peerless XLS10 woofer and tried several configurations, 2, 3, 4, and 5 driver combinations, result is the same impedance for all, meaning the VA load is calculated incorrectly.

It is an old "beta" program.

charliecola 13th February 2014 12:32 PM

It's L26RO4Y I'm looking at - 2 drivers. Unfortunately it's not in the database and I can't seem to upload the WinISD driver file I created.

Do you think in general the apparent load shows as too much or too little?

Also, can I take this opportunity to ask: when measuring the output of a dual driver sealed subwoofer - do you position the microphone at the point on the baffle that is between both drivers?

Thank you for your help.

charliecola 13th February 2014 01:04 PM

Sorry forgot to say each driver will be driven by their own 300 watt amplifier module...


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