I picked up this system a couple of days ago and ran a few tests. First, I ran the impedance sweep and TS parameters for my 2x3015 bass guitar cab and found that the measured response matched the model simulated by .950 Winisd. So that was good.
I ran free air and vas tests for one of the two drivers and came up with some pretty pronounced deviation from factory data sheet. (1 and 2)
Although BL is pretty much bang on. But Vas is way higher and Re is a bit higher.
And then ran tests in cab for my 15/6 cab details of which are in my post 15/6 bass cab design. (thumb 3)
I have a couple of questions:
Is it possible for sustained periods of heavy use to impact the FA parameters like this? Or do I have a problem?
In the third thumb, 15.6 DATS, it says the Re is 6.323 ohms. What does this mean?
From this data on the 15.6, what would you say the nominal impedance of this cab is?
Thanks in advance for any/all the help.
I ran free air and vas tests for one of the two drivers and came up with some pretty pronounced deviation from factory data sheet. (1 and 2)
Although BL is pretty much bang on. But Vas is way higher and Re is a bit higher.
And then ran tests in cab for my 15/6 cab details of which are in my post 15/6 bass cab design. (thumb 3)
I have a couple of questions:
Is it possible for sustained periods of heavy use to impact the FA parameters like this? Or do I have a problem?
In the third thumb, 15.6 DATS, it says the Re is 6.323 ohms. What does this mean?
From this data on the 15.6, what would you say the nominal impedance of this cab is?
Thanks in advance for any/all the help.
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Driver TS Parameters: Cms (Compliance) & Vas (Compliance Equivalent Volume) >> speakerwizard.co.uk
Vas is is proportional to suspension compliance which is a very hard parameter to control and varies a lot with temperature. Try doing the measurements at different temperatures and you will see.
Vas is is proportional to suspension compliance which is a very hard parameter to control and varies a lot with temperature. Try doing the measurements at different temperatures and you will see.
Gord,
It's the AC curve that matters ( for everything but "naming" conventions ).
- IOW; don't fixate on labels .
That AC curve ( as an .ZMA file ) is used within crossover simulators.
The pic comes from Wikipedia ( Nominal Impedance ).
It's the AC curve that matters ( for everything but "naming" conventions ).
- IOW; don't fixate on labels .
That AC curve ( as an .ZMA file ) is used within crossover simulators.
The pic comes from Wikipedia ( Nominal Impedance ).
Is it not fourth components; resistance, inductance, capacitance and frequency?
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