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Old 3rd February 2004, 02:45 AM   #1
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Default measurement TS in a double voice coil woofer

I want to know, how measure the T-S parameters in a double voice coil woofer?

Puts the two voice coils in series, and measure it TS parameters
" " " " " " shunt, " " " "

I measure the TS parameters of a single voice coil, and connect each one to a channel of stero amplifier (equal signal in each channel, or dual mono), and i design a box of double of volume for connect the two voice coils (each one at one channel of amplifier, with the same signal!!!)


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Old 3rd February 2004, 04:32 PM   #2
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Hmm surely the best way to measure them would be the way you are going to use the driver??

If you intend to wire the coils in parallel then the theil smalls u want will be or the driver in parallel. For box purposes.
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Old 3rd February 2004, 05:31 PM   #3
Ron E is offline Ron E  United States
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Fs, Qes, Qms, Vas will be the same whether you connect in series or parallel.... Sensitivity will differ by 6dB, with parallel giving +6dB for the same voltage as series or just one connected coil.

Just go to:

Measure with coils parallel and you can see what happens if you drive with one coil and short (shorting R=0) or open (shorting R=10000) the second coil....or you can use a resistor with a value in between and see how Qts can be varied.
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