Posted January 7, 201510 yr Picking up 2 d2 sp4 18s to put on my taramps 8000...with these having odd coils how much are we talkin the amp will put out on these things?
January 7, 201510 yr The RE, yeah, but That's not weird at all. They're either dual 1 or dual 2. Don't worry about it.
January 7, 201510 yr Additionally, you enclosure is going to be what dictates your impedance. The Re of the coil will relate to little of your overall impedance. Without knowing what the enclosure impedance is, you will have no idea how much power the amplifier is producing. You can attempt to measure the output power of the amplifier with an RMS voltmeter and inductive current probe (clamp) but you would have to do it over a wide range of frequencies to be meaningful and count on the test equipment being accurate...
January 7, 201510 yr To give you an idea of what I am talking about, attached is an impedance plot. If you notice, there is only one point where it drops to the Re of the driver, everywhere else it is higher. Also, it isn't "Box rise" , that is a made-up term because impedance both rises and falls...
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