Posted by Super_BQ on March 15, 2002 at 05:05:10

Hello Wayne,

I'm curious on the accuracy of my Eminence Delta 15A woofer (used in Theater 4 Pi speaker xover). On their spec. page they show:

Coil Inductance (Le) = 0.86 mH
Coil Impedance (Re) = 6.9 ohms

Using the above, C5 = 18uF and R3 = 8.625

But when using my LCR digital multi-meter to measure the actual woofer I get:

Coil Inductance (Le) = 0.66 mH
Coil Impedance (Re) = 6.5 ohms

Using the above, C5 = 15.62uF and R3 = 8.125 ohms

Should I use C5 & R3 values that I measured with my LCR meter or should I just stick with say a 20mH inductor as mentioned from other previous posts? Is it that Eminence's specification shows a "nominal" value and what I get with my LCR meter will be different?

Brendon

• the past - dbeardsl 12:13:22 03/16/02 (2)
  • Re: the past - Super_BQ 01:22:11 03/17/02 (1)
    • Cool! - dbeardsl 01:36:10 03/17/02 (0)
• Re: C5 & R3 values - accuracy of driver - Wayne Parham 12:15:56 03/15/02 (0)
• Re: C5 & R3 values - accuracy of driver - dbeardsl 09:49:35 03/15/02 (1)
  • Re: C5 & R3 values - accuracy of driver - Super_BQ 06:23:17 03/16/02 (0)