Posted by Kim Schultz [ 195.212.29.67 ] on February 26, 2008 at 15:18:26:

In Reply to: Never! posted by Wayne Parham on February 24, 2008 at 19:05:47:

Hi Wayne.

I use Altec 902-16HF drivers in my front and center PI7 speakers, this is the normal 902 driver with a 16ohm voicecoil.

After playing around with Spice and measuring the driver with the crossover, I arrived with these values:

R1 = 33ohm
R2 = 12ohm
C1 = 0.22uF

This gives a load of about 9.5ohm on the crossover, where the normal lpad with the Eminence driver, gives a load of about 9.4ohm.

All good so far, but I really can´t seem to remember how to calculate how many db´s this lpad is damping.

Do you have another chart for 16ohm drivers on hand ?

I have another question regarding lpad with topend compensation.

After much consideration I have bought four Eminence Beta 8A drivers, and eight BMS4524 drivers with 18Sound XT120 horns for my bipole surround speaker project.

I will be running the BMS4524 drivers in series for a resistance of 14-16ohms.

Can I just use the same lpad as above (if the sound levels match), or are there a better way to do this ?

I was thinking of using a single coil on the woofer, and a third order crossover at about 2200hz on the hf drivers.

Btw, these drivers are excellent, they sound really nice and the horns are good too.

Replies:

• Correction - Kim Schultz 04:40:25 02/27/08 (6)
  • Now with measurements. - Kim Schultz 08:04:50 02/27/08 (5)
    • Re: Now with measurements. - Wayne Parham 13:48:37 02/27/08 (4)
      • Spice rules ;-) - Kim Schultz 15:03:21 02/27/08 (3)
        • Re: Spice rules ;-) - Wayne Parham 15:22:31 02/27/08 (2)
          • Re: Spice rules ;-) - Kim Schultz 16:07:41 02/27/08 (1)
            • Re: Spice rules ;-) - Wayne Parham 19:49:52 02/27/08 (0)