Posted by Wayne Parham on January 08, 2003 at 17:30:33

In Reply to: Re: Four π implementation posted by Garland on January 02, 2003 at 18:12:26:

Here are lists of component values:

For an Altec 811 or other horn with collapsing directivity:

R1 - 1M
R2 - 1M
R3 - 1M
R4 - 91K
R5 - 100K
R6 - 100K
R7 - 22K
R8 - 1M
R9 - 89K
R10 - 18K
R11 - 1.3M
R12 - 1.3M
R13 - 22K
R14 - 1M
R15 - 3.3M
R16 - 3.3M
R17 - 220K
C1 - 0.22uF
C2 - 2200pF
C3 - 0.01uF
C4 - 270pF
C5 - 0.22uF
C6 - 2200pF
C7 - 2200pF
C8 - 2200pF
C9 - 0.22uF
C10 - 15pF

For a Peavey CH-3, Eminence H290 or Martinelli horn:

R1 - 1M
R2 - 1M
R3 - 1M
R4 - 75K
R5 - 83K
R6 - 83K
R7 - 22K
R8 - 1M
R9 - 150K
R10 - 33K
R11 - 2.2M
R12 - 2.2M
R13 - 22K
R14 - 1M
R15 - 3.3M
R16 - 3.3M
R17 - 220K
C1 - 0.22uF
C2 - 1600pF
C3 - 6800pF
C4 - 200pF
C5 - 0.22uF
C6 - 1000pF
C7 - 1000pF
C8 - 1000pF
C9 - 0.22uF
C10 - 10pF

The response curves look good so give those values a try and let us know how it sounds.