Wayne Parham Messages: 18752 Registered: January 2001
Illuminati (33rd Degree)
The Altec 811 creates a pattern that narrows as frequency rises. So it shouldn't use the same kind of crossover. Specially, the values for R1, R2 and C1 won't be appropriate for the 811. A straight attenuator or L-Pad is going to be more suitable.