825 Build Questions

[gil393]

Thanks for all of the help. Sorry for not responding as I was out of town for a bit. These drivers were NOS from Lambda not AE. Long story short the original manufacturer and not the current. Also about half the price of the current drivers. Some say the cone mold is based on an Altec design, I don't know and it doesn't really matter. Basically, they were the best new 15" driver I could afford. The correct Altec LF drivers were too expensive and too risky given their age and the fact that I couldn't even get the horns shipped correctly.

I have quite a few air leaks to tackle, some bracing, and some port tuning. I will lower the crossover and try and figure out how to do some measurements. It may well be that the high crossover simply eliminates the 1-2K bump in response coming from the HF and thus sounds better. I can eq it flat digital or analog once I can measure. I'll also check phase but I don't have any time alignment capabilities other than phase and moving the horn back and forth.

Thanks,
Greg

[cradeldorf]

Thanks for all of the help. Sorry for not responding as I was out of town for a bit. These drivers were NOS from Lambda not AE. Long story short the original manufacturer and not the current. Also about half the price of the current drivers. Some say the cone mold is based on an Altec design, I don't know and it doesn't really matter. Basically, they were the best new 15" driver I could afford. The correct Altec LF drivers were too expensive and too risky given their age and the fact that I couldn't even get the horns shipped correctly.

I have quite a few air leaks to tackle, some bracing, and some port tuning. I will lower the crossover and try and figure out how to do some measurements. It may well be that the high crossover simply eliminates the 1-2K bump in response coming from the HF and thus sounds better. I can eq it flat digital or analog once I can measure. I'll also check phase but I don't have any time alignment capabilities other than phase and moving the horn back and forth.

Thanks,
Greg

My cones will be 60 years old next May and your eardrums will distort before these speakers will. Deafening would be an understatement.