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Hey,

It's the 30904 bridging network which is supposed to bring the different efficiencies of the HF and 411-8a closer together. I've never seen the schematics for that. I'd like to see it myself...

I haven't heard this in a long time, but it simply touches many different genre in one song; Well, I guess with Zappa it's a movement. But, it's still not as good as the LP version:
...

Here's an update to this project:

This weekend was time to put all the pieces/parts together that were ordered and remove the old crossovers (N800-D).

* Installed biamp binding posts direct to...

My thought about your comment on the HF gain, is I thought because of the 11db efficiency difference, the woofer is less efficient, that I should reduce the gain of the horn by 11db to make them more...

Here are a couple of images of the settings for HF and LF. I'm wondering if I should set these so that they stay to the limits of the drivers capabilities, even at it's lowest roll off point or set...

Corrections to the original thread:

Altec 411-8A Woofer drivers:
Pressure Sensitivity:
93db SPL with 1 watt input of band-limited pink noise from 250 Hz to 1000 Hz measured on axis 4’ from...

I’m going to try bi-amping for the first time with some DIY Altec Santiago speakers I’ve recently acquired because of the current crossovers (N800-D) don’t have any control over the efficiency of the...

I'm investigating the possibility of NOT replacing my current Altec N801-8A network Xover/attenuator and going with active crossovers. The reason is for more control over my current 2 way Altec...

I currently have a 811B horn with 806A driver and a N800-D network. I want to change out the network and HF driver to make everything 8 ohm as the original speaker specs for Altec Santiago's were. To...

I've decided to make these more inline with Santiago's since the dimensions of the cabinets are to spec of Santiago's, but with an upgrade on the HF driver. I'll replace the 806a's with 902-8B's and...

I recently bought these Santiago's from out of state and I'm starting to
realize these are actually DIY Cabs and some VOTT speakers thrown in. I
was excited to hear them since they were out of...