904-8A speakers in the house

[Elitopus1]

I would recommend anything Jeff has designed. My Markwart 604G xovers sound great

Maybe you could salvage some parts from the original xovers. The coils and Lpads at least

[RonSSS]

I've spoken to Jeff about this.
The woofer of the 904 is different impedance than the 8K.
This is why I was looking for Clio impedance and freq response plots for the 904 a month or so ago.
Ron

[GM]

Hmm, historically the key points are 1.5 kHz, 2nd order low pass, 3rd order high pass and nominal 8 ohms XO, so is theoretically close enough unless it has a zobel, which the simplified XO doesn't, but I'm no computer aided XO designer, so looking forward to his thoughts.

GM

[SD-50]

I just finished Jeff Markwart?s simplified XO for my 604-8Ks and they are excellent, superior to the stock Altec XO. Using better parts as well, Solen coils, PIO and Teflon caps, mil-spec silver/copper Teflon wire.

- - - Updated - - -

I picked up the crossovers today. Pulled the cover off of one and boy do they look like a PIA to rebuild. They look similar to Model 19 crossovers in the layout but the aluminum panel is bent up on the end about 3" instead of being flat. Blocks easy access to the terminal strip. Add the mess of wires crossing over top of the terminal strips and most of the components are buried under a mass of wires.
There are two L-pads, three transformer type inductors, an EQ pushbutton switch with no less than ten wires and one jumper attached. Plus four ceramic resistors and five capacitors. Needless to say, it's kind of busy in that box.
I have searched for a schematic but can't find anything on the 904-8A crossover. Does anyone have one they could share?
Thanks

BillWojo

Rewire my 604-8k XOs with 16g Teflon mil-spec wire, PIA! Sounded much better after replacing the grotty stock wire, but not as good as Jeff Markwarts model.