Altec N1500A crossover rebuild

Forgot to ask what cab's do you have?

Also wondering if Great Plains Acoustics is still in business as aside from stock there was a custom crossover guy who used to post there.

DeKay

Big Red cabinets from Mastering Labs

Sorry, no source for a rebuild - just some pessimistic things to confirm. 

You have Mastering Labs cab's without the ML crossover and with the stock Altec N1500A's?

604E's came in both 8 and 16 ohm versions, so I would check that out if you do not already have the info.

I would also check the compression driver membranes to see what's in there.

The old Altec drivers drive me crazy (a bit) as there were quite a few variations as well as rebuilds not using original spec parts.

I've never seen or heard Big Reds, just 604's in other cab's including the ugly Gray ones with handles on the sides.

Have you joined the Altec User's Board?

https://www.hostboard.com/forums/forumdisplay.php?f=700

DeKay

Super Big Reds in furniture-grade cabinets, tri-amped (Marantz 1180DC for pre-amp and horns, Marantz 170DC s  for the 15"s) with one-off electronic crossover and eq units for the horns.

https://youtu.be/iGa9259pz-I

https://youtu.be/jsPePauUaLo

https://youtu.be/4MWmYYV1bg4

"Big Red cabinets from Mastering Labs"

Actually Mastering Labs made the crossovers, but AudioTechnica made the cabinets and distributed the speakers.