Abbey Road Style monitors: Altec 612 cabinets/615B drivers

[eso]

I almost built something without extreme mission creep... Almost.

The idea was to build a quick pair of 612 cabinets for some 615B drivers (605 with different horn marketed as a ceiling mount). Everything was going smoothly until I remembered a schematic for a time aligned network specific to the 605... everything went off the rails from there. Needing cap <1% in odd values meant grouping caps to get values. That turned into potting the caps... Because the circuit is similar to the Urei networks I added the fuses for protection and the BNC connector for the conductor compensation circuit.

I eventually made it back to earth, and these sound fantastic.

eso

[Earl K]

Beautiful Work, That-There !! :D :hurray: :D

I'm particularly impressed when a crossover is able to camouflage itself as a small oil-refinery. :applaud: :eek: :applaud:

MASSIVE!!! ;)

https://www.audioheritage.org/vbulletin/attachment.php?attachmentid=92489&stc=1&d=1706029102

EarlK

[Odd]

Yes, very nice.

[Robh3606]

Those look great!!!! Those caps remind me of the old potted JBL caps. What did you use as potting material??

Rob :)

[eso]

Those look great!!!! Those caps remind me of the old potted JBL caps. What did you use as potting material??

Rob :)

It's a black urethane resin. Have to pot them in several small lifts to keep from creating too much heat. Used mailing tubes for the forms.

eso

[rusty jefferson]

As long as our OCD doesn't effect anyone negatively it's okay with me. :-D

Like all your builds, they look great.

[Mr. Widget]

As long as our OCD doesn't effect anyone negatively it's okay with me. :-D

Like all your builds, they look great. +1

On both counts. Well done!


Widget

[turnitdown]

Beautifully done.

[DerekTheGreat]

Yeah, great job! Those cable runs are nice and tight, I dig the insulation you used as well. It does look like a scaled down refinery!

[Ian Mackenzie]

I hope all the cables are cut to the same length? Everything matters with audio.