Questions on building Orion Crossover?

[¿GotJazz?]

I'm building an Orion-based surround system, with two full Orions for the mains, and 3 Orion upper baffles (T & M only) for the surround channels.

I would like to build the 5 Orion crossover boards inside one enclosure and one power supply, if possible.

I have a few questions:

1) Can I put all 5 Orions ASP boards in one enclosure without any heat build-up problems?

2) Does anyone know the maximum expected +12 V & -12 V current draws for a single Orion ASP board (Or more importantly - a single power supply that can comfortably power all 5 boards)?

3) Any suggestions for an enclosure that would easily hold all the boards?

[john k...]

(JPK) Not an answer to your question, but I can see you are going to have rather a lot of amplifiers to pull this off. So I though I'd throw this out before you get too far into your project. Have you considered my NaO design? The Mid/tweeter panel uses a passive crossover which would mean you would need only 7 channels of amplification total for 5 panels and two woofer system. The active circuits are much simpler too. Just a thought.

http://www.geocities.com/kreskovs/NaO.html

[Zodiac]

Originally posted by ¿GotJazz?
I'm building an Orion-based surround system, with two full Orions for the mains, and 3 Orion upper baffles (T & M only) for the surround channels.

I would like to build the 5 Orion crossover boards inside one enclosure and one power supply, if possible.

I have a few questions:

1) Can I put all 5 Orions ASP boards in one enclosure without any heat build-up problems?

2) Does anyone know the maximum expected +12 V & -12 V current draws for a single Orion ASP board (Or more importantly - a single power supply that can comfortably power all 5 boards)?

3) Any suggestions for an enclosure that would easily hold all the boards?

I am buiding some Orions, here are my thoughts:

1) Don't see why not, it is not like they are class A amps
2) I can check this for you as I have built a board, I will try and post tomorrow. Otherwise check the opamp datasheet and multiply by the number of opamps
3) No idea, finding a cheap and nice enclosure is a big challenge. Try Teko, their Dissipator line is OK www.teko.com or www.elfa.se have some nice enclosures

[Davey]

Gotjazz,

You can assume about 9mA for each OPA2134 (if you use those) so multiply by the number of devices and you'll be pretty close. There's eleven op-amps on each board...times five...gives you about 500mA total. You should be conservative and find a power supply that will source probably double that.

This sounds like an elaborate project. I'm not sure I would go that route, but I'm here to help if you need assistance assembling/testing the boards.

Cheers,

Davey.