How to cramp two pairs of GPA 515C into a small living room?

[jasminphotography]

Hi:
First of all I like to apologize for my poor English, because I am from Asia. I need all the help I can get. Here is the story. I used to live in a big house with a large living room, so I was thinking of building my self an altec system. I bought two pairs of GPA 515C, a pair of GPA 288H and a pair of 311-90 altec horn from e-bay thinking that I was well prepared for this project. Unfortunately, I was in a job relocating before I can start my project, and after a few months of relocating, I ended up in a new city, living in a not so big apartment with a tiny living room (compared to my old living room). I have all my components shipped to my new place and now I do not know what to do with them. My question now is, should I drop everything that I have and start with something smaller such as GPA 604? Or can I find a way to cramp what I have into a existing living room and still have a descent sound? My current living room is about 4.8mx4.2xm. Any help is much appreciated. Thanks,

[DSauro]

First of all, no need to apologize, as you English is quite good.
You didn't mention cabinets.
I would never tell anyone with the great component collection that you have to drop them, and start over. I once had two 817A cabinets, each with two 515LF's, and a 288G/511E mounted atop of each. Not much different than what you have. All of that in a 5.5M x 4.0M room. Also, not much different. While not nearly ideal, the sound was Altec clear & very good........for me, and all my neighbors. This was, however, not in an apartment. 210, or 211 cabinets would probably not be suitable, especially with other furnishings. It can be done with the right cabinets. If your occupation causes you to move again, it may be to a larger space. Keep them, imho.

[GM]

Greets!

Build ~320 L net triangular corner cabs with the drivers side by side and shifted up to be as close to top as practical and mount the 311 on top. Typically you want the 311's horizontal center-line to be at seated ear height or a little higher.

Try them sealed and if the bass is too 'lean', then get back to us for some venting ideas, so design the cab to have a removable panel for adding a vent if need be. A ~ 7" high, full baffle width removable gasketed panel should be big enough.

GM

[Cal Weldon]

Hi:
GPA 604?

I don't think you would be happy with those in a nearfield situation. I know I'm not.

GM, what do you think about running them Isobaric using the stacked method. He doesn't need a whole lot in his small room and the cabinet size might be really attractive.

[GM]

Well, I don't know if nesting a front vent driver up near another's motor will cause enough overheating to raise its Qts enough to put it out of sync with the front driver or worse, cause VC damage. Turned magnet to magnet takes up more space and worse, lowers the isobaric loading, so cab design theory will typically yield a smaller than optimum net Vb.

If vented, it will need to be 5-6x longer than for a single driver, further negating any box reduction, though for sure it will be considerably smaller than the ~320 L I propose.

Then there's the issue of the driver's outputs becoming increasingly out of phase with increasing frequency, so the back driver will need to be rolled off ~ an octave above Fb for wide BW use.

I guess if there's the time/inclination/$$$ to experiment it might be worthwhile, but in the scheme of things it seems better to me to just build the biggest sealed cab that can be tolerated and use a LRT ckt. to EQ it ~flat in-room if large corner loaded cabs aren't an option. The downside though is that if he's using flea power, then this may eat up too much efficiency.

GM

[jasminphotography]

Hi:
Thanks for all the replies. I believe triangular cabinet is out of the question, GM. My living room does not have perfect corners to place triangular cabinets. To be honest, I really want to use the components that I acquired from Bill. So, the question will be cabinet selection. Can you folks recommend cabinet designs that can be used in a relatively small living room with double woofers and still sound descent? Thanks,

[GM]

Greets!

You're welcome!

Ok, so? http://hifilit.com/hifilit/Altec/1959-l.jpg

Small room, large room, my suggestion remains valid. Another would be an MTM, so each 515 in ~160 L net spaced apart vertically just enough to slide the 311 in-between them or make a box for the 311 and stack them.

GM

[jasminphotography]

Hi, please pardon my ignorance if my next question sounds stupid, GM. I am not familiar with the term 320 L triangular corner cab. Is it the same as 830A cabinet and/or laguna cabinet? Also, if I stack the 311 on top of the cabinet, wouldn't the horn be facing each other? And with my small living room, will I be able to create a wide enough sound stage? Thanks,