[Voiceray]

No.

Do you think this mid range driver would crossover well within its range?

http://aeronet.com.au/atc.htm

[TRADERXFAN]

Final setup with all 3 subs and OB grills finally done and installed.  I think the grills were the hardest part of the whole project - ugh, but done feels (and sounds) good.

Hey Tom.
Congrats.
I have yet to make grills for mine. What did you do? How is it attaching to the cabinet?  (Apologies if you have explained this already, I didn't see it)
I take it you did not run a stringer or anything along the inside of the cabinet, did you?

-Tony

edit** ah, now I see from your closeup that you had an inner wall with some surface to mount a magnet or velcro tab to hold the grill...

[TomS]

6 of those 1/4" magic magnets embedded into the grills and the cabinet edges.  Serious stick, even through the cloth layer.  I even have unique left and right grills because I put one set in backwards from the other 

[drphoto]

Tom, I have questions about the wiring too. Did you solder the leads to the drivers?

How did you handle the wiring harness for the amp? Wondering if you used the supplied connector, then replaced the wires that run out to your Speakon?

Mine are still on hold, as I have to get the baffle shaved down a bit.

Thanks.

joe

[TomS]

Joe,

I soldered all of them directly to the speaker terminals.  I also clipped the leads on the 4 amp wires and soldered those to the Speakons mounted in the wood amp case.

Tom

[drphoto]

Ok, Tom, one more wire question. What did you run from the amps to the speaker connectors? Did you run the same type of wire for the servo as the driver? I have some unused Kimber 8TC I thought might work for the driver and then a 'generic' 14 ga speaker wire for the servo. Or should it be the same?

Thanks again.

Nice job on the build....those look great. Love that bamboo. Hope to do my balcony (listening area) floor in that.

 Any chance you could get Dr. Geddes over to hear your setup? As I understand, he demos his speakers using fairly low end electronics. Be interesting to see what he thinks of them w/ something like the Atmospheres, which in my mind is probably the gold standard of amps.

[TomS]

Ok, Tom, one more wire question. What did you run from the amps to the speaker connectors? Did you run the same type of wire for the servo as the driver? I have some unused Kimber 8TC I thought might work for the driver and then a 'generic' 14 ga speaker wire for the servo. Or should it be the same?

Thanks again.

Nice job on the build....those look great. Love that bamboo. Hope to do my balcony (listening area) floor in that.

 Any chance you could get Dr. Geddes over to hear your setup? As I understand, he demos his speakers using fairly low end electronics. Be interesting to see what he thinks of them w/ something like the Atmospheres, which in my mind is probably the gold standard of amps.

I can't remember the exact wire size, but I used the same wire inside my umbilical, about 14g on the voice coils and maybe 20g on the servos.  It is silver coated copper in teflon, just sleeved in techflex.

I don't think Earl is going to visit anytime soon.  He's quite at peace with the performance he gets at his own place

[poseidonsvoice]

Any chance you could get Dr. Geddes over to hear your setup? As I understand, he demos his speakers using fairly low end electronics. Be interesting to see what he thinks of them w/ something like the Atmospheres, which in my mind is probably the gold standard of amps.

drphoto,

You know, I've thought the same thing, except Earl's room is absolutely fantastic. I was very satisfied with the performance he was getting on 'low end' electronics. We are currently building a new home going with the exact specifications of Geddes' room from his book and I want to really see how much or how little difference electronics make. I have a feeling there are differences and that a better room will only exemplify rather than cancel out those differences but we shall see.

Anand.

[ga foo 88]

I really like the concept of having your mains sitting on top of the OB woofers.  This may seem like an odd question since most folks are using very efficient pro drivers as mains with flea powered amps and the servo subs obviously require rhythmik plate amps, but what is the efficiency each pair of servo's in the h-frame?

[Voiceray]

I really like the concept of having your mains sitting on top of the OB woofers. 

Your mains sitting on top of the OB woofers.
With the ribbon tweeter having less vertical dispersion and the sitting position being below optimum with the crossover at 200 Hz, could the "H" be "I" or on it's side.  If not, maybe a 5 degree slant of the "I" up and slant for the ribbon tweeter down.  What would be the best solution?   

[Danny Richie]

but what is the efficiency each pair of servo's in the h-frame?

It really doesn't matter as the servo subs have their own amp and gain control. With a turn of the knob they can be anywhere you want.

Technically with a pair of these in parallel: http://www.gr-research.com/index.asp?PageAction=VIEWPROD&ProdID=141 You are looking at about a 90db sensitivity.

With the ribbon tweeter having less vertical dispersion and the sitting position being below optimum with the crossover at 200 Hz, could the "H" be "I" or on it's side.  If not, maybe a 5 degree slant of the "I" up and slant for the ribbon tweeter down.  What would be the best solution?

I don't think he has a ribbon tweeter. I think that is a compression driver with a piece of foam in front of it.

The best way I know of to use these subs in an H frame, plus keep the top portion at a perfect listening height is to build the V-1 or Super-V. 

[TomS]

...I don't think he has a ribbon tweeter. I think that is a compression driver with a piece of foam in front of it.
...

Correct.  B&C DE-250 compression driver in a precision waveguide, about 95db efficiency for the system, so just turn the sub gain up a bit.  The height of the driver to listening position is no problem at all for these as they sound terrific.

[Voiceray]

I don't think he has a ribbon tweeter. I think that is a compression driver with a piece of foam in front of it.

The best way I know of to use these subs in an H frame, plus keep the top portion at a perfect listening height is to build the V-1 or Super-V. 

My apologies,  I quoted only the mains on top of the sub to find out how a ribbon would be placed.
I didn't want to start another thread since the title of this thread is perfect.  If not putting the "H"
frame on it's side would be an option.  How would I place a ribbon on top of the "H" frame in order to receive a good vertical dispersion while sitting.   

[Danny Richie]

So you are wanting to use the open baffle subs with a ribbon tweeter ONLY?

[Voiceray]

So you are wanting to use the open baffle subs with a ribbon tweeter ONLY?

I would like the combination of your sub with the Neo10 and the Neo3, but that will be sometime in the future.  The prospect of combining the sub with a mod MMG, with new crossover and new frame is due-able now, but vertical dispersion while sitting is a problem.  Thirty-three inches is a bit high for it.  I was just finding ways to modify it so sitting and standing would work; although, probably only sitting will be workable.     

[Danny Richie]

Oh, I gotcha now.

They would match up well with some of those speakers.

[JDUBS]

Tom, would you mind telling me how you wired the woofers?  Not what wire goes where, but do you have a hole in the baffle where you run the wiring between the woofers?

Thanks,
Jim

[TomS]

Tom, would you mind telling me how you wired the woofers?  Not what wire goes where, but do you have a hole in the baffle where you run the wiring between the woofers?

Thanks,
Jim

Jim,

I'm away from home for a few days, so can't look at the moment. I'm pretty sure I just went through the baffles.

Tom

[JDUBS]

Jim,

I'm away from home for a few days, so can't look at the moment. I'm pretty sure I just went through the baffles.

Tom

That's what I am going to do, too.  Thanks, Tom.

Jim