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I've been thinking of getting a second CC3 to stack on top of the one I have. But how do you attach them together? The stock 1/4-20 inserts don't seem to be right for that. Besides, I don't think the top has a set of inserts. Has anyone done it or seen it done?
Thanks, all.
~Ken
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I'm not sure what the results would be if you did that. The drivers are arrayed horizontally, so you're presumably going to get vertical Venetian blind lobing. I'd suggest you check first with Wendell at Magnepan.
My memory's a bit vague, but I remember one of the reviewers at either TAS or Stereophile having a Magnepan reference system with a stacked center. And Mart appears to enjoy his. But he has CC1's which might have a different layout.
By the way, does anyone know of a picture on the web of a naked CC3? I haven't been able to find one.
Addressing your caution about venetian blind lobing, is the CC3's tweeter biased to one side or another? If so I could mount two with their tweeters near each other. I see lots of center channel speakers with a symmetrical arrangement of drivers (mid)(treble)(mid). So the lower range apparently doesn't venetian blind.
But please comment. I have seen a bit. But I don't have any experience with this, beyond knowing that one CC3 gets overwhelmed by two MG-III's beside it.
~Ken
Full frontal
And some back side nudity as well
Many thanks, Grant. Is that barely seen division of the panel about 1/5 of the way from the top the divider between tweeter and mid?
But is the CC3 not a 2-way? Pretty sure the middle upright is the tweeter.
I dug up the CC3 manual to see what it reveals. Magnepan calls the CC3 "a curved, two-way planar magnetic driver". And the specification lists a "Quasi Ribbon Tweeter Size: 31" x 2-1/2"". That would be about right for that upper section.
You are correct, too many things in my head today (2 men short of 5 at my day job where I am right now). Sorry.
I haven't seen a naked picture either, so I'm not familiar with the layout. If it's like the floor-standers, the tweeter segment is to one side to minimize IM. So you could do what you want, but you'd still get some vertical lobing and impaired vertical dispersion, both in the highs and quite possibly the midrange as well.
The rule is always that the dimension of the driver has to be < 1 wavelength or the driver will start to beam in that direction.
The MTM arrangement is a good one, but driver size, spacing, crossover design, and height are all taken into account when designing an MTM speaker. An MTM speaker will be designed to throw its lobe forward, it's inherently symmetrical. Center speakers are below the screen, so you'd be at an angle from the main lobe with results that could vary depending on crossover slopes and driver size. I'm guessing that Magnepan chose its crossover to optimize response a bit off axis, taking into account the fact that the listener will be listening above the midrange/tweeter axis.
Unless someone can fill you in on the basis of personal experience, I still think your best course is to ask Wendell. Otherwise, you could just try it, but with no guarantee that it will work. Also, what about the tri center? All you'd have to do is add two wall-mounts on either side. My understanding is that this eliminates the "bow tie" effect that comes from using a center channel speaker below the screen, while maintaining the center image stability from having a physical driver there and improving the perception of layering and depth.
I don't think the tri-center would pass The Committee. A stacked center might even be vetoed. But I think it has a better chance.
The center channel speaker is behind an acoustically transparent screen, so placement can be pretty ideal. And Magnepan suggests pointing the speaker directly at the listeners' ears. So I think it's designed to be on-axis.
How do I contact Wendell? Does he share an email address?
Thanks for commenting. It helps my thought process.
Could you put the on-walls behind your acoustically transparent screen? I don't think they come out very far.
Based on experience, the best way to contact Wendell for a technical question like this is to call him at Magnepan.
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