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Sorry, design of what? A speaker that uses them? That would be fun to me, but I don't know about someone else... in particular if I came up with the idea, you made it.
Mark,What’s the sensitivity of the combo planars?How low can the midrange planar be comfortably set with a crossover?Thanks,Michael
Hey, Michael -The tweeter is 92db efficient. 1.8 - 35k range.The midrange is 97 db efficient. Top end is 22k. As for the low limit that's tough. The engineer yells at me all the time about that. If you use the driver "as is", 'he' would suggest 700hz with a steep crossover slope. There are other options around that which require a pretty smart person who understands that any variance affects output etc... I can go into that separately. In any case, using a mid-bass driver of 10g MMS is absolutely seamless. Let me know if you need anything else on that.M
Mark,Is that 10g MMS exactly, up to 10g, or 10g or higher?Thank you.Michael
I would need exact specs.
Will you need to approve the mid-bass drivers? There are a lot of 5 in woofers less than 10g MMs. One example below. Are you OK with MTM format? Are we to purchase our own woofers for the design? Thanks, Duchttps://www.madisoundspeakerstore.com/approx-5-woofers/satori-mw13p-8-5-egyptian-papyrus-cone-woofer-8-ohm/
So no phase data or T/S ?
It's slightly hard to model without... Anyways.What I'm thinking.Tweeter crossed over at 8khz. 4rth order. It'll need some series resistance with it. How much I'm not sure, but I want to do like with the midtweet and try to push it towards current driven response a bit. 2ohm maybe? Midrange/midtweet 3rd order on both ends. Crossed at 8khz and probably about 1.2khz (?). The reason for this is I'd want to vent to the outside with tiny holes that could be drilled to make it aperiodic, and I know the low end is going to trail off so it needs to be high enough to prevent that (I'd go lower if it could, to 1khz). It'll provide some extra damping. This is good because I want to put a fair bit of resistance in series with it. This will have to be tuned by ear most likely. But the intention is to move it into being more current driven, and let more of the physical properties steer it. For a midbass I'd use the Zaph ZA14W08, 2x per speakers. I'd use them in bipole. Because I'd have them ported and running aperiodic in parallel (crazy I know, the port gain isn't terribly important). I'd expect it to run maybe into the 40hz range with a sensitivity around 87db (it'll need some BSC like crossover work because the gain from the room will be too much). The ape vent can be on the top, and the port out the back above the woofer. The box would have a little bit of an L shape in a way because the tweet/midtweet would be mounted on the front without being inside the box, to let the mid run aperiodic.I could be totally wrong about the whole thing but... just an idea. I think it might be fun on a tube amp. It'd sound serious gusto, and hopefully pretty articulate without a bunch of feedback.
I’ll take your word on the 7.5k! Probably worth bumping to 7k due to the crossover type.I want the midtweeter to meld well with a pattern that isnt like LR4, so I would remain 3rd order (see YG speakers) The thing is at these frequencies it’s mostly irrelevant because they are shirt it’s imperceptible. Phase is a moving target. Up in this range you’re going to just be trading a set of frequencies in phase for another set that were out of phase previously. Besides it won’t be anymore off than a single cap speaker is, 90*. The only thing particularly key is that the overall phase doesn’t reverse and tends increase. The big concern is comb filtering. I’d use an elliptical/notch on the tweeter/woofer first attempt to reduce some comb. I’m not opposed to other woofers but the Zaph might be one of the few to keep up with the mid-tweet. It also has the right QTS you can’t find in pro drivers usually. By shelving off response it’ll play pretty darn deep! Bipolar tends to sound very robust in the bass. But I admit I’m thinking bookshelf. Otherwise probably add a bass driver in bipolar setup, and reduce the Zaph to one and no port just ape. But a bipolar TL might be a good small floor stander.
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