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27th September 2020, 06:55 PM
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#1 |
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diyAudio Member
Join Date: Apr 2011
Location: Oceanside Ca
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Midrange experiment with Auto sound panel deadener and high density acoustic felt..
Boy, that took a while. Around 60 individually cut pieces per box, and filled to the brim. It’s so full that the drivers actually sit Securely at the height they’ll be mounted at, and the felt continues all the way to the back of the speaker. The baffle will be made from two layers of 1/4” maple, with a central layer of sorbothane, and mounted to the speaker with sorbothane gaskets. crossover points will be 500hz and 2.5khz
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It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain Last edited by Remlab; 27th September 2020 at 07:23 PM. |
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27th September 2020, 07:32 PM
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#3 |
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diyAudio Member
Join Date: Apr 2011
Location: Oceanside Ca
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The baffles are yet to be made (The baffle parts haven't arrived yet) , but measurements will come in a couple weeks
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It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain |
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27th September 2020, 09:19 PM
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#4 |
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diyAudio Member
Join Date: Apr 2011
Location: Oceanside Ca
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Drivers being used. The spec sheet states 84db on the mids, but they have been consistently measured by several users at around 87db, which is a much more usable efficiency rating. It actually makes sense because all of the other Peerless HDS drivers using this motor measure around 87 to 88db. Anyway, as you can see, it's extremely pistonic within it's operating range.
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It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain |
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28th September 2020, 05:44 AM
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#5 |
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diyAudio Member
Join Date: Oct 2009
Location: Wellington, New Zealand
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What are you using for the bass driver?
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28th September 2020, 04:18 PM
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#6 |
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diyAudio Member
Join Date: Apr 2011
Location: Oceanside Ca
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All peerless HDS based system(Not the midrange and tweeter you see here), Actually, the subs are Peerless XXLS but have the same cosmetics.
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It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain |
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28th September 2020, 08:41 PM
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#7 |
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diyAudio Member
Join Date: Apr 2011
Location: Oceanside Ca
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I actually love what's on top right now, but I had these other things sitting around, so what the hell, I may as well see if I can outdo it. The Scanspeak 10f/8424 needs a little more EQ in it's passband than I'm comfortable with. I'd like to see if I can get a flatter midband response without the tweeking from my current project. I may also go with two layers of 1/4" aluminum plate with a constrained layer of Sorbothane instead of the maple I wrote about earlier, because the 1/4" maple just wont be rigid enough for what I'm trying to achieve
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It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain |
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6th October 2020, 03:13 PM
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#10 |
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diyAudio Member
Join Date: Apr 2011
Location: Oceanside Ca
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I have two more 1/8” aluminum Top plates coming(Equal to the outer dimensions of the speaker), so with the sorbothane, each baffle will be four layers and 3/4” thick.
__________________
It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain Last edited by Remlab; 6th October 2020 at 03:17 PM. |
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