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Multi-Way Conventional loudspeakers with crossovers

Multi-amp thought experiment
Multi-amp thought experiment
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Old 12th February 2019, 10:44 PM   #21
Moondog55 is offline Moondog55  Australia
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Quote:
Originally Posted by 00940 View Post
Knowing what you have, especially wrt woofers, would really help to narrow down options. I really like the satellites plus small subs idea but if you don't have the drivers for it...

Knowing the intended use and the size/shape of the room would also be a big plus.
That's the thing I already have the speakers for stereo use and I don't "need" anything, so the build would be simply for fun and experimentation and as a learning exercise in the use of DSP.
One of the thoughts I had is to replicate something Lynn Olsen posted on at the start of the Beyond the Ariel thread. Multiple woofers with first order roll-offs at each octave step, something that was impractically impossible at a cost effective level for me .
So first step at 80Hz, next at 160Hz and a final roll-off a steeper level at the XO to the midrange/tweeter Just to see if it sounds as Lynn said it should, excellent low bass
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Old 13th February 2019, 12:18 AM   #22
rabbitz is offline rabbitz  Australia
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Thanks for that Bon. The use is a small sub < 60Hz.
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Old 13th February 2019, 07:52 PM   #23
Bon is offline Bon  Australia
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The use is a small sub < 60Hz.
I highly recommend using two in force cancelling mode. Use 10" (250mm) or 12" (300mm) drainage pipe with woofers in end. A rigid pipe is incapable of "pumping" due to internal pressure. The end baffles can be made thick and glued into the tube. The tensioning rods the hold them firmly in place. I had a saucer of water balanced on the tube with high level sub 20 Hz tones. Not a ripple when the walls, doors and windows were flexing madly. The volume is your choice but I found 60 cm pipe length (400mm diameter) was perfect for 2x12". An internal mdf central disc brace was glued in but I don't really think it was necessary. The best sealed sub I have ever built by a long way.
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Last edited by Bon; 13th February 2019 at 07:53 PM. Reason: Typo
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Old 13th February 2019, 11:37 PM   #24
rabbitz is offline rabbitz  Australia
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Reminds me of the sonotube subs that were being built a decade ago.
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