Re: Scaling way back! Lots of questions
Posted: Mon Jul 27, 2020 4:45 pm
Thought I'd mention that, for no good reason, I am a fan of 8" drivers. I'd love for you to build a pair of OT8's!
Loudspeaker Design
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I agree.Grant Bunter wrote: βMon Jul 27, 2020 4:19 pm I reckon you should remove the Jacks from the decision.
Bi amping will just add complexity and unneeded amp channels to the system, no benefit in doing so... that's what Bill always says anyway. However, I understand the urge to do it anyway. Because, sometimes, we just want to. Won't hurt the sound. Just more setup and kit to haul.
SPL is SPL, the source doesn't matter. Sensitivity and driver displacement matter. Just don't screw it up like the guy in that OTop 8 thread where he used totally out of spec drivers that weren't even suitable for a ported box, let alone a horn.
Is the off axis coverage between the OT8 & OT12 for all intents and purposes close enough to not be concerned with?Bill Fitzmaurice wrote: βMon Jul 27, 2020 5:20 pmSPL is SPL, the source doesn't matter. Sensitivity and driver displacement matter. Just don't screw it up like the guy in that OTop 8 thread where he used totally out of spec drivers that weren't even suitable for a ported box, let alone a horn.
Melded array is melded array.....flat it flat.....CD horn is CD horn. The box in this case won't change that.SethRocksYou wrote: βMon Jul 27, 2020 5:45 pmIs the off axis coverage between the OT8 & OT12 for all intents and purposes close enough to not be concerned with?Bill Fitzmaurice wrote: βMon Jul 27, 2020 5:20 pmSPL is SPL, the source doesn't matter. Sensitivity and driver displacement matter. Just don't screw it up like the guy in that OTop 8 thread where he used totally out of spec drivers that weren't even suitable for a ported box, let alone a horn.
I get that with the tweeter section. Makes all the sense in the world.Bruce Weldy wrote: βMon Jul 27, 2020 6:11 pm
Melded array is melded array.....flat it flat.....CD horn is CD horn. The box in this case won't change that.
The lower the frequency, the wider the dispersion. Everything below the tweeter section should be as wide or wider than the tweeters.SethRocksYou wrote: βMon Jul 27, 2020 7:06 pmI get that with the tweeter section. Makes all the sense in the world.Bruce Weldy wrote: βMon Jul 27, 2020 6:11 pm
Melded array is melded array.....flat it flat.....CD horn is CD horn. The box in this case won't change that.
More specifically, the dispersion angle of the mid range. Enclosure width wouldn't matter? I don't know, that's why I ask. Joe's question raised the curiosity for me, if that would change anything one way or another... or not at all. I know driver size in direct radiator tops effects dispersion angle, but I think that may be an effect of the cone angle, or something to that effect. But, again, I don't know for sure.
Hi Bruce
Howdy Young Fella....
It does. The narrower the enclosure the wider the dispersion. This applies down to the frequency where the enclosure width is one wavelength. At that point dispersion is 180 degrees. Below that you lose axial output, because the dispersion is wider than 180 degrees, so this sword has two edges.SethRocksYou wrote: βMon Jul 27, 2020 7:06 pm More specifically, the dispersion angle of the mid range. Enclosure width wouldn't matter?
That's super interesting. Thank you Bill.Bill Fitzmaurice wrote: βMon Jul 27, 2020 9:11 pmIt does. The narrower the enclosure the wider the dispersion. This applies down to the frequency where the enclosure width is one wavelength. At that point dispersion is 180 degrees. Below that you lose axial output, because the dispersion is wider than 180 degrees, so this sword has two edges.SethRocksYou wrote: βMon Jul 27, 2020 7:06 pm More specifically, the dispersion angle of the mid range. Enclosure width wouldn't matter?