With lots of help from posters on the site, I put together this modular three-way top for small outdoor concerts. It's still a work in progress, but so far I'm thrilled.
It's a 3 inch compression driver, a 10 inch cone and a 15 inch cone. The 10 inch is from an EAWKF 650, and the 15 inch is from a bag and TA 15. I have attached PDFs of what multiple sources have stated are the closest equivalents to those drivers in aftermarket gear.
It occurred to me that the TA 15 I got the 15 from was crossed over at the same point the 3 inch compression driver crossed over, so for smaller shows I could bring a two-way speaker, the main drawback being that a 15 inch will be beaming for the upper frequencies. But it worked pretty well for shows where there was small audiences and limited budget.
The other day I noticed that the specs on the 10" driver, which actually weighs more than the 15 inch driver (it's a beast!), is rated to go down low enough that I could create a two-way system with a top two components crossed over at say 120 Hz.
With some planning and effort, I can pull the equipment out of storage and find somewhere to test it outside of a gig, but I still felt like I wanted to ask advice, in case either it was categorically doomed to fail, or if I'm taking a chance of some sort of long-term problem if I take this route.
it feels very counterintuitive to me, replacing a 15 inch with a 10 inch, but again, this 10 inch weigh more than the 15 inch and has amazing specs for excursion and says it can cover the frequency range.
So please share opinions about whether this is something worth exploring (or avoiding it all costs 🤣).
It's a 3 inch compression driver, a 10 inch cone and a 15 inch cone. The 10 inch is from an EAWKF 650, and the 15 inch is from a bag and TA 15. I have attached PDFs of what multiple sources have stated are the closest equivalents to those drivers in aftermarket gear.
It occurred to me that the TA 15 I got the 15 from was crossed over at the same point the 3 inch compression driver crossed over, so for smaller shows I could bring a two-way speaker, the main drawback being that a 15 inch will be beaming for the upper frequencies. But it worked pretty well for shows where there was small audiences and limited budget.
The other day I noticed that the specs on the 10" driver, which actually weighs more than the 15 inch driver (it's a beast!), is rated to go down low enough that I could create a two-way system with a top two components crossed over at say 120 Hz.
With some planning and effort, I can pull the equipment out of storage and find somewhere to test it outside of a gig, but I still felt like I wanted to ask advice, in case either it was categorically doomed to fail, or if I'm taking a chance of some sort of long-term problem if I take this route.
it feels very counterintuitive to me, replacing a 15 inch with a 10 inch, but again, this 10 inch weigh more than the 15 inch and has amazing specs for excursion and says it can cover the frequency range.
So please share opinions about whether this is something worth exploring (or avoiding it all costs 🤣).
Weight of a driver hardly relates to max SPL, especially at lower frequencies. The RCF also is a typical mid driver with high efficiency and poor LF response. So: no way. Read yourself in on Volume displacement.
Nothing amazing about drivers with ~3mm excursion, double that is common, +6dB more output.
Your low mid horn won't provide any gain at 120Hz, so output is dictated by excursion.
Assuming sealed cabinets, excursion limited output is ~112dB for the 10, 117dB for the 15".
5dB is a lot, you'd need near two of the L11-750YK's to equal the output of the 15-C.
Art
This all agrees with what my gut was telling me. I'm an experienced Sound tech but a noob at Speaker design. higher up on the specs there is a "Max excursion before damage" of 40mm, which seemed like a crazy large amount, honestly it seemed impossible. I don't know what the hell that number is but I see the number you're pointing at now
this is why I thought it would be smart to reach out before I went to the trouble to do this whole big testing process just to verify what my guy was telling me.
Thanks both of you for taking the time to respond
this is why I thought it would be smart to reach out before I went to the trouble to do this whole big testing process just to verify what my guy was telling me.
Thanks both of you for taking the time to respond
40mm might be possible as a peak to peak figure just before damage, but seems high considering the voice coil length and magnetic gap are only 9mm. The voice coil would be 11mm out of the gap at 20mm..
Anyway, you can test Xdamage/Xlim by pushing the cone by hand.
The Kappa 15 has an Xlim of 11.6mm, 23.2mm peak to peak.