Loudspeaker Design
https://billfitzmaurice.info/forum/
Wherever possible, the cab dimensions should be followed.belzarrath wrote: ↑Mon Apr 24, 2023 12:49 am Its been awhile, Rodeos in Los Vegas and work. I am about to cnc my parts and wanted to check the tweaks I made.
I designed the cabinet to be 8" interior height vs the 7". Do I need make sure its 7". I believe I read in a post that the vas is not critical for this design.
If you omit the internal crossover, then you effectively start biamping mid drivers and high frequency. That means 2 amp channels per cab. If you go with the KAB 4 x 100, and use the internal crossover, then you could use 1 channel per cab to power it and handle cross points between the low frequency cab, and the SLA's.belzarrath wrote: ↑Tue Apr 25, 2023 11:33 pm Ok, next question while I'm waiting for the last one. Could i use a dsp instead of the designed crossover? Thinking about using Dayton Audio KABD-4100 4 x 100W. or simular amp to drive the bass and sla. Never used one of these and not sure of setup, so any help would be appreciated and needed.
It won't make any appreciable difference. The stock dimension is the shortest that will work. Since it's going to end up under a TV in most cases where space is usually precious I kept it as short as possible. I wouldn't bi-amp the SLA, it doesn't need enough power to justify the expense or complexity. Drive it, along with the L/R and surrounds, with an x.1 AVR.belzarrath wrote: ↑Wed Apr 26, 2023 12:54 am I am asking will there be any major, auditable effect to increasing the height of the cabinets interior dimension to 8" keeping all other dimensions the same?
It won't make any appreciable difference. The stock dimension is the shortest that will work. Since it's going to end up under a TV in most cases where space is usually precious I kept it as short as possible. I wouldn't bi-amp the SLA, it doesn't need enough power to justify the expense or complexity. Drive it, along with the L/R and surrounds, with an x.1 AVR.belzarrath wrote: ↑Wed Apr 26, 2023 12:54 am I am asking will there be any major, auditable effect to increasing the height of the cabinets interior dimension to 8" keeping all other dimensions the same?
Grant Bunter wrote: ↑Wed Apr 26, 2023 2:13 am The best performance is attained by building according to the plans. It's part of the reason the plans are quite specific, and give dimensions.
Deviating from the plans means altering best performance, unless you get the answer from the designer, Bill, who may or may not suggest other instructions as well, as compromises.
By how much?
I don't know.
Would that be a major audible effect?
I don't know. Could be, might not be.
It certainly will alter performance in a major way if, because of the extra height, you decide you can also now move either the midbasses or the HF components and/or their relative positions.
Me, I'd just follow the plans. Not because I'm a non thinking robot. I'd follow the plans because I trust the designs as they are, based on the performance of all the cabs I've built.
Good luck with your build...
I found an easy solution, add a .5" thick board to the top & bottom inside the cabinet. Now my dimensions will be as instructed.Strange Kevin wrote: ↑Wed Apr 26, 2023 1:58 am You want to keep the internal volume the same as the plans.
I believe it's less critical in a sealed enclosure but I'd do the math to keep it the same.
If you raise the top "X" amount bring the back in "Y" to compensate.
Too much math for me with the curved baffle, but, Good luck with it.
The physical crosovers on the SLA are really simple. Programming the Kab board might actually take longer.. but it should be possible either way.
If you're wanting to drive the 8" sub, mids, and tweeters with that amp, yes it will work and yes you'll be able to omit the passive crossovers. Although, Bill may suggest using some passive components between the amp and the tweeters, depending on your tweeter choice.belzarrath wrote: ↑Tue Apr 25, 2023 11:33 pm Could i use a dsp instead of the designed crossover? Thinking about using Dayton Audio KABD-4100 4 x 100W. or simular amp to drive the bass and sla. Never used one of these and not sure of setup, so any help would be appreciated and needed.
I had a feeling that perhaps individuals were not informed of my modifications. I was not sure if I should repost everything. Thank you Seth, I have more confidence that I maybe heading in the right direction. I will repost plans and concept soon.Seth wrote: ↑Thu Apr 27, 2023 12:21 am To the regular helpers in the forum, I had to look at the original post and refresh my memory of what his intentions are. It's a modified design. Might be worth a peek again.
If you're wanting to drive the 8" sub, mids, and tweeters with that amp, yes it will work and yes you'll be able to omit the passive crossovers. Although, Bill may suggest using some passive components between the amp and the tweeters, depending on your tweeter choice.belzarrath wrote: ↑Tue Apr 25, 2023 11:33 pm Could i use a dsp instead of the designed crossover? Thinking about using Dayton Audio KABD-4100 4 x 100W. or simular amp to drive the bass and sla. Never used one of these and not sure of setup, so any help would be appreciated and needed.
Board member CarterKraft used one of those amps in his Omni12 Tall Boy build and there's a good bit of information about it in the following thread. Finally! Omni 12 Tall Boy build
My only concern is thermal management for the amp. May be fine though.