moderately simple $500 or so DIY speaker

I'm looking for something to keep myself busy since I'll be having more time at home than usual with everything closing for a few weeks.

I'm thinking it might be fun to make another speaker. I've done the Overnight Sensations before and the two sets of the Zaph ZA5.2 before.

My main problem is I don't need another set of speakers and I have nowhere in mind to put them so it makes it harder to pick a build because there isn't a spot they will necessarily fill. I have a SS 80 watt per channel, a PP tube 20 watt, and a SE tube at about 7 watts. Two of my locations the speakers end up pretty close to the rear wall and in the 3rd they are about a foot and a half away. Unfortunately, don't have anywhere with enough room to use a design that has to be several feet away from the wall like an open baffle.

All I have is a circular saw and handheld router. I prefer to stay to a simpler design. I have stayed clear of the ones with elaborate internal bracing. My abilities are limited to building, not designing so I prefer proven designs with build plans that don't require any tweaking and if I can get a complete kit with everything from one place it is that much better.

My three top choices at this point are:
CSS P215 SHOP | css-audio

Zaph SR71 Zaph|Audio - ZA-SR71

GR Research XL-S Encore X-LS Encore kit

I realize that none of these would really be efficient enough for the SE amp but efficient and diy box don't seem to go together.

The CSS 1TD would also be an option if it is noticeably better than the p215

Anyone have experience with these speakers?

thanks
 
It would be better if you provide us with some constraints....do you wan tsomething similar or different compared to zaph 5.2? Do you want deep or tight bass? Any optimal size?

Otherwise, i would also consider rs225/10f FAST build, though it is suggested to buils a «second» enclosure for the upper range driver. And also the micro-statement from «speakerdesignworks» looks interesting if you don't need deep bass or high power.
 
Seems like a good time to experiment with controlled directivity from a waveguide tweeter to help room placement. There are several econowave designs with a 12" midbass, and a 14"-15" wide waveguide with 1" compression driver. You could build a floor standing cabinet if you desire deeper bass and it fits your room goals. You will find several proven designs on diyAudio, diysoundgroup, PartsExpress, AVforum. Google EconoWave + the woofer you want to use based upon cost, sound, and bass extension.

HT-12 FITS YOUR BUDGET - FULL FLAT PACK CABINET
diysoundgroup -- HTM -- front baffles, flat pack cabinets, HT-12, HTM-12
HT-12 Kit and Flat Pack Combo $272.40

PartsExpress -- flat pack cabinets and all necessary parts

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$14 B-52 PHRN-1014 [Part # 299-2303] 1" Horn 10" x 14" Bolt-On waveguide parts express

$62 Peerless 1.75" DFM-2544R00-08 compression driver parts express

$200 Faital Pro 12FH520 midrange eBay

$230 Faital Pro 12PR320 midrange parts express

$130 Eminence Delta Pro12A parts express

$170 Eminence DeltaLite-II 2512 parts express
 

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If you're looking for a small box used in the SR71 or the similar GR X-LS maybe I can help you get going. Small/square boxes like that only use a 1/2 sheet of mdf and a few hours with the right tools/machines.
Although, as you mentioned, they are not high efficiency speakers and might not be what you are looking for.