New project- open baffle recommandations?

[PreSapian]

hi gentlemen. i am looking for a new design to build with the budget limit of $1000. little over that would be acceptable as long as its desirable enough. my current consideration is RC3R from selah audio. however from reading on this forum the open baffle design choice becomes much more intriguing. is there any such design incorporating a ribbon tweeter? because that is the only requirement of my project. im a ribbons guy thank you for all the early replies. i'm dying to make some saw dust again

[gainphile]

That is a healthy budget. Dream budget for me actually

First of all, invest $60 for measurement tools.

Then $200 for 8-channel gainclone. Now you're left with $700+

First option, I'd buy Orion plan and substitute the drivers, e.g. W22=> L22 and TCF => 27TDFC, or perhaps Neo BG3. Find any 12" or 10" woofers which fits the budget with good xmax and cost.

Alternatively:
- DCX2496 xo: $250
- Zaph ZA14 + DQ tweeters (or Neo PDR) : $160. Mount them on narrow baffle 20cm x 110cm and eq with the dcx. Use the measurement tool outside to get notch q, depth, and f.
- H-frame woofer with 10" or 12" woofers.

[Rudolf]

Originally Posted by PreSapian

... the open baffle design choice becomes much more intriguing. is there any such design incorporating a ribbon tweeter?

A ribbon tweeter without OB might be the best OB ribbon tweeter

[PreSapian]

ugh. computer xo and active ones are a turnoff for me. with this budget im hoping to get to finally try out some mundorf supreme or jantzen at least. and hanging the drivers doesn't seem like the best solution. i would think that there'd be micro shaking of the axis from being hung and not secured entirely. yes this is also to become my dream speaker since i only have room and time for one pair. what is the need for an 8 channel amp, may i ask? i already have a rather formidable goldmund clone that i sadly wasn't the one to diy... xP. once again thank you for your inputs, gents.

[gainphile]

Acoustic output of a dynamic driver on open baffle is not flat, hence require shaping either with digital or active xo .. alas, multi-amps.

The challenges are:
- dipole peak
- -6db/oct at lower frequency.
- baffle size: smooth polar response vs. low freq. output

Good luck doing this with passive components.

[CLS]

Originally Posted by PreSapian

... hanging the drivers doesn't seem like the best solution. i would think that there'd be micro shaking of the axis from being hung and not secured entirely....

Try it, and you'll know

And for those 8 channels of amps, maybe 3-way fully active + stereo subs?

I'd like to suggest 4 channels for active 2-way (total 3-way) in the first place. You'll need at least active xover at the bass which will need some EQ.

[StigErik]

I agree with the other replies here: just forget passive XO with OB speakers, it will never work well. I suggest you start out with a DCX2496 XO and a stack of inexpensive amps, like the gainclones.

I just fell in love with the sound of baffle-less dipoles. They are easy to make, and sound fantastic! You will need something more than a 10" woofer, but a decent 15" will work unless you want to play very loud. Add a nice 8" or 10" paper mid/woofer and a dipole ribbon tweeter like the Neo3 you should be there.

[PreSapian]

i'd like to mention that i'm a complete noob at designing speakers as if my questions didn't make it obvious enough.. xD. i'd rather stick with a published and proven design so that i don't end up shooting myself in the foot at some point. sunflower would be appealing enough if it had ribbons.

[Rudolf]

Originally Posted by PreSapian

i'd rather stick with a published and proven design so that i don't end up shooting myself in the foot at some point.

Certainly a wise decision, but I don't know of any completely passive and completely OB system with a ribbon on top. There must be reasons for people to avoid that challenge.

[john k...]

Originally Posted by PreSapian

hi gentlemen. i am looking for a new design to build with the budget limit of $1000. little over that would be acceptable as long as its desirable enough. my current consideration is RC3R from selah audio. however from reading on this forum the open baffle design choice becomes much more intriguing. is there any such design incorporating a ribbon tweeter? because that is the only requirement of my project. im a ribbons guy thank you for all the early replies. i'm dying to make some saw dust again

You could consider my NaO Mini design. Substitute an Aurum Cantus G2Si for the tweeter and appropriate mods to the tweeter x-o and you on.