[tasar]

Been gone from these parts since the days of the Super V.
Had some pulp coned full ranger JBL LE8s looking for work, thought I'd bump the plans, gather MDF waste and marry things with the PE Neo 3 planar, 1" denim faced 1# MLV, and finish in Mohawk perfect brown lacquer.
Baffle is 1", Neo cutout 45* full depth chamfer, requiring a mount plate to attach planar which remains flush with rear baffle surface. Top (incline) is full 3/4 rather than plan's 1/2". The top and bottom drivers are as physically close as can be. Driver time align is very close. JBLs run full range, they drop out around 5k. Simple coil/cap hi pass to Neo at 3k. Sound is exemplary, neo open baffle is best described as a smooth airy horn, JBL plays 40ish low, punctual within design's inert construction. Huge stage, image outstanding, these play "large" in my 15x24' diffusion attenuated room, giant killers ! May try a lower pass filter at some point Thanks for the plans, Danny.

[KTS]

https://www.audiocircle.com/image.php?id=267551



It looks like you put a Sunburst on the baffles! It looks like my Strat Ultra. Very nice!

[tasar]

Thanks KTS, yes, lots of lacquer practice !!
Geez... 350 plus views and, silence !!🤔
Guessing the DIY crowd has yielded to simple "glue and clamp" 

[borism]

They look great! Did you do any measurements in your room?

[tasar]

Thanks for the compliment "Borism". No OS or Windows here. Anyone with an IOS based software program, please illuminate. 750 plus reads, only 2 found it more than entertainment 

[dayneger]

That's a really creative interpretation!  Nice job repurposing your existing drivers, although I almost fell off the chair when I saw what a used pair of those go for. 

When you say the JBLs drop off around 5k, this "full range" driver tanks so fast you don't need anything to roll it off?

Also, not sure how you're getting into the lowish 40's?  I'm not a speaker designer, but that seems awfully low for a sealed box and driver that size?

[tasar]

The LE8s deserve every bit their reputation and following. Very clean linear response, see factory docs at their well appointed site. GR claims the NX reaches into the 40s but I have yet to hear of any room response software for IOS🤔, so respectfully retract my claim. Thanks for the compliment Dayneger. Later.

[Hobbsmeerkat]

The LE8s deserve every bit their reputation and following. Very clean linear response, see factory docs at their well appointed site. GR claims the NX reaches into the 40s but I have yet to hear of any room response software for IOS🤔, so respectfully retract my claim. Thanks for the compliment Dayneger. Later.

The NX tower models can reach into the low-mid 40s in moderate size rooms or 50Hz in larger rooms
The NX-Studio is rated at 70Hz, but up against a wall may dig a little lower.
The NX-Bravo is tuned to 55Hz, but with a longer port & near-wall placement they can get down to the ~40-45Hz range

[tasar]

Three months of listening with local group sessions comparing similarly sized offerings from Legacy, Fyne, KEF, and B&W. All agree the Studio "Scrapper" equals or exceeds in all areas. I don't bore them with the "cost factor", but know there's a few more DIYs that sourced GR components. That and with 1750 plus reads here, "sounds" like a win win.

[Tyson]

The nice thing about the Neo3 tweeter is that it can be crossed so low.   That opens up a lot of interesting possibilities to mate with an excellent midrange driver, like here. 

I'm a big fan of larger, high efficiency midrange drivers, crossed low to a world class horn loaded planar or horn loaded AMT style tweeter. 

[dayneger]

I'm a big fan of larger, high efficiency midrange drivers...

I'm interested in exploring designs that leverage those large high % mids... any favorites/suggestions, especially on the value end? Either for CB like @tasar's, or more likely, OB?

[Tyson]

I'm interested in exploring designs that leverage those large high % mids... any favorites/suggestions, especially on the value end? Either for CB like @tasar's, or more likely, OB?

A friend of mine has a DIY large format 2 way, JBL 2226H woofers, Beyma TPL-150H tweeters.  It's probably the best box speaker I've heard.  The key, IMO is he built it to be mated with subs, so he made no effort to get much deep bass but rather optimized everything for ultimate midrange performance. 

Now, for my tastes, the NX-Studio is still better, but it's also partially OB. 

[dayneger]

The key, IMO is he built it to be mated with subs, so he made no effort to get much deep bass but rather optimized everything for ultimate midrange performance. 

Good thoughts--lots to be said for keeping high excursion off of the drivers that carry the midrange!