JBL 2 WAY Project

[cooky]

With some serious Be comp drivers and horns no longer in use
from a previous Array project I've decided to upgrade my AV mains using JBL 2206H Bass mids and the SAM1 horns.
70L ported, good down to 55hz I'll be using a BK XXLS400 sub(maybe 2)

The porting will follow JBL's latest thinking featuring large radius flanges on each end, the bass will be EBS aligned as this gives the best subjective bass to my ears.
I wish I had a pound for the times I've made this recommendation(to Tannoyista's mainly).
Enclosures are shaped to eliminate/minimise standing waves and will be lined with 1 to 2" fibreglass a la JBL. Crossovers will be active DSP @1200hz(slopes to be decided)
Amps as befits an AV system will be 6 channel Rotels.

http://farm9.staticflickr.com/8525/8637512131_38ffbf1135_z.jpg

Substantial magnets/construction is pretty much parr for JBL Pro. These bass mids are the equal in distortion terms of JBL's latest 1200FE.s.

http://farm8.staticflickr.com/7050/8689482576_93ca6aa660_z.jpg

Flatpack well packed.

http://farm8.staticflickr.com/7049/8689485178_262b82d06f_z.jpg

Panels were so accurately cut a dry assembly was easy and lacking any surprises, some very interesting intersections between panels too.
Credit to Neil at WA for accommodating my design modifications.

http://farm8.staticflickr.com/7054/8689496704_893ee671e1_z.jpg

Box glued up, baffle and chamfers placed for fit only.

http://farm8.staticflickr.com/7051/8689497596_2d666d346c_z.jpg

Hard to resist so dropped drivers in place to get an idea for the way they're going to look.

http://farm8.staticflickr.com/7054/8688384915_aae2e1ea85_z.jpg

I'm going for a satin black finish eventually and will post progress as as when.

Cheers

Frank

[walpurgis]

Nice!

I love the serious JBL stuff (and Tannoys). Especially the beautiful drivers they used to turn out in the seventies, along with companies like Altec and Coral. Pioneer still produce some top class professional bass drivers and compression horns if I'm not mistaken.

Should be an interesting project.

[Rowlf]

Will be following with great interest. Subscribed.

[wiicrackpot]

Frank,

Front row seat here too, keep them updates coming. :cool:

[hoopsontoast]

Nice, those WA cabinets look nicely made, is there any bracing?

[freefallrob]

Ooh, lovely, they look FUN!

[cooky]

Nice, those WA cabinets look nicely made, is there any bracing?

They pretty much brace themselves and sound/feel dead but I'm adding a support brace for the Horn and may well put a T brace near the bass driver.

[Ian Walker]

Nice them Frank...OK if I drop in for a front row LIVE view ?...:-)

[cooky]

Nice them Frank...OK if I drop in for a front row LIVE view ?...:-)

Of course Ian, I'll let you know soon as they are done.:)

[Ali Tait]

Very nice indeed.

[meridian man]

Wow frank, they look great.

I'm really amazed by WA for making a cabinet like that with all those cuts, was it "really" easy to stick them together? Did all the joints match up gap less.

Are we talking crazy money for a design like that.

Cheers

[Jonboy]

Any links to WA cabinets if thats what they are called ??

Not sure who they are or what they take on

Thanks

[cooky]

Taking these as the base, baffle shape/layout and porting was modified. A rear hatch to access the compression driver and mount the horn was added.

http://www.wilmslow-audio.co.uk/prestige-cabinets-360-p.asp

They go together really well and yes, some of the panels are very sharp with some funky machined angled joints, these were altered from originals but matched up perfectly.


£300 plus postage.

[cooky]

The 4" voice coil 12" 2206h bass mid is a pretty exceptional beast with THD of around 0.35% over most of it's range measured at 111dB!!(most manufacturers only publish their 90 dB measurements...)

http://farm6.staticflickr.com/5330/8750286015_1a43269e45_z.jpg

The following shots show added corner braces top front and back, sand/paint(6 coats) and internal damping fitted.

http://farm8.staticflickr.com/7286/8741153869_0c05720cd9_z.jpg

http://farm8.staticflickr.com/7287/8742297714_1d5748aa99_z.jpg

http://farm4.staticflickr.com/3705/8771740604_9f00bf4603_z.jpg

http://farm3.staticflickr.com/2838/8771929436_ea62fc21c8_z.jpg

http://farm4.staticflickr.com/3743/8771931822_0a56062550_z.jpg