Cab Sizes - L101 vs. L99

[Earl K]

So, how low can the LE20 safely go?

- Here are some measurements done by the eminent Bill Woods ;

- You can see that you don't really want to push the S99s crossover point lower than where it's presently set .

- If you want to add an AC impedance graph to these 2 , that would be nice to have on record.

[Zilch]

Compare to 2418H-1 on PT-F95:

http://audioheritage.org/vbulletin/s...t=6050&p=57029

[2426H also shown....]

[johnaec]

- Here are some measurements done by the eminent Bill Woods

Ha ha - that LE-20 curve looks like "constant directivity".

John

[johnaec]

This'll work, but you'll still need a sub.

Hey Zilch - will that PT waveguide fit where the S99 port and HF are? If so, that might be interesting, with the port moved to the back...

John

[Zilch]

You're so DAMN clever, John!

Have we discussed this before?

Yup, that'll work - here's the pics. Gasket outlines the maximum cutout required. Not gonna be much baffle left.

We'll lose some precious volume and have to retune accordingly. Can pick up a bit by removing the crossover, tho.

The single large port won't fit, but a pair of smaller ones will.

Worth a "Go," I'd say. They'll be little hotrods. Not much extended bass, but....

Any of the PT-F waveguides will work. PT-F1010 w/2435HPL shown at bottom.

These are actually John's boxes I'm gonna cut into, folks.

[He kin come help do it, tho.... ]

[Earl K]

- Here's a series of pics snapped ( off of eBay ), 3 1/2 years ago .

- These are a custom le14 / DLH175 setup .

- There are a bunch of things I really like about this design, in the classical furniture sense. ( though the port placement doesn't "look" quite right ).

- You'll notice how the designer made up a bit of volume in the rear by having a removable back that laid ontop of the rest of the box . This gains ; .75" by X by Y . This idea might be worth considering to help regain the volume lost when including a horn .

- ( BTW ; I think this fellow finally came to his senses and kept these beauties )

- Nice Wood !

[soundmotor]

Worth a "Go," I'd say. They'll be little hotrods.

You are the people my mother warned me about.

[Zilch]

You are the people my mother warned me about.

We'll go first, O.K.?

Looks like we're gonna improve the bass response, in fact.

Actual gross internal volume is only 1.419 cuft.

Did y'all know the sides of these are 1" thick?

Red = Standard S99
Black = PT-F modded, retuned

[Zilch]

You'll notice how this designer made up a bit of volume in the rear by having a removable back that laid ontop of the rest of the box . This gains ; .75" by X by Y . This idea might be worth considering to help regain the volume lost when including a horn.

Good idea Earl. That'll get us 0.18 cuft, and more than make up for the horn and driver.

The more volume we can get, the lower we can make these play....

[johnaec]

They'll be little hotrods. Not much extended bass, but....

'Nothing a little judicious use of EQ shouldn't be able to take care of, at least for a solid 40hz.

John

[Zilch]

'Nothing a little judicious use of EQ shouldn't be able to take care of, at least for a solid 40hz.

John

I'm thinkin' a dual LE14A sub like Gordon designed, of course, or a pair of Citation 7.4 boxes with LE14's in 'em.

If these work, they'll make a killer HT system. BB6P says no constraints at full rated 100W. Cone excursion limited below 25 Hz only.

[O.K., where's the SawZall?]

[Zilch]

1) One inch hole saw makes corner radii in cutout laid out from gasket. It's 1/2" smaller on the sides, and 3/16" top and bottom versus the gasket to preserve baffle.

2) Particle board or MDF, they're no match for the Barbie SawZall. I'll likely glue 1" x 4" brace across the back of the baffle between the woofer and horn. Not much left there.

3) Assembled. Detail the gasket carefully to make a decent seal at the lower right where the port was.

4) Grilled. They'll NEVER know.

Fabric grilles would probably work better, as the fretwork no doubt messes with the controlled dispersion somewhat.

Or maybe Sonofagun foam grilles so's they look like L100's. Same box, basically, tho S99 is a little narrower. How 'bout matching the L200's, then?

5) Hotcha!! B380 will augment the bass. Here, without ports, just the crossover cutout.

Gotta work up a crossover for these. That's the biased AM playin' 2418H-1 crossed at 1.1 kHz there....

[johnaec]

Zilch - that is so kool! I can't imagine those cabinets going to a better use! It'll be interesting to see what difference ports make. I've got a bunch of different size cardboard tubes, if needed...

John

[Zilch]

I've got a bunch of different size cardboard tubes, if needed....

Gonna use ABS pipe here. Just need the right size hole saw....

[Zilch]

Zilch - that is so kool! I can't imagine those cabinets going to a better use!

Heh, heh. I imagine there's a bunch of members cringing about now, tho.

Consider this: There's hundreds of LE14A's sold on eBay each year. They all came out of cabinets that likely went in the dumpster.

We'd do well to contact any local LE14A seller, inquire as to the cabinets, and rescue them. Or, if we buy the speakers, get the cabs, too.

Any LE14A's that have the black paint stripes on the flange faces likely came out of S99's.

Let me assure all, even with JBL's cheapest horn and driver, these sound better than any S99 ever imagined it could.

And I got them for free....