Model 19 building plans

[bigjunglejim]

Hello. I have some extra 416-B's and 802's + 811's and Model 19 X-overs I've pick up over the years. I'd like to build some model 19's for modile DJ gigs. I don't want to use good walnut or oak cabinets. Anyone have any decent building plans?
Thanks, [email protected]

[Tenorman]

Sent to your email.

[gamalot]

Just wondering if an A 7 cabinet style would be a better choice for your intended use.
My impression of the horn loaded Vs direct radiating LF is the horn loaded works very nice in larger areas. I also would prefer to have the woofs somewhat set back or "Out of reach" over the up front proximity of the 19 style in a crowded room.
What ever choice you make I would look into some child proof covers over the woofers because some fools can't resist smashing in dust caps.

Gary

[bigjunglejim]

Hi Gary
A-7's are great however, I love model 19's and they will do a great job for the jobs I'll be doing. The drivers and horns will be protected.

I have a bunch of Altec horn loaded cabinets (816's and 817's. I also had 4 210's which I sold). I've never owned A-7's. In my inventory I have a bunch of direct radiating Altec cabs too.

I was considering making some direct radiating and ported cabinets that use 3 or 4 416's with a 288-G driver mounted to a MR-94 horn. I think that would be a kick *** combination. Perhaps go 3 way by adding 4 or 6 MR-94-HF for a little more high end. But, by doing all this, I'd be getting big and heavy again. That's what I'm trying to get away from.

I think by using 2 Model 19's up front or surrounding the dance floor with 4 or 6 Model 19's would be a good sounding set ups and, they would be easy to move. I was also thinking about building subs the 19's could sit on so the horns would be above head level. Doing this would make the systems BIG which is what I'm trying to avoid.

I'm open to suggestions.
Happy new year, [email protected]

[bigjunglejim]

Gary, hello again.

I had another thought. I have 12 604's. Perhaps I should make some 620 cabs and load them with 604's.
I could lift them above head level with something like a Genie Lifter shown in the following link: http://www.genielift.com/ml-series/ml-1-2.asp
Of course, I'd have to make my own as I'm sure a bunch Genie Lifters would be out of my price range

The options are endless (unlike my funds).

I think starting with 2 roadable 19's will be a good start for now. [email protected]

[cclark65]

Originally posted by gamalot:

What ever choice you make I would look into some child proof covers over the woofers because some fools can't resist smashing in dust caps.

Gary

<font size="2" face="Verdana, Helvetica, sans-serif">No doubt, I had somebody put their hand into my 15" midbass (Altec 3156) and totally destroyed the cone, ripped completely off the voice coil under the dustcap and above the spider assembly.

[gamalot]

I do love and share your enthusiasm for the Model 19s. I am not at all a sound tech by any stretch but my thoughts regarding the 19s in a High power system such as you plan differ from yours.
19s are a tamed down version for home environments and at the 1200Hz as designed you may find other higher output combinations better for you needs.
I am sure others here with more technical expertise may have different thoughts but the 19 was made specifically for home use while many other variations tend to be much better in pro settings. YMMV as only you know the size and occupancy of the room in question. 19s come in around 150 pounds each and I would think a plywood box to be the much more durable choice over the two box particle board 19s.
Do as you may but it strikes me odd that you are leaning toward a design that is a tamed down Semi VOTT version for in home usage. IMHO the A7 would be a perfect match for your needs and will outperform the 19s in every way.

Gary

[Tenorman]

Gary, from his point of view, and I have to agree, as my PA speakers follow a similar pattern, is that people (ME!) have to move that stuff around. A Model 19 is a lot easier to move around than an A7 cab. You can fit a lot of 19's in the back of a large van or pickup or small trailer.

I have in fact build cabs similar in size to 19's for A7 owners, transferred the horns, woofers, crossovers to the smaller boxes, so they can actually use them for gigs, the A7's just being too much hassle.

Let me recommend 11 or 13 ply Birch for mobile speakers, rather than particle board or mdf. The weight is a LOT less, and you won't damage them in transport like happens with mdf. Just hitting a bump on the road can rip heavy drivers out of position with mdf... ply is the superior material here.

And we have been successful coating the speakers with truck bed liner paint, going on with a texture roller. It gives a finish that from a few feet away looks like wrinkle vinyl, is tough as nails, and easy to touch up if necessary. You can get a kit at Walmart with all you need.

[bigjunglejim]

Hi Gary... In my last post I said the drivers and horns would be protected. I meant to include the woofers... OOPs I goofed.

The reason for the horn cabinets in the first place is to control the dispersion (and load the woofers). Traditionally the speaker was centered behind the screen and it was projecting down the center of a long rectangle shaped building. As the theaters grew in depths, better control of the dispersion was needed. Remember, there were no BIG amps and the speaker manufactures had to make very efficient boxes to get the sound to cover large areas with long throws. The gigs I'll be doing the 19's should work well. I've been running 19's with 250W per side @ 8 ohms for years without any problems. The 19's get loud, full sound, good low end and the dispersion is good. The A7/828 bins dispersion pattern is 90 degrees Horizontal by 40 degrees vertical. Model 19's are 105 X 105 (-6dB) The 105 X 105 degrees of dispersion was taken right from an Altec brochure. I always wondered about the 811 horn and it's 90 X 40 degree pattern. None the less, Altec claimed 105 X 105 dispersion with pink noise from 80-800 Hz at a distance of 4 feet (-6db). I'll go for the wider dispersion vs the longer throw. Somewhere tucked away in my den are Altec brochures showing the specs on the different woofer / bin combinations as well as the specs for horn and driver combinations. I wish I could lay my hands on them and I could quote Altec specs and do a comparison. Right now I'm using the LAR principal (looks about right).
Happy new year, [email protected]
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[MikeInNH]

MANY years ago I was in a group and we had 4 A7's. After our third move..we put them on Casters. Made life a LOT easier. If you go the caster route make sure you get the ones that lock. There is nothing more disheartening then watching your A7's vibrate themselves off the stage.