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VOTT's Singing!

I'm thinking some good old solid wood ones, trimmed down to the proper size. They'd be heavy.

Interesting info about stacking the horns. I don't think I've ever seen that in the flesh. These woofers are 4 ohm and I did have to crank the Lpad for the horn about half way down to get it fairly balanced (by ear only). It seems the horn is more sensitive than the woofer here. It's also a garage/shop system and I have to watch pennies - the building isn't paid for yet. :D
 
dc270 said:
Love what ya done !!!!!
DC
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Thank you sir! I like 'em. :thmbsp: You get a lot of the credit for schoolin' me on the crossover design, and for taking the time and effort to make the Pony Express happen. :yes:
 
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Go bog or go home.

toxcrusadr said:
Kris - not sure what's happening with the pic, #2 is actually one of dc270's pics of the horns and drivers from the for-sale thread. Anyway you'll see them below...

Dukie: Enabler! :tongue: However the building is supposed to be a wood shop, so... :scratch2:

Closeup of the workings:
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These are on home made mobile bases with recycled casters for easy moving. No idea whether that's a good idea in terms of floor coupling, but it makes them easy to move without putting holes in them.
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Edge of the concrete is a great listening position.
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I like the way you think. There's nothing like realizing your speakers sound as good 100 feet away as they do at 50 feet.....:thmbsp:

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And Tom, is your e-mail address still the same? I need to start thinking about whether or not I can transport/absorb one of those leftover wooden boxes you have lying around....
 
Interesting info about stacking the horns. I don't think I've ever seen that in the flesh. These woofers are 4 ohm and I did have to crank the Lpad for the horn about half way down to get it fairly balanced (by ear only). It seems the horn is more sensitive than the woofer here. It's also a garage/shop system and I have to watch pennies - the building isn't paid for yet.
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The 210 will give you about 4-5db in horn gain, and 3db mutual coupling gain with it's tandem woofers above the 828 for a sensitivity of 108-109db. Simply put, a 210 based LF section will play louder than a single un-attenuated small format driver on a 511.

And Tom, is your e-mail address still the same? I need to start thinking about whether or not I can transport/absorb one of those leftover wooden boxes you have lying around....
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Same email addy Allan.

I've heard too many woofers in the 210's at this point, i'll be keeping the pair i have. But, don't let that prevent you from stopping by with cargo space.
 
OK, I changed my mind, I want'em back.:lmao:

Good to see those getting a chance to sing again. I waited a couple years for my room to get bigger, it just wouldn't grow. Hey, I can see my scoops now though.:scratch2:
 
Nice, Tox!
I've had my big Altec MLTL's outdoors. They seemed to sound better with less space between them at about 50'. At 100' they are much like venue sound, only tamer.
 
jaymanaa said:
OK, I changed my mind, I want'em back.:lmao:

Good to see those getting a chance to sing again. I waited a couple years for my room to get bigger, it just wouldn't grow. Hey, I can see my scoops now though.:scratch2:
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Let's fight to the death over them, and our wives can bury us in them. :banana:
 
Try posting a Wanted on Craigslist, you never know. Or put an auto notification search on ebay for Altec in your area. You may find someone gutting them and selling parts who has cabinets sitting around.
 
If you take two 828 stacked on the sides using 515 woofers you can easily reach 32 hz if placed against a wall out doors. Leave them pointed straight out and rotate the horn on top. I would lower the crossover to 700 Hz, and bi amp with a electronic crossover. _Maybe a Mcintosh 2200 on the bottom and a 2120 or 754 on top. 210 isn't going to reach any lower and will only be 2 db more efficient than 2 828 stacked. They will be easier to move around, too. When I used to mount pairs of 828s on top of scaffolding 10 ft off the ground with no wall was really difficult to reach below 50 hz with out an equalizer. I also stacked 4 828's with 3156 woofers in a square pattern next to 4 stacked 203 horns with 291 drivers on a high way over pass about 50 yards in front of a local Marathon event starting line. I used a Mac 2600 for the woofers and a 1/2 a 2500 for the horns. I was getting over 90 db near 1000ft, but I cut the bass off at 60 hz and the highs too. In Mexico City using 6 203b with 290 drivers powered by a 2300 we could get 84 db with a 6 db peaking factor at the New Basilica in 1976.
 
Update on these. The Denon amp is not rated for a 4 ohm load, and I think I either need different woofers (which are 4 ohm, horns are 16), or else an amp that can handle the 4 ohm load.

I didn't crank it up really at all until last weekend, and when I went to about 10 o'clock on the volume (remember this Denon is 105 wpc at 8 ohms) I got some breakup, cutting in and out and a couple of slappy thumps like the woofers were getting some serious distorted signal. This only went on for 5 seconds and I turned it back down. I now have a slight background hum/whistle from the amp. Still seems to work OK but to avoid a catastrophe, I'm now using only a pair of Infinity Qb's on that system.

It may be that the Denon (which is, after all, 20 years old) would have been in need of a recap or other service anyway. The fact that I could run these to decent volume on a Pioneer SX-780 (45 wpc/8 ohms) with no distortion suggests it's a possibility.

Ah, the joys of vintage gear. Seems like I have way more 4 ohm speakers than 4 ohm rated high current amplifiers.
 
analog addict said:
I like the way you think. There's nothing like realizing your speakers sound as good 100 feet away as they do at 50 feet.....:thmbsp:

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And Tom, is your e-mail address still the same? I need to start thinking about whether or not I can transport/absorb one of those leftover wooden boxes you have lying around....
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Love that! Hope you have understanding neighbors!
 
Update on the Altec project. At the KC Twangfest a couple weeks ago I picked up a nice NEC preamp from Battradio. This made it possible to use the Hafler P230 that's been sitting for several years. The Hafler is 175 WPC into 4 ohms. The extra muscle made a HUGE difference in the sound on these speakers over the anemic (and possibly in need of service) Denon. For one thing, the bass came alive. I was EQing the heck out of the low bass to get a balanced sound. I'm not a bass hound guys but it was lame, which I thought was due to the cabinets designed to roll off at 50 Hz. The amp had a lot to do with it. I found myself re-equalizing things substantially.

Just for kicks here's the new gear stack for the Garage Mahal. The rack is steel tubing with glass shelves and casters, just picked up last weekend off Freecycle. I love free stuff. :D

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From the top:
Laptop
Denon tuner
NEC Preamp
Crappy Sony CD player
Semi-OK Pioneer double cassette
Pioneer SG-95000 EQ (had it sitting around and using it to get the Altecs sounding good, after which perhaps some crossover mods?)
Hafler P230

Having fun with audio. :thmbsp:
 

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