I scored cheaply some Altec 511b horns. Since i cannot find easily Altec drivers here in Europe, I wonder if somebody had some experience with any modern era 1" compression drivers and these horns?
I've found on audiokarma there had been some success with BMS 4550 and Eminence PSD2002. Any luck with some other driver? I know it is an old horn, and maybe not so hi-fi by today merits, but I would like to give them a try. I plan to use Hypex amp with DSP and cross it over to a 15".
Thanks in advance!
I've found on audiokarma there had been some success with BMS 4550 and Eminence PSD2002. Any luck with some other driver? I know it is an old horn, and maybe not so hi-fi by today merits, but I would like to give them a try. I plan to use Hypex amp with DSP and cross it over to a 15".
Thanks in advance!
I have heard good old Selenium drivers used well on the 811, but have not heard them on the 511. This surprised me, as the Selenium are usually thought to be a bit rough sounding. Well - not if you do the crossover right. 🙂 I have owned the 811 and the 511. A correct crossover is key.
Any good, modern 1" CD is going to work well is going to work well. You might have to modify the 511 depending on the driver bolt pattern. Have you looked at Radian?
You should get plenty of suggestions - good luck!
Any good, modern 1" CD is going to work well is going to work well. You might have to modify the 511 depending on the driver bolt pattern. Have you looked at Radian?
You should get plenty of suggestions - good luck!
Thanks for your reply. Radian is also on the list. Have you tried mating multicell horns to open baffle bass?
If not driven to deafening levelsI would think most any competent 1" driver could play pretty well to 1K or a bit below on an 511.
I like 511 as a midhorn for simple Klipsch style setups with phenolic diaphragm drivers - I'm not sure what's decent today without paying "too much" as PRV's 2" exid D2200ph is cheap and cheerful in the USA.
FWIW - here's an older Selenium driver, a D250 trio - not much top but had a chunky magnet. I think I paid about $35US at the time.
It probably would have graphed a bit smoother if bolted to a baffle of appropriate size. A trap plus inductor rolloff would take care of the junk on the high end.
I've only run 511 with 806A on top of Peavey's FH1 midbass horn and just prefer 3 way (plus prefer a Karlson to FH1)
I like 511 as a midhorn for simple Klipsch style setups with phenolic diaphragm drivers - I'm not sure what's decent today without paying "too much" as PRV's 2" exid D2200ph is cheap and cheerful in the USA.
FWIW - here's an older Selenium driver, a D250 trio - not much top but had a chunky magnet. I think I paid about $35US at the time.
It probably would have graphed a bit smoother if bolted to a baffle of appropriate size. A trap plus inductor rolloff would take care of the junk on the high end.
I've only run 511 with 806A on top of Peavey's FH1 midbass horn and just prefer 3 way (plus prefer a Karlson to FH1)
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Yes of course. Also the 511 & 811. I had a very nice 811 + OB bass rig for awhile. Have also done coax on OB.
With multi-cell I've usually ended up with bass reflex bass, tho.
Due to lack od bass or because od the better integrity od monopole bass with horns?
I think I might make a 2 way with Eminence Beta 15, OB if it can be done.
Some of that, yes. It was mostly situational, what was needed at the moment. I love the Altec 838 bass cabinet with the multi-cell, and I've also built my own cabinets with 15s or 18s but I needed the punch and efficiency of a bass reflex cabinet in theater work.
Can you get Selenium woofers were you are? And what multi-cell do you plan to use?
No Selenium in Europe, as far as I could fine, only thread on D220TI driver, and that is their only product easily available here.
I am planing to use 511b Altec.
Due to width od horn, there is no reason to go with smaller bass than 15", but I don't know how high could I let it play. I've read that Eminence PSD2002 sounds nice on 511b, but I doubt it can go lower than 1200Hz. And I don't think Eminence Beta 15 should be crossed that high? Or iz might be?
Ah, OK. The 511 is a "sectoral" horn not multi-cell. The 511 is a single horn with vanes that divide it into sections.
Somewhere on here I have posted photos of my Lounge Lizard OB which used the 811 horn and a Selenium woofer. The Selenium worked very well on OB as it had a Qts of about 0.65 and a fairly low Fs. Enough bass on OB, but always tight and clean.
Somewhere on here I have posted photos of my Lounge Lizard OB which used the 811 horn and a Selenium woofer. The Selenium worked very well on OB as it had a Qts of about 0.65 and a fairly low Fs. Enough bass on OB, but always tight and clean.
See here for the speakers. I miss them, they were a joy to listen to for music and even for TV shows.
https://www.diyaudio.com/community/...s-on-open-baffle-speakers.358425/post-6302211
https://www.diyaudio.com/community/...s-on-open-baffle-speakers.358425/post-6302211
Very nice looking speakers. I like the leather thing. Which compression drivers are in them? It was a passive crossover?
I think those where the Altec 806. I started with active crossover but then went to passive. I was quite a learning process.
It would basically be the Manzanita 15 with a horn. But the Lizards were before the Manzie .
https://www.diyaudio.com/community/threads/fast-fun-inexpensive-ob-project.110583/post-6507949
It would basically be the Manzanita 15 with a horn. But the Lizards were before the Manzie .
https://www.diyaudio.com/community/threads/fast-fun-inexpensive-ob-project.110583/post-6507949
Hi Sealed, Pano,
since Sealed might consider an open baffle, Pano could you give some more information about the Lounge Lizard OB, e.g., dimensions and especially how does one determine the cross-over?
Kindest regards,
M
since Sealed might consider an open baffle, Pano could you give some more information about the Lounge Lizard OB, e.g., dimensions and especially how does one determine the cross-over?
Kindest regards,
M
Well...... it's been a long time. Maybe 16 years. I might be able to dig thru me email archive to find something. My guess would be ~24" wide and 36" tall. I did not use rear wings, but should have. The 511 horn is basically 24" wide, so you would need that width. The crossover is hazy in my mind, but probably a big inductor on the woofer, like 15mH or so. What I do not remember is the crossover point to the horn or its EQ. The Manzanita is acoustically crossed circa 700 Hz, and the 511 with can play that low, but you'd want more than a 1st order crossover.
@Sealed If you can get the 15" GRS, can you get their new Pro 18'? It would sit well under the 511 horn. I have used 2X GRS 15 per side and loved it. A hypex can handle to 4 ohm load, right? Whatever you do, the 511 is going to be much louder than your OB bass. Maybe 20dB louder. You have to take that into account.
@Sealed If you can get the 15" GRS, can you get their new Pro 18'? It would sit well under the 511 horn. I have used 2X GRS 15 per side and loved it. A hypex can handle to 4 ohm load, right? Whatever you do, the 511 is going to be much louder than your OB bass. Maybe 20dB louder. You have to take that into account.
Hi Pano,
thank you for the reply. Please do not waste your time with digging out the dimensions, based on your answer and the picture, I think I can estimate it.
Regarding the cross-over, I was referring to this:
Will this not work if, and only if, the rising response of the woofer has the same slope as the filter?
Kindest regards,
M
thank you for the reply. Please do not waste your time with digging out the dimensions, based on your answer and the picture, I think I can estimate it.
Regarding the cross-over, I was referring to this:
Will this not work if, and only if, the rising response of the woofer has the same slope as the filter?
Kindest regards,
M
A simple very low 1st order generally works well to tame and cross the woofer to something like a fullrange driver than can have a gentle bass roll-off. That's how the Manzanita works. It's going to depend on the baffle and the horn as to how well they mate up without heroic crossover work. I'm curious now, because I can't remember what I did! 
Whatever it was, it worked.
Whatever it was, it worked.