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In Reply to: RE: Onken Suggestions posted by freddyi on January 14, 2016 at 07:40:54
Ok, now I am pretty confused haha.
The pair of speakers that really got me excited about the whole idea originally were made by a HiFi company in NZ called Parmeter Sound. However, I cant afford to pay $40K for them!
https://systems.audiogon.com/systems/5021#&gid=1&pid=29
From what I can see he is using a TAD 1601a with a TAD 4001 driver and a custom passive crossover for claimed frequency response down to 28hz and overall 102db efficiency. He's using ultra expensive Duelund cast capacitors (that's like $3-4K in parts right there!) in the passive crossovers but other than that I think I can do something comparable within my budget.
I gather from people's responses here that the A7 is a far better choice but even the biggest A7 cabinet taps out at 40hz, which is a bit less than I would like. Also, would the 2" 4001 driver be a better choice vs a 2001 or 2002 driver? The 600hz crossover point may help a bit vs. the 800hz minimum for the 2001/2002. The 4001s can also be had much cheaper but I don't know how they compare sonically vs the 2001/2002 which I know sound excellent.
http://tad-labs.com/en/professional/unitspeaker/unit2.html
Follow Ups:
as TomServo mentioned above, you could save money over TAD with a BMS4550. If you want 30Hz and are willing to accept EQ then some woofers set for 40Hz alignment could be tuned a half octave lower and would allow a 6th order bass-reflex alignment with an underdamped 2nd order highpass or parametric bump centered around 1.03* tuning. In an Onken type or reflex with an even amount of vents, this would mean half of the vent area would be blocked. That type vent might be deep enough so one would not want the back of the vent open and front closed as could inadvertently create a resonator. If you were using only digital then probably there's a media player with fine enough graphic EQ to get the needed boost.
Karlson Evangelist
do you think you could get results nearly as good as the TAD with say a B&C or BMS driver? are you thinking of using a 511 if going with A7?
some KBG capacitors would save money too and probably make things sound pretty good.
it gets confusing - what I wanted to know was if an Altec 2-cell horn gets lumped into the characteristics of "multicell"
I generally prefer Karlsons to horn systems for punch vs size but like various approaches.
seems like an A7 would be somewhat "mid centric" in balance - ?
here's 203B - I've got a pair plus some 291 (?) somewhere needing diaphragms - I can barely remember what a 203 sounded like on top of a Peavey FH1 - think it made it to ~6K
Karlson Evangelist
Hey Freddyi!
I had most of the Altec multicellular models years ago as well as a smattering of the original Lansngs, and the 203Bs were my favorites when driven by 288s. Great 300 Hz. loading plus narrow pattern, ideal for living room listening. There is the moderate coloration of an exponential horn, but huge dynamics and excellent imaging. I have several of them stored away and should give them another listen!
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