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I don't know any cost structure on the passive but Roy told me his first pick on active x-over was the EV DX-38. I did a lookup on it and I think it retails for $1,300/1,500 range. Roy said: I would do active first over passive nets. I really like the EV DX-38 digital processors. They are very flexible and have the one ingredient that I consider a must if one is pursuing actives; delay. If that is the way you want to go, I still have all the parameters to input into the processor to get you going." Yes,my next active will have delay. Greg

Mike, I would be interested in the model #'s for the HF horn and the compression driver used with it.I refer to my Altec 511b's as big ol' horns,somehow they pale in comparison to THAT BIG OL' HORN!!! They would look nice on top of my LSI bass bins.You said the bass bin was 110db efficient,is the HF section padded down for tonal balance? Greg

Michael, I sit in front of the computer(in the sweet spot) and cruise the web,read this forum,and dream of new mods.The system is on always,my tube bill is gonna be high! I got the part about listening but not dreamin' covered. BTW,good pledge.I want to see more posts by you in the "Right this minute thread"![] Greg

lol, are you sure there isnt gas in that? Greg

LOL!!!! Charlie, This is some funny shit,but I am trying to have a serious discussion here..lol.Again thanks for your input,,,lol. Greg

Thanks for your input,where can I get one..lol,Tad should send them out with the drivers, Greg

Maron, I run an active system with a Rane.I got it cheap on ebay only to get the system up and running in active mode. I really like the Marchand's and saw a Pioneer D-23 on ebay today.I will upgrade eventually.Probably to a Marchand XM-44. I posted earlier about changing my Rane to 650hz from 400hz last night.It has just killed my sound.Everything was bass heavy,bloated and not as defined.I have adjusted the low levels and am still not impressed.I have lost so much of that magic the Wavelengths give me.I dont know how to describe it but the soundstage has changed more to flat.The air between instuments and vocals has dropped alot.The presence of vocals, instuments has gone down.The tube amps covering 400hz on up gave me a soundstage with presence and clarity and air,unbelievable.Now its just flat kind of like SS amps. Greg

Thanks Maron, That is what I wanted to hear. I hope to hear what they can do for myself soon. Greg

Shawn, Thanks for the post,I was looking at the response of the 288 in the 805 and was surprised that up high in freq.there was very little roll off.I always thought the large format horns and drivers pooped out at 15k.From what I see it does really good up to about 17.5khz then rolls off. Can you show how you have adjusted the response with your Behringer? Very interesting what a CD horn does to the reponse! Just currious. Greg

I posted a thread in the subwoofer forum that got LOCKED last week. I would prefer this one not to go there please. At this point I am more worried about blowing up $350 than dying in the act.I cant say what I would do if it did blow,probably leave the room.Not to flame anything here but common sense says run,primal instict...what ever. I am also currious as to the performonce of this driver,Maron? Greg

Hello, Sounds like patience paid off here,your gonna love them espcially with tubes.Congrats! BTW,Welcome to the forum.There are some great people here,we dont always agree but that is half the fun.Also the knowledge base here is incredible. So you want to play,how deep is your pocketbook lol because after you read some of the mods here things get very tempting. Greg

Bryston is a good choice,have had one in my rig for the last 20 years.Check on ebay for used.They can had for much less than new. Greg

Maron, Thank you for your thoughts on this. I am intrigued by this driver,stuff of legends and so forth,but since you actually use the TAD what is your opinon of the sound?Is it worth the investment and replacing the 902?You havent commented much on the sound other than its not very clean at 500hz. Greg

Dean, I repect Marons thoughts on this.Hell he has actual expierience with them.I wonder if his impressions of the distorted response at 500hz refers to all levels or when you dial the volume up. I see your point on useable response and how fast it drops out.I have to do some more looking at the configureation and how to set it up. As for deep pockets these would blow the budget out of the water,so they arent that deep.Its worth experimenting to get some impressions.I might be so impressed that 650 or 700hz would be acceptable.Guess I am so used to that 400hz mark and the big ol horns covering most of the freq. range.Kind of like a single driver speaker with subs.Way good sound here. The TAD's better blow the 902's out of the water or I might have to go back to that fork and take the other path. Thanks, Greg

Bill, The horns may have an inate 300Hz lower limit, but I believe the crossover point for the driver is higher. Yes,I didnt think he was crossed at 300 but was hoping for something around 500.To bad he doesnt give a specfic point. The main thing I got out of his interview it that you must experiment. I'd start with the TAD 2001 and work from there. I agree,I figure that I will cross over around 500 to see how it sounds.Obviously I will be conservative on the volume control.If I need to adjust up so be it.I figure I can unload them fairly easy if I dont like the sound.They go for over $1000 ea new.The price I am getting them makes it easier in that regard. << Recently, at the urging of a customer, I tried out the TAD 2001 1-inch compression driver on my round horn. It has to be the best horn driver ever made. The response has great transparency and depth. Most of the 2-inch compression drivers have no depth of image at all. The TAD 2001 is now incorporated in my System 50. >> Coming from Dr.Egdar that is high praise.I am looking forward to this TAD sound.If its noticably better then I might just have to cross it higher,the Scala bass bins are good to 800hz.If its that good then I might just have to buy my dream active crossover,the Marchand XM-44 with 48db slopes. Thanks Greg

another

Well I dout if I will ever buy new again.New Scala's are $5500 us + shipping=$7000.He is getting these for $4000 less than new plus shipping.They are 2000' vintage with the Al3 crossover and in very good shape especialy for factory black paint.Believe me paint will scratch if you look at it wrong.I understand the scam potential here. At present he is thinking it over. Greg

LOL, Is it Depaul?,man been so long,definately getting older! Greg

Dean, I understand your point here.You also spoke of the correct application and I understand that.The question would seem to be is the 500hz cross point a wrong application?According to TAD it is not.I am sure there are limitations at 500hz.Hey I dont want to blow a $350 driver.I posted this thread for info on my idea for this application.I have to say there are some good thoughts here.Thanks I just wonder why TAD would make such a fragile product then give specs like 500-22k response.Granted with a recommended 800hz cross. Greg

Here is an interesting link on the history of TAD and some applications.Check out the pic of all those TAD drivers hanging over the crowd with cranes.What kind of power are they pumping into them and if the soundman gets that x-over wrong and they do shatter...well lots of people below. http://www.reyaudio.com/history-e.html just a thought Greg

Well, you're talking about running the driver a full octave below it's recommended crossover point, and that's a lot energy being sent to something that wasn't designed for it. Also, you're assuming a clean 2 watts, and considering that what you're using amounts to nothing more than a pair of distortion generators .... What does it matter, it's simply the wrong driver for the application. You can cheat things a little, but you can't cheat them a lot. The spec sheet says 500hz-20khz,a tech in the TAD divsion says 500 w/24 db slope is ok,hey he might not know his head from his ...I understand what you are saying here about a possible wrong application.I read an interview with Dr.Bruce Edgar where he talks about using the 2001 in a 300hz mid horn.He says: Bruce: Well, there are two areas. I've been doing experiments with round horns. I've done 300-Hertz, round midrange horns for a number of different drivers such as the Altec and the TAD 2001. http://www.positive-feedback.com/Issue4/edgarinterview.htm I saw a few other references to a lower x-over point yesterday,cant find them at this time but it seems to have been done. I have my x-over on my Rane at 650hz as of yesterday.I am trying to get a feel for the sound and see how I like it.Its definately different than what I am used to. Greg

Funny you should ask...... again..... [] The first time was on the Lansing Heritage Forum, a while back. I'm surprised you forgot. 09-24-2004, 07:25 AM #30 Maron Horonzakz DON...... If the 475.....2450 type drivers using coherent wave phazing plugs were really designed for Be .... Why the odd 2450SL powder coat aquaplas diaphram as used in the JBL K2 95000 ? What was that coating supposed to do. And why the smooth coat rather than the ribbed pattern? (http://www.audioheritage.org/vbulletin/showthread.php?t=2861&page=2) 09-24-2004, 08:50 AM #31 Don McRitchie The aquaplas coating is intended to damp resonances within the titanium diaphragm. I'm guessing that the ribs, while stengthening the diaphragm at high output, create phase anomalies of their own due to the ridges in the otherwise spherical surface. It was probably not felt to be an issue in pro applications, but became a concern in hi-fi use. FYI, JBL was using the aquaplas coating on their ribbed pro titanium diaphragms for a time, but I don't think they are now. I'm not sure why they stopped. __________________ Regards Don McRitchie Webmaster (http://www.audioheritage.org/vbulletin/showthread.php?t=2861&page=3) I would humbly suggest that any coating of a metal diaphram is for damping purposes and not to prevent the dreaded Exploding, Killer Diaphram Syndrome. Of course, I could be wrong; dead wrong. [] If so, kindly point me in the direction of proof. I don't wish to die in such a scenario.http://www.audioheritage.org/vbulletin/showthread.php?t=2861&page=2'> Interesting development,maybe I'm not going to listen with hazardous materials as I thought or not AS hazardous as I thought? Greg

So,do you think I could slam the diaphram into the phase plug at 2 watts max output? LOL! That's what I was thinking also. Didn't I read somewhere a while back that PWK used to use Crown amps on everything? If so, it's no wonder that he blew those TAD drivers and whatever else drivers he had laying around. [] I guess Crown amplification would be the acid test for any driver! Greg

Yes,Buudy Guy not Muddy Waters,been awhile. Greg

Thanks Shawn, Been curious how this horn measures out.Maybe I am early in my post but what about the 902? Greg