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It's only taken me 6 months. It was a lot of fun and I enjoyed this project. I'm enjoying the results even more!
Now I've got room in the shop to trim out and finish the Seismic horn sub.
Follow Ups:
Hi, can you tell me what size is the throat opening on the mid-bass horn? thanks
But what does a set of speakers like that set you back?
JR specials, are they?
The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.
Bertrand Russell
did you notice any sonic difference between time-aligning the drivers and not doing so?
thanks
You're good!
Dan,
Great looking Titans, beautiful wood work. Are you using 1.5 uF cap for the Fostex tweeters?
Thanks! I haven't added the 1.5 yet. Bruce had mentioned that to me but I neglected to add it to the list when I ordered the other supplies from Allied. Guess I could just use one from Radio Shack for the time being.
What is your impression of the difference with the 1.5? I'm assuming it gets the fostex more into the mid-range?
Dan,
I don't have the 1.5 cap. Bruce told me he found some NOS .5 uF that I could add to the 1 uF still waiting for them.
Strongly suggest you use teflon V-caps on your tweeter. They made a huge improvement over the stock Mundorf silver/gold in my Omega DUOs.!
yes, costly but worth every penny!
Enjoy yopur new speakers!
Duomike
Just checked the price of 1.5 uF V caps, $480 for a pair. Are they worth $400 more than Mundorf Silver/oil?
In my case I needed 2 x 3,3 uF and they were app. $ 900 more expensive than the silver gold.
If you have excellent electronics and speakers, have taken care of the usual things like good isolation, dedicated lines,, room acoustic it is surely worthwhile.
I thought the silver gold is as good as it gets but was shocked to hear how much better the v-cap was. in tweeter xo the cap is in series with the driver. What get lost here even the best driver can't recover. Buy the best cap your budget allows. Be warned about the lenghty breakin of these caps. I had mine cooked for 4 days by manufacturer in cable cooker.
Very nice, very nice indeed.
Thank you, Tom. I've learned so much from you and the others here. And yet I've just begun to scratch the surface.
Happy 4th!
absolute gorgeous
I can only dream of such wokmanship
how do they sound
Thank you!
They sound very good to me, but I'm a biased, proud poppa. :)
The transparency is very good but I'm thinking I could improve on that with some changes to the wiring and x-over connections. Just Radio Shack magnet wire for now.
I was expecting to have to do a lot of moving around of the drivers and such to get them to blend well. So far I haven't felt the need to do anything beyond experimenting with on and off axis listening. The mid-range is very impressive. Lively, a bit forward, but with no horn coloration at all that I can detect.
I'm thrilled with the Fostex tweeters! Very smooth and without glare. They have proved to be worth the extra money.
The mid-bass is tight and fast. I just pulled out the stuffing from the rear chamber and that seems to have improved the punch a bit. Obviously they don't go real low but as I mentioned I've got one sub horn to add and a second one on order from Bruce.
I can't wait to get my phono stage back so I can hear some good analog source through these bad boys.
I found that Mills wirewounds in the crossover added some transparency and sounded cleaner and tamed some "shoutiness". I also bypassed the midrange oil caps with a 1uf Mundorf silver and oil cap that I originally bought to try for the tweeter, but it ended up with the midrange. It did take forever to break in. I took it in and out several times trying to decide what I liked better. The Mundorf gave much more transparency and life that I couldn't give up, but got tiresome on long listening at first. As it broke in, it stayed in.
Congratulations!!!
Can you give us some comparison points between the Titans and the Acapellas, pros and cons of each I know it would be mainly a flavor difference...
What drivers are you using on the mid range horn, JBL 2441?
Thanks!
The Acapella driver does cover the 750-30KHz range as advertised. It has a very nice mid-range presence and does a fantastic job with voices. Does a wonderful job with horns and saxophones. There is some noticeable horn coloration around 1kHz, especially noticeable with that band of the piano, but not unpleasant. I'm not sure if this is a result of the 1" throat or the crossover pole around 700Hz.
The Edgarhorns are much more forward in the mid-range. No horn coloration that I can detect. I haven't heard them do the sax and trumpet as well as the Acapella but I'm reduced to using my CDP (phono stage power supply is being tweaked) so I'll reserve judgment until I get my analog source running again. Yes, I'm using the 2441's. The Fostex go way over what the Acapellas can deliver in the HF. Maybe thats because they're more efficient or just the benefits of having a 3-way? I do know that Acapella pads the driver down so that it better integrates with the woofers and they fold the upper woofer into the mid-range a bit to help smooth that high xover point.
The bass of the Acapells is very impressive. Fast, tight, tuned. And those 4, 6.5" drivers easily get into the 20Hz range. They don't have the chest slam like say an Aerial 10t, but still do a great job. At first I was a little disappointed with the EV 15B's I'm using in the Edgarhorns. I've learned this morning that the fiberglass I stuffed in the rear chamber was holding them back. Once I removed that they really came to life. For a large driver they really don't give up anything to those smaller woofers of the Acapellas. And I think the LF is more pure with the 80Hz cabinet.
I'm sure we all know that the Edgarhorns require a pretty good size room just to get in the door. Mine tip the scales around 330 Lbs a piece. More than twice the Acapella. Not to mention that you really need the Seismic horn to get down into the lower registers. I'm using a Nick Doshi modified Lectron JH50 push-pull amp to drive the Edgarhorns and it's evident that they can be driven by much lower powered amps. The only requirement is that the amp needs to be quiet. The Lectron used to be fairly quiet until I hooked it up to these super efficient drivers. The tube rush is evident but not unbearable. The Partridge iron in the Lectron makes it worth living with a little more noise.
I believe that Acapella fudges their efficiency numbers. They can be run with SETs but I quickly ran the Lectron (50 watts/ch) to compression. They really open up beautifully with 100 watts or more. I use Rogue M150's with them and they just loved the extra juice. The dynamics just took off. I'm sure they would really shine with more refined amplification.
Both the Acapella and Edgarhorn are very competent and enjoyable speakers. I think the Edgarhorn is better integrated and is less colored. I'm really glad to have had the opportunity to hear both of these speakers in my system.
The presentation of the Edgars is very even top to bottom. But the more I think about it, everything is more forward with the Edgarhorns. Gotta be the increased efficiency.
I've heard a set of Titan's on a pair of 845's. Very nice indeed. That's one of the reasons I left the x-overs external. May even try bi-amping with an active x-over at some point.
Thanks Dan,
That was a very descriptive comparison. I was also using Class A push pull amps but now I got a New favorite....SET 45. It seems 12 watts was way too much for my horns, and believe or not SET with this efficiency is much more dynamic than push pull, and bit more transparent.
Hmm. That should not be... Perhaps things will fall into balance after the hornsub is hooked up. After all, you essentially only have treble and midrange at the moment.
But of course a glorious SET IS in your future :)
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