Titan-615 General Discussion Thread - Page 31 - AVS Forum | Home Theater Discussions And Reviews
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post #901 of 939 Old 02-05-2019, 09:00 AM
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Quote:
Originally Posted by Pradeep2 View Post
Not mtg, but the Titan waveguide only secures via screws on the left and right sides. I can't see it holding up to pressure from the 15(s), if placed in the same airspace.
Ah, gotcha. I'm comfortable with fancy glues and plastic welding, so adding flanges and reinforcements would be feasible.

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post #902 of 939 Old 02-05-2019, 09:17 AM
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Yeah I figure you would have to add holes at the top and bottom of the waveguide for screws. I would also add some kind of brace from the back of the cabinet to the center of the waveguide (between mid and HF) so that it does not flex under the pressure of the woofer. You may also have to add additional gasket material around the midrange to make that airtight.
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post #903 of 939 Old 02-07-2019, 06:43 AM
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Titan-615 General Discussion Thread

Anyone contemplating adding the additional woofer, i thought I’d share pics of the crossover tweaks. I procrastinated on doing the recommended tweaks, because some foggy part of my brain told me it wouldn’t make much of a difference. But it did, of course. The bass, mid and low bass, are noticeably better. These tweaks really opened up the titans. Here’s a pic of the stock board, with arrows pointing out the 33ohm resistor that gets removed, and the 6 ohm resistor that gets a 10 ohm added in parallel. In the next pic you’ll also see the 4uF capacitor that’s added to the 18uF cap in parallel.
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post #904 of 939 Old 02-07-2019, 06:50 AM
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Quote:
Originally Posted by Jk7.2 View Post
These tweaks really opened up the titans. Here’s a pic of the stock board, with arrows pointing out the 33ohm resistor that gets removed, and the 6 ohm resistor that gets a 10 ohm added in parallel. In the next pic you’ll also see the 4uF capacitor that’s added to the 18uF cap in parallel.[/IMG]
Can you share the electrical schematic of the crossover?thanks.
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post #905 of 939 Old 02-07-2019, 06:51 AM
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Originally Posted by ricren View Post
Can you share the electrical schematic of the crossover?thanks.


I don’t have it. I’m just going off what the designer told me to do.
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post #906 of 939 Old 02-07-2019, 01:50 PM
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@mtg90 , were you ever able to generate a horizontal polar that included below 600Hz? Curious about dispersion in the lower mids where much male dialog is.
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post #907 of 939 Old 02-07-2019, 04:19 PM
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I never measured the entire speaker outdoors, it would be hard to get the woofer cabinet elevated on my turntable.

At the moment all I have is the horizontal polar for the mid/HF waveguide:
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post #908 of 939 Old 02-07-2019, 09:09 PM
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@mtg90 ...Yes, that one is posted way back there. Still darned impressive. If my room was dedicated, I could fit in a center Titan, and I'd load up on all-Titan LCRs.

Might it be safe to predict that the dispersion of the Titan woofer is much like the Fusion-15 below 600Hz?

Last edited by Cam Man; 02-08-2019 at 07:21 AM.
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post #909 of 939 Old 02-08-2019, 09:28 AM
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Yes I would expect dispersion below that range to be similar for both designs.
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post #910 of 939 Old 02-08-2019, 03:23 PM
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In general, how do the titan 615's compare to the Fusion-15's? Clearer,more detailed midrange?
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post #911 of 939 Old 02-09-2019, 12:17 PM
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Quote:
Originally Posted by mtg90 View Post
Yes I would expect dispersion below that range to be similar for both designs.
I think it's noteworthy to add that the Fusion-15 Sentinel page on the DIYSG site shows an off-axis graph. Given that the Titan mid-range wave guide provides smooth, wide coverage, and crosses to the woofer at 350Hz, it's specifically noteworthy that the off-axis performance of the 15" Sentinel woofer is quite good below 350Hz...wouldn't you say?

I only bring it up because it seems to fill in what we can't see in your polar of the Titan. That's a worthwhile thing for folks to know...that dispersion appears to be a fairly good match with the waveguides despite it being a large woofer.

Last edited by Cam Man; 02-09-2019 at 12:21 PM.
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post #912 of 939 Old 02-09-2019, 05:26 PM
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Well what your are seeing there in the off axis response of the Fusion-15 is partly due to baffle/box diffraction rather then pattern control from the woofer. You can see how it widens below 450hz then narrow a bit around 200hz. The dispersion of the two woofers themselves should look extremely close since they are both 15". I suspect the narrow Titan box would measure similar to the Fusion-15 being fairly close to the same width but the off axis from the wider/shallower titan enclosure might look a little different down there. Perhaps similar to the SEOSR design which crossed the woofers to the midrange around the same frequency:
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post #913 of 939 Old 02-09-2019, 08:39 PM
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Quote:
Originally Posted by mtg90 View Post
Well what your are seeing there in the off axis response of the Fusion-15 is partly due to baffle/box diffraction rather then pattern control from the woofer. You can see how it widens below 450hz then narrow a bit around 200hz. The dispersion of the two woofers themselves should look extremely close since they are both 15". I suspect the narrow Titan box would measure similar to the Fusion-15 being fairly close to the same width but the off axis from the wider/shallower titan enclosure might look a little different down there. Perhaps similar to the SEOSR design which crossed the woofers to the midrange around the same frequency:
In what way might the Titan look different? I ask because that may be affected if the Titan is installed in a baffle wall.
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post #914 of 939 Old 02-09-2019, 09:17 PM
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Well when installed in a baffle wall there would be no diffraction effect of the cabinet so all directivity control would come from the woofer itself. I suspect in this setting you would see a smoother but also quicker transition to 180 degrees at low frequencies.
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post #915 of 939 Old 02-24-2019, 07:57 PM
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Put together a pair this weekend. Any good suggestions for room placement and toe-in?

I also found I need to add foam rubber around the waveguide and hot glue the crossover resisters to keep buzzes and rattles down.
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post #916 of 939 Old 02-25-2019, 05:14 AM
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Originally Posted by naamanf View Post
Put together a pair this weekend. Any good suggestions for room placement and toe-in?

I also found I need to add foam rubber around the waveguide and hot glue the crossover resisters to keep buzzes and rattles down.
Correct me if I'm wrong, but with controlled directivity and with the use of AVR room correction, I would get as close to dolby atmos recommendations as possible in terms of placement and angles. In the front corners of a room would give you the least problems with boundary effects (SBIR)?

The angles and "toe in" are more about setting up the dispersion to hit all of your seating area effectively and pretty much to get MLP to get the most direct sound from the speaker as possible.

If the main speakers are also going to be behind the screen (16:9) then typically the speakers are in the "wrong" spot per dolby standards and you probably do NOT need toe-in.

Most room correction software is going to tweak the signal based on MLP, therefore you would in theory want the MLP to be getting the most direct sound possible?

In either case, my setup is front speakers in front corners aimed directly at me and MLP setup based on dolby angles. Fortunately the front of my room is wide enough to get this just right where my sitting position is also correct for my screen size. Once you get all these issues taken care of, its no wonder why most "Theater rooms" look about the same in terms of dimension proportions.

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post #917 of 939 Old 03-01-2019, 05:33 AM
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I tried them facing straight forward and that seemed to fix the horn shoutyness I was getting with them toed in. They sound pretty good uncorrected but even better with Dirac correction. They even do a good job for music, hoping I can get them dialed in where I don't feel the need to also have a dedicated 2.0 system for music listening.

Dunkirk turned up to 11. Holy @#*% cow!
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post #918 of 939 Old 03-01-2019, 05:54 AM
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Here they are, ignore the sweet center channel stand, proper one is one the way. Plan is to build a baffle wall and use another 615 as center. And more subs.
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post #919 of 939 Old 03-02-2019, 08:50 AM
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What are people with 615s using for surrounds? My 87db surrounds just aren't cutting in now I was thinking maybe some Volt 10s.
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post #920 of 939 Old 03-02-2019, 08:54 AM
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Originally Posted by naamanf View Post
What are people with 615s using for surrounds? My 87db surrounds just aren't cutting in now I was thinking maybe some Volt 10s.


I use volt 10’s. Highly recommend.
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post #921 of 939 Old 03-10-2019, 03:21 PM
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Hey all - I planned on doing 3 Titans for my LCR but I'm wondering if maybe they are too big for my setup? Maybe I'd be better off with something a little smaller like the 1099s maybe? I'll need to decide on surrounds, Atmos height (2 or 4) and subs but I figured the fronts would be the best place to start.

Thoughts? Thanks!
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post #922 of 939 Old 03-11-2019, 12:07 AM
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Hi,
Im thinking of ordering some titans. Because of shipping cost across the globe with freight shipping im leaning towards a custom box and not flatpacks.

Im just wondering if it is possible to build a larger box and lower the tuning a little, or would that mess up the crossover? Primary usecase for me will be 2 channel music, with HT as secondary.
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post #923 of 939 Old 03-11-2019, 12:40 AM - Thread Starter
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Originally Posted by mike greer View Post
Hey all - I planned on doing 3 Titans for my LCR but I'm wondering if maybe they are too big for my setup? Maybe I'd be better off with something a little smaller like the 1099s maybe? I'll need to decide on surrounds, Atmos height (2 or 4) and subs but I figured the fronts would be the best place to start.



Thoughts? Thanks!


There not to big for your room go ahead and buy them.
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post #924 of 939 Old 03-11-2019, 12:41 AM - Thread Starter
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Hi,

Im thinking of ordering some titans. Because of shipping cost across the globe with freight shipping im leaning towards a custom box and not flatpacks.



Im just wondering if it is possible to build a larger box and lower the tuning a little, or would that mess up the crossover? Primary usecase for me will be 2 channel music, with HT as secondary.


What tune were you thinking about having them at.
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post #925 of 939 Old 03-11-2019, 01:56 AM
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What tune were you thinking about having them at.
I was actually thinking about something similar to your titans, just with one driver. So was thinking of a tuning of around 25Hz with slot port.
Will this cause a dip in the frequency response when used with one driver and original crossover?
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post #926 of 939 Old 03-11-2019, 07:27 AM
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Quote:
Originally Posted by mike greer View Post
Hey all - I planned on doing 3 Titans for my LCR but I'm wondering if maybe they are too big for my setup? Maybe I'd be better off with something a little smaller like the 1099s maybe? I'll need to decide on surrounds, Atmos height (2 or 4) and subs but I figured the fronts would be the best place to start.

Thoughts? Thanks!
Those are similar to my room dimensions. Only your room is wider. I love how the titans sound in my room.
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post #927 of 939 Old 03-11-2019, 12:18 PM - Thread Starter
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post #928 of 939 Old 03-11-2019, 08:41 PM
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It's fine with the stock crossover but I would go for 6 - 8cuft (per woofer) tuned to 30-35hz for a flatter response down to tuning unless you are planning on boosting the bottom end with EQ.
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post #929 of 939 Old 03-30-2019, 07:41 PM
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One of the compression drivers in my set of 3 had a handwritten sticker label that says CENTER. These are all identical speakers in a vertical orientation, is this just for DIYSGs own sake? Im assuming nothing about the center should be different, correct?
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post #930 of 939 Old 03-30-2019, 08:34 PM
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One of the compression drivers in my set of 3 had a handwritten sticker label that says CENTER. These are all identical speakers in a vertical orientation, is this just for DIYSGs own sake? Im assuming nothing about the center should be different, correct?
I had that as well with my 893's.I believe they are all tested and the closest matching two are left and right.
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