Need design for TC Sound Pro 5100 driver................ - AVS Forum
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post #1 of 15 Old 10-26-2013, 11:39 AM - Thread Starter
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Here is current graph using REW with Audyssey XT32 enabled..................as you can see, XT32 is neutering everything below 30 hz. The only sub in room is a JTR S2 which is quite shocking since I expected better numbers down low.







Here is REW graph from front three seating positions with XT32 disabled.....................as you can see, the LF looks better but most definitely DSP will be needed. I don't know about you guys, but I'm shocked how XT32 is cutting off at 30 hz.


The easiest solution would be to add another S1 in rear to attack the issues, but after much thinking/researching..........I'm looking to enter DYI using the Pro 5100. Roger Dressler came to my room and measured response and has a few great ideas modeling a house curve to deal with room issues. After much though.............the best way to address current room response and to follow Roger's suggestions would be to add the 5100 in rear of room.

My dilemma.....................I've never build a sub before, but have a long list of building experience...........so I'm not too intimidated. biggrin.gif


So..............the reason for my post, would like to utilize the experts here and find a CAD design to build a single sub using 5100 driver....................there is room behind the second row for horn design, but I'm not too keen on building something that big. In addition, due to lack of knowledge in design and implementation................I have no idea how to design a tuned ported sub for response to complement S2. I'm OK with implementing a ported sub...............but it has been suggested the 5400 Ultra would be a better match with S2, but after much thought........the 5100 might be a better option to implement house curve I'm looking for.

Would like to know how to access designs and implement proper tuning with design for rear 5100 ported sub.

Thanks
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post #2 of 15 Old 10-26-2013, 11:54 AM
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just so folks know what you are working with, the s2 is a dual 18" sealed cab with 30mm xmax drivers and 4kw of power.



i'm not sure a pro 5100 is what you are looking for.

what are you trying to "fix" with a ported 5100 cab?

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post #3 of 15 Old 10-26-2013, 12:05 PM
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The problem isn't your sub. If you want better response.

1) find better placement options
2) EQ your subs before running XT32 so that they're flat. You have some roll off or room issues around 30-33hz.

It looks like XT32 is detecting the rolloff of your sub incorrectly.

This is with XT32 running after the subs were EQ'd flat. It can definitely smooth things out some, but if it looks for your subs natural rolloff and wont help below there. Also, turn off dynamic volume and dynamic EQ.

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post #4 of 15 Old 10-26-2013, 12:08 PM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post

just so folks know what you are working with, the s2 is a dual 18" sealed cab with 30mm xmax drivers and 4kw of power.



i'm not sure a pro 5100 is what you are looking for.

what are you trying to "fix" with a ported 5100 cab?


I can understand your sentiments...........................looking to achieve a specific house curve.

I would tend to agree with what most are thinking......................much easier to purchase another S2/S1...................
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post #5 of 15 Old 10-26-2013, 12:12 PM - Thread Starter
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Quote:
Originally Posted by notnyt View Post

The problem isn't your sub. If you want better response.

1) find better placement options
2) EQ your subs before running XT32 so that they're flat. You have some roll off or room issues around 30-33hz.

It looks like XT32 is detecting the rolloff of your sub incorrectly.

This is with XT32 running after the subs were EQ'd flat. It can definitely smooth things out some, but if it looks for your subs natural rolloff and wont help below there. Also, turn off dynamic volume and dynamic EQ.


Thanks............

The second graph is with XT32 and Dynamic EQ/Volume off..........................the problem is not the sub so much, but as you suggested, a room issue in the 25-35 hz region.

There lies the problem.............placement issue. The S2 has no place to go...................I do have placement options in back as I have 4-5 ft behind second row seating.
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post #6 of 15 Old 10-26-2013, 07:48 PM
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Just leave XT32 disabled then and buy another s2. Problem solved.
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post #7 of 15 Old 10-26-2013, 07:53 PM
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Or as I said, EQ first. Get a MiniDS or something. That's trivial to EQ out, but will need more power. I'd try different placement options. Whatever you put where that is currently is going to have the same issues. Adding another in a different location may help as well.
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post #8 of 15 Old 10-26-2013, 08:20 PM
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how big.............................................is.............................................your.................................................room?

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post #9 of 15 Old 10-26-2013, 08:34 PM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post

how big.............................................is.............................................your.................................................room?


Approximately 4400 cf.......
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post #10 of 15 Old 10-26-2013, 08:40 PM
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is your seating position in the center of the room?

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post #11 of 15 Old 10-26-2013, 08:50 PM
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is the room quite long? like 32 feet deep or something?

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post #12 of 15 Old 10-26-2013, 09:28 PM - Thread Starter
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Quote:
Originally Posted by LTD02 View Post

is your seating position in the center of the room?


No.........first row seating is not in middle of room. Room was designed by Erskine Group.......

I have not installed two 10" leveling subs spec-ed in first row columns..........figured I'd use smoothing subs in back capable of keeping up with S2.

Room is 17 ft wide ....25+ feet deep with 10+ Ceiling.
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post #13 of 15 Old 10-27-2013, 09:36 AM
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the reason that I ask is that you seem to have a big null at about 28hz or so.

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post #14 of 15 Old 10-27-2013, 12:06 PM
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Quote:
Originally Posted by LTD02 View Post

how big.............................................is.............................................your.................................................room?
William+Shatner++star+trek+TOS.jpg

I can't be the only one who thought that.

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post #15 of 15 Old 10-27-2013, 12:21 PM
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the cancellation at 28hz might be related to a boundary at 10 feet distance as that would correlate to a 1/4 wavelength.

1130 ft/s / 28hz = ~40 feet wavelength.

the picture on the left a bit down the page shows how this could be............................................the case.

http://realtraps.com/art_waves.htm

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