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DIY 15" Dayton Titanic MKIII question

400 Views 8 Replies 3 Participants Last post by perpetual, Dec 18, 2005

perpetual

Discussion Starter · Dec 18, 2005

I posted this on the Titanic MkII thread but I got no resposes, so I'm giving it another shot.

I just did some testing and In the enclosure that I have it, I get exactly 100dbs at 15Hz and 103Hz at 20Hz with a sine wave (measured with the RS meter [uncorrected values] at 11ft from the sub. I wanted to see at which level the driver would bottom out, but I can't. I raised the volume of the receiver and the level sub out to their max to achieve this output, but the driver didn't bottom out.

What does this mean?

Does this mean that the driver is not performing to its best in this enclosure?

It is tuned to around 19Hz - 20Hz without any filters or anything BTW.

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SteveCallas

· #2 · Dec 18, 2005

What does this mean? You should be dancing with joy

Those are some pretty serious uncorrected values, even though I'd have to guess that 15hz figure is chock full of distortion. For whatever reason, your sub seems to be basically bulletproof, enjoy it.

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perpetual

Discussion Starter · #3 · Dec 18, 2005

I am dancing with joy. Is just that when I was building it someone in this forum told me something about the roll off or somthing. I'm pretty happy with it and it sounds pretty good. I was also thinking about getting the SMS-1 to be able to equalize it with my other two smaller subs.

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steve nn

· #4 · Dec 18, 2005

What design did you go with perpetual? If it's sealed the encloser itself is most likely keeping you under and if it's vented.. your power supply is keeping you under?
Quote:

I posted this on the Titanic MkII thread but I got no resposes

I replied in my Thread with a question just in case you missed it??

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SteveCallas

· #5 · Dec 18, 2005

What amp are you using? If it is a plate amp, it probably has a filter built in. Either way, you're getting pretty good output and I'd say you have nothing to worry about.

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steve nn

· #6 · Dec 18, 2005

Quote:

Either way, you're getting pretty good output and I'd say you have nothing to worry about.

Most definitely! Going the full distance with out going over the top is a good thing. I would think your dang close though.

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perpetual

Discussion Starter · #7 · Dec 18, 2005

It is a ported design. Its being powered by a Crown XLS 402 in bridge mode 1140W RMS. The pics are on my signature. When playing the 15hz sine wave the port became a fan.

steve nn, I did missed the question sorry about that.

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steve nn

· #8 · Dec 18, 2005

Quote:

It is a ported design. Its being powered by a Crown XLS 402 in bridge mode 1140W RMS. The pics are on my signature. When playing the 15hz sine wave the port became a fan.

Yikes! That thing can take a whoopin! I was also very impressed with the output capability of mine, but found the enclosure design lacking. Maybe some poly would have alleviated it, but it's boxed up and ready to make it's trip back. Your vented enclosure sounds like a real keeper though.

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perpetual

Discussion Starter · #9 · Dec 18, 2005

i'm pretty happy with it overall. As you can see from the pics I first tried a sealed enclosure, but I liked the ported one more, even though its larger and weights a lot more. The port was pretty impressive too. I had never seen a 6" port and an elbow.

Thanks for your responses.

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