Eclipse Thiele/Small, difficult to find!

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coppellstereo

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Posted: March 30, 2006 at 7:52 PM / IP Logged

Wow, thanks for typing that for me!

With out changing anything, sealed box is showing F3 @ 68Hz. It also goes off the graph at -30db / 12Hz.

That seems bad in relation to what you just said.

stevdart

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Posted: March 30, 2006 at 9:05 PM / IP Logged

You need to change your chart to make it more realistically useable. You shouldn't be looking at -30 db. Right-click on the chart, select properties, select Transfer Function Magnitude. Change the start and end to -6 db and +6 db. Or you could use -12 and +6 db. No more than that is necessary.

Are you working on that Eclipse sub? Check your database editor for parameter input. Fs is 22 according to the Eclipse site I linked to on page 2. Fs shouldn't read that high, it should come up at 55 Hz with the default sealed response for the .707 alignment.

That's why this sub looks so bad sealed. But we have insufficient parameters to work with. This is a case where hearing from the experienced re: that particular sub would do a world of good.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

coppellstereo

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Posted: March 30, 2006 at 9:22 PM / IP Logged

I have it in a small sealed enclosure, it sounds great. But I wanted to see if I could get lower freq. response by making a larger enclosure.

stevdart

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Posted: March 30, 2006 at 9:34 PM / IP Logged

Using the supplied parameters, making the box larger will not result in deeper bass where you want it, at F3. And it very quickly corrupts the Q when you get larger than .9 ft^3. According to the results I see, the deeper bass will be had by porting. But if you have this set up now with plenty of power, and given that you can't get hold of a good list of parameters, you might consider just leaving this one alone. Small sealed with a lot of power is what they designed it for.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

coppellstereo

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Posted: March 30, 2006 at 9:42 PM / IP Logged

very cool. The box is 13x13x13

Minus driver displacement 1.15

Should I try a smaller box to see how it sounds?

I put my girlfriends SW8122 in a 1.25 cuft box - maybe I should have made it smaller!

stevdart

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Posted: March 30, 2006 at 9:49 PM / IP Logged

Yeah, most definitely. It's easy to displace more airspace in your present box using various methods. Figure out a way to load in defined cu. in. blocks of displacement until you decide on what sounds best, then install a permanent displacement solution into the box. The bad part is having to unload and load the driver each time to gain access to the inside, but it beats building box upon box until you find the right one!

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

coppellstereo

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Posted: March 30, 2006 at 10:31 PM / IP Logged

Nice idea!

Anyone have more input on these specific drivers?

Eclipse SW9122

SW8122

haemphyst

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Posted: March 31, 2006 at 9:24 AM / IP Logged

I'll post later... I have the SW9122

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

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Eclipse Thiele/Small, difficult to find!

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