So info on these subs subs is just about nill - seems to have all dried up years ago. It doesn't look like anyone is using these anymore for some reason...

Anyway, I have 2 of them and was thinking about putting both in my Max. I have 2 Eclipse XA4000 amps, so each sub would be getting about 750w rms(admittedly not enough); however, I think I want to do a vented box sicne when I had 1 tc in there in a 1^ft seald(tc specs for SQ) box w/ 1 XA4000, the results were less than spectacular...

When I first got the first TC, I put it in a ~2^ft box just to test it with 1 xa, and there was hardly any output at all. Box was waaaay too big. If I did sealed again, I was thinking about trying ~1.25^ft/sub. Maybe having 2 in there would get me the output I need.

If I went vented, I was thinking maybe 2^ft/sub, tuned to around 28hz. I'm not too concerned with trunk space or anything, but I don't have a whole lot. I can get about 4^ft if I put the subs in the box backwards...

I was basically looking for anyone who had experience with these drivers to let me pick their brain. I really like these subs and amps for some reason, but I don't want to be disappointed again. I'm familiar with box building/designing but for some reason these things model weird so I am looking for real-world advice please.

By "modeling weird", I meant that in winISD, optimal sealed box seems to be 0.442^ft, and optimal vented looks to be 0.675^ft tuned to ~30hz. Now I realize these do not take into account cabin gain, but I just can't imagine building a vented box less than 1^ft and having it sound good. I used the specs below from Subguts - and from the other info I have on the TC2K's, they look to be correct. The specs in bold are the only ones I put in WinISD, so maybe I messed something up...

100 Newtons2/watt Motor Force
800 Watts Sustained Power
3" Anodized Aluminum Voice Coil
Single Dish Aluminum Cone
1" Wide NBR Surround
190 Ounce Magnet Structure
28mm XMax
10" Diameter Suspension System
Custom Cast Aluminum Frame
Quick-Detach Top Assembly
12" TC-2000
Qts 0.264
Qes 0.284
Qms 3.72
Fs 20hz
Res 3.12Ω
Ls 2.41mH
Lp 5.62mH
Rp 4.86Ω
Dia 240mm
Vas 77.3l
mms 265g
cms 228.5um/N
bl 17.2T*m
Spl 85.5dB

So when I see all these TC's in boxes ranging from 2-4^ft it confuses the hell out of me. The one I have in a 1^ft sealed box sounds ok but the output just isn't there - I don't really think putting it in a vented box almost half that volume is going to get me there either though...

 

From my understanding the tc2k is better suited for a small sealed box. I would suggest you go with a 1.5 cubic foot sealed with poly fill or make a 2 cube sealed and fill it with some wood to see how it sounds. Once you get the optimal output and sound q, leave it at that volume.

You may really have an issue with power more than anything.

 

Yeah - I tried that already and it was worse than the 1^ft sealed box I have one in now...

If I go sealed again, I think I will just build one more 1^ft box and put the subs in backwards to get a little more enclosure size. That should leave me at ~1.2^ft/sub sealed, and I actually like the way the subs' ***'s look

But before that - I think I am just going to put one of the TC's in one side of my ported box that I currently have my Earthquake DBX-12's in. That would give one TC 1.625^ft tuned @32hz. Hopefully that will give me an idea of where I'm at output and FR wise...

 

Did you ever check the coils of the subs? I've seen some that were called sinle 4's which were actually 8 ohm. Might want to get a reading on them and see where they sit on each coil.

 

No I didn't - that would suck though. I have the DVC versions, so I would have dual-8's - yuck! I don't think I have enough power as it is, I would really hate to cut it in half again with 8ohm coils...

At any rate, they are supposed to be dual 4ohmers(actually 3ohm)...

 

I would check the coils see where they sit.

 

OK - checked the coils yesterday and they both measured out at ~3.15 ohms, so I am good there. I also fixed my problem...

I have heard conflicting reports that the TC2000 models like small sealed boxes, and I have also heard they like large ported boxes - so what the hell I was extremely disappointed with the output from this sub while it was in the 1^ft sealed box that I built for it. So much so, that I took it out and put my Earthquake DBX-12's back in my Maxima, in the vented box I made for them that gives each 12" 1.625^ft after port/brace/driver displacement, tuned to about 33hz.

Yesterday, I decided to throw my TC2k in one side of that box to see what was up, and holy $h!t am I glad I did! I now have a bridged channel of one XA4000 going to each coil of the TC(about 700wrms), and I am very, very impressed with my decision. So much so, that I removed my other Earthquake DBX-12 amd put both of them in my wife's car in a sealed box for her

In the end, I think I simply do not have the power right now to push these things in that small of a sealed box, but they have more than enough "snap" for me in the vented box. And might I add - these things will dig loooooowww....

I can't wait for my other one to get here!