I really hope that 270L TC-2000 sub can make it.

 

Yes, that subwoofer is done (I've actually listened to it), and the guy lives pretty close to me. There are some small transportation problems but we WILL overcome them. :boxer:

I will definitely like to see that 90L sealed TC-2000 15" being compared to this large ported version. I have a feeling that I am not the only one...

There is also a ported ~500L RL-p 18" in the works. If the driver arrives in time, it will be there too.

 

yo....if you pay for insurance and shipping, plus a dialy stipend for the number of days I would be without one of my towers, you are more than free to take one of them and put it in your shootout!

 

Oh can I? :sarcastic:

 

Well, very exciting to see how the famous brands compare to the DIYs!!

Blaser

 

I will definitely like to see that 90L sealed TC-2000 15" being compared to this large ported version. I have a feeling that I am not the only one...

Oh wow, yeah, that would be fantastic. About as close as one could get to comparing the performance of good designs for both alignment using the same driver.

 

Im also looking forward to the results, since there is a lot of condenders in the lineup im curious about

 

Will you be using a control subwoofer to check the stability of test conditions over the test period? I think Tom V suggested this.

 

BK Monolith-DF (same unit was tested last time, will be used as a reference)

 

You can borrow my Behemoth if you'd like... :scratch: :huh:

 

If only we'd live a little bit closer to each other... :hissyfit:

 

Here's the picture of the LLT in its home.

- TC-2000 15"
- 270 L
- 16 Hz / 6" aeroport
- 2 kW

 

Is it the SVC or DVC? If it is the DVC, wried in series or parallel? What amp is being used?

 

It is SVC, so 4 ohm bridged.

The amp is a Novacoustic (Solton / Craaft Audio) X 2000 clone. Measured output of ~2 kW into 4 ohm bridged. My own sealed 2x15" sub will have two of these. :devil:

We are going to have two dedicated 16A/230V lines for these puppies. No line sag problems. :T

http://www.novacoustic.com/html/x_amps.html

 

Suuuhhhhhweeeeeeet. :bigsmile:

 

So Ilkka, ready for the big day tomorrow? :bigsmile:

 

Weather looking good in your part of the world tomorrow? If it all goes well tomorrow, when do you think you'll be able to post some findings?

 

I don't know where he lives in Finland, but the weather looks OK there.

 

Let's all wish the best for the Great Ilkka tomorrow and the day after.... I think he may not post the results before 1 week or so:hissyfit: .... Up to now, avtalk did not post their result...

 

We are ready to begin! :jump: And luckily the weather is fine too. A little bit chilly, but as we already know, the subwoofers like it.

Can't say anything about the results yet. They are posted when they are done. You can't probably imagine how much manual work that requires... :dizzy:

 

Good luck with the tests. I hope they are going well.

 

First day is happily behind us. The weather was fine and we got some nice results too. Here are a few teaser pics and strictly unofficial CEA 2010 standard max clean peak output results (subtract 3 dB for more common RMS values). NA means 'not available', which means that the subwoofer wasn't able to output considerable amounts of sound pressure at that frequency. You should notice that when comparing the average values.

The Velodyne SPL1200-MK2 couldn't make it due transportation problems. Maybe next time.

 

Thanks for the pics and unofficial results! Looks like a beautiful day there in Finland.

At least in terms of output, it looks like the DIY guys are more than holding there own.

 

Nice, keep up the good work!:bigsmile:

 

One interesting note. The large TC-2000 15" based sonosub was clipping its ~2000W amp at 40 Hz and above. :scared:

 

Those results look about dead on for the TC-2000 too, pretty much what one would expect. Fantastic. Thanks for giving us a little taste of what is to come. Keep up the good work man, we all really appreciate you spending your weekend doing this (your friends and those who donated a sub to test too!). :bigsmile:

And wow about the amp clipping!

 

The TC-2000 DIY sub is a freek!!

Ilkka.... one word!! ::hail:

 

I would like to thank you for posting this unofficial results, which only make us feel as if we were with you at the tests. You could have simply waited for a week or two and take your time before informing anything about what you have.... But understanding people are very impatient, you have taken the time to post something to help us be patient....

This is very highly appreciated Ilkka!! Not many guys do like you do.... know what I mean:whistling:

I have 1 ton questions or 2:R , but will of course wait for the official results and leave you concentrate on what your doing now!!

Best wishes for tomorrow:T

Blaser
Thanks!

 

Illka,
Have you ever considered running the powered subs in a passive mode and connect them to the same amp as you use for the other passive subs? By using the same power source with the same settings, you would then be comparing the drivers, enclosures, and alignments. It would also expose if the OEM has under powered the amp or over compensated the control circuits or limiters.

 

Aside form being a lot more work, I think many may find that less valuable. The point here isn't to compare drivers/enclosures, it is to compare subs.

 

Very good post Kevin... And wellcome to the shack!!

Ransac, in addition to Kevin's point, I would ask you if for example you would like Ilkka to send 2000 Watts to a Pb-12 NSD??:scratch: If the answer is no, then how much would be acceptable?

When dealing with a DIY, we know what the driver can and cannot take not only speaking of power, but most importanly speaking of Peak excursion!!

How can you know for ex. the excursion limited frequencies of the NSD? Is it only below tuning? Not really! Where and how much power input will make it reach peak excursion above tuning...:dunno: . I can't be sure of that.

I think for these reasons it will not be possible/ meaningful...

Blaser

 

Yeah, the way Ilkka does it now is really the only way (and the right way). Commercial sub buyers use the subs as is. The second you physically change the sub (voiding the warranty too) the tests become sort of pointless.