Maelstrom-18" Gen II Landed

[SteveCallas]

While the sims may not show a perfectly flat response with a larger enclosure, do remember to go large enough as to be able to use an adequately sized port (at least 8" diameter).

[mdrake]

Maelstrom just landed- and already being shipped! Thank you Kevin for the excellent service: feedback via email, updated thread on HTS, and very prompt shipping. (if the driver performance is similar to the customer service, then I'm in for a shocker

Kevin's customer service is the BEST is in the biz. My Mal-X is on it's way.. can't wait.

Matt

[vili]

I'm excited. Mine shipped out Monday, should have it this coming Monday the 29th. Too bad Kevin lives on the other side of the continent as me...UPS takes a whole week.

[clausdk]

With the new driver I get 128,7L box at QTC 0,707 and Fs 33,93hz
Old driver I get 201,1L at QTC 0,707 and Fs 30,76hz

Can anyone confirm this?

Ok my dilemma is I've already build a box at around 170L and still missing the driver since I live in Europe.

If I use a 170L box with the new driver I get a QTC of 0,645 and Fs 30,88.

How will this hold up? any comments?

I've build 2 boxed and one of them is sitting at a pro painter right now getting its high gloss white finish

Not sure yet if I get Gen I or II here in Europe, I've wrote Kevin asking if its Gen I or II inbound for Europe.

[Mike P.]

Your modeling is correct. The Gen II in a 170L box will be fine.

[ironglen]

Kevin Haskins wrote:

You need a smaller box. Anytime you get that lazy hump curve your trying to use the driver in a bigger box than it needs.

The GenII Maelstrom is suitable for slightly smaller boxes. I'd say 10ft^3 (280L) is a plenty large box at the higher end of the scale.

Kevin Haskins
Exodus Audio

I too had a nice, flat curve modeled. Should I downsize my 16.3ft^3 (465L) 14.5Hz cylinder? Or should I lower the tuning a notch (1-3 Hz) and retain the volume? Or both? I'll be finishing this week

[Mike P.]

Do you have the sub yet? Is it Generation I or II?

[Kevin Haskins]

ironglen wrote:

I too had a nice, flat curve modeled. Should I downsize my 16.3ft^3 (465L) 14.5Hz cylinder? Or should I lower the tuning a notch (1-3 Hz) and retain the volume? Or both? I'll be finishing this week

I'm not a huge box kind of guy (obviously this is relative). The main reason for going with a large box is due to the need for large ports. If your going to tune a Maelstrom down around 16-18Hz it requires a massively long port and that forces you to push the box size up to achieve a suitable design. But it depends on what your trying to accomplish. If you want to run a LLT design, you push the size up and tune it very low. With 8" and larger ports, you quickly get into port resonance issues in the bandwidth of the device. I prefer to keep the ports reasonable in length, less than 30" or so and tune up around 18Hz. My rational is that most of the action is up above 20Hz and the stuff down real low just rattles stuff in my room (in a way I don't like).

If you follow that approach, you don't need 14-16 cubic foot boxes. You can get by with 10-11 cubic foot boxes which are already very big. You don't loose any headroom from 18Hz & up, in fact you gain some. You maximize the output potential in the range that your most likely to need it.

Obviously, there are people who disagree with those objectives. That is the nature of the beast. Different people have different priorities. There isn't a wrong or right. You just have to figure out what is most important to YOU and design accordingly. For me, I'm not interested in reproducing 10Hz at reference levels.

Kevin Haskins
Exodus Audio

[ironglen]

I had modeled (and cut the 24" tube) for a Gen 1, but will have a Gen 2 arriving Monday. Looks like Kevin answered my question: it's up to me to decide what I want to achieve and the design will follow. I am looking to reproduce all of the content recorded in movies, as well as achieve greater spl than my svs cs12: the LLT size isn't a problem.

[A9X]

Hi Kevin, now the Gen-II specs are up on your site, could you please tell me the specs for G-I with the coils in series? I've just obtained one of these and I will have no chance to measure it for a few weeks and would like to play with some enclosure ideas in the interim, before sawdust making.

The only T/S I have come from Audiomarketplace and they are quite a bit different from G-II. Cheers

[Mike P.]

If you have WinISD, the parameters are here:

http://www.hometheatershack.com/foru...pro-files.html

[A9X]

Mike P. wrote:

If you have WinISD, the parameters are here:

http://www.hometheatershack.com/foru...pro-files.html

No, I hate WinISD. Can I just have the numbers please?

[Mike P.]

These are series wiring specs using the Auto Calculate feature. It says Parallel at the bottom, that's a bug in the program.

[A9X]

Thank you very much. Radically different results from the previous sims.