8x 18" LMS Ultra 5400s in 4 sealed enclosures - Page 7

Originally Posted by stgdz

Bosso, is notnyt gaining/losing anything by going with the array setup instead of an opposed setup? He is collocating his subs though.


Also I have talked with scott over at fi, he said to take a look at the Q series woofer and possibly upgrade to the high Qts and inductance ring.

Originally Posted by notnyt

I went with the array setup so I don't have to deal with any phase issues and also I didn't want to fire any drivers at my walls Dual opposed will provide less cabinet vibration, but these things are so heavy it's not really an issue.

Originally Posted by stgdz

Bosso, is notnyt gaining/losing anything by going with the array setup instead of an opposed setup? He is collocating his subs though.


Also I have talked with scott over at fi, he said to take a look at the Q series woofer and possibly upgrade to the high Qts and inductance ring.

Originally Posted by bossobass

IMO, anyone who thinks 2-front-firing-LMS-18s pumping at 3" peak-to-peak won't rock a box is kidding himself, the weight of the box notwithstanding. As to how much that affects performance vs other choices, no one I'm aware of has explored different configurations to extract maximum in-room performance from the LMS drivers.

I prefer to use configuration and the room to get maximum performance from considerably less expensive, shorter throw drivers, in boxes of less weight and size.

The bottom line here is that using 8-18s makes most of the discussion moot. What notnyt (or anyone else) might be losing in maximum performance, he's more than making up in using that much displacement in big boxes.

For example, there was a comment further back regarding 120dB @ 10 Hz being "reference level". It's not. There is no source I'm aware of that requires 120dB @ 10 Hz @ reference level. More like -10dB below that.

notnyt has 20 times more than he needs at 10 Hz (and 40 times more than the THTs with magnitudes less THD).

I'm with Penn regarding Fi offering a higher Qts driver, but not stating what the Qts is. But, the bottom line for me is the increase in mounting depth of Fi's longer throw drivers (& the LMS, et al), reduces options for box shape vs other choices when designing dual opposed subs.

I once asked Scott what the inductance ring actually translates to in FR above 70 Hz. He let the other guy (forget his name) answer my e-mail, who asked why I cared what happens above 70 Hz because HE crosses his home subs at 50 Hz.

His credibility dropped a few notches with that answer, and he never answered the question, so I have no comment on the addition of the "inductance ring".

Bosso

Originally Posted by bossobass

I once asked Scott what the inductance ring actually translates to in FR above 70 Hz. He let the other guy (forget his name) answer my e-mail, who asked why I cared what happens above 70 Hz because HE crosses his home subs at 50 Hz.

His credibility dropped a few notches with that answer, and he never answered the question, so I have no comment on the addition of the "inductance ring".

Bosso

Originally Posted by bossobass


I'm with Penn regarding Fi offering a higher Qts driver, but not stating what the Qts is. But, the bottom line for me is the increase in mounting depth of Fi's longer throw drivers (& the LMS, et al), reduces options for box shape vs other choices when designing dual opposed subs.

I once asked Scott what the inductance ring actually translates to in FR above 70 Hz. He let the other guy (forget his name) answer my e-mail, who asked why I cared what happens above 70 Hz because HE crosses his home subs at 50 Hz.

His credibility dropped a few notches with that answer, and he never answered the question, so I have no comment on the addition of the "inductance ring".

Bosso

Originally Posted by Warpdrv

Great Answer....

I guess his "other guy" will be the only one using those subs...?

Originally Posted by notnyt

I also noticed the LMS are cleaner as frequency increases as opposed to the maelstroms. Is that related to the shorting ring?

Originally Posted by Warpdrv

You want to see some serious box movement ?!?!?
Push the XXX to full roar in a 6^3 box w/4000w.... that thing was like a jumping bean... all over the place....

Originally Posted by bossobass

I'm with Penn regarding Fi offering a higher Qts driver, but not stating what the Qts is. But, the bottom line for me is the increase in mounting depth of Fi's longer throw drivers (& the LMS, et al), reduces options for box shape vs other choices when designing dual opposed subs.

I once asked Scott what the inductance ring actually translates to in FR above 70 Hz. He let the other guy (forget his name) answer my e-mail, who asked why I cared what happens above 70 Hz because HE crosses his home subs at 50 Hz.

His credibility dropped a few notches with that answer, and he never answered the question, so I have no comment on the addition of the "inductance ring".

Bosso

Originally Posted by Ricci

No doubt.


Bosso,
That would be Nick. Scott is great to deal with but is too busy to get a hold of usually. Nick talks to everyone like they are a kid trying to get a ported 18 in the back of their mustang. I have tried to ask him some questions about their drivers and configurations before and he answered me roughly the same way, which is like you are dumb.

Originally Posted by notnyt

I also have four more replacement fans on the way.

Originally Posted by notnyt

All my relay boxes are built and running. I'm just waiting on more speaker wire and the fans to come in.