4 LMS 5400s in my enclosures. Doable?

I started a new thread because this changes things a bit. I'm now $1700 over budget, but these things you understand.

I have a few concerns about the LMS.

Can they be mounted vertically as in my current enclosures? I've heard some drivers are not meant to be mounted vertically.

Would you guys order from Parts Express?

In the event that something goes awry with one of the drivers, does LMS handle any repair needs?

There's a 10Hz HPF filter on the input stage of my Crown Marco 5000; does anyone know how to defeat it? If not this is a real limitation to the HT aspect.

Do you think the Crown/2 LMS/14cu ft/ dual opposed/sealed, is a decent marriage?

Lastly (for now I'm sure), do you think that a 3/4" thick Baltic adapter plate will be rigid enough, or should more material be used?

Just hung up the phone with Crown, GREAT company BTW. Have never had an issue getting a hold of tech support. Kevin is the man.

There's no HPF in the Macro Tech, but it does roll off at 6db per octave below 20hz and it will detect such inputs a DC resulting in its indicators flashing. That explains some things I've seen during "The Dark Knight" and "The Matrix: Reloaded".

Kevin said the Crown will pass the audio and the response can be EQd "if I have an EQ that will do it"

Could anyone model 2 LMS in 14cu feet sealed? I wonder how much boost they will need below 20hz before the amplifier is considered.

Hey Wi, I've laid the boxes on their sides and it sounds like dirt. Output goes down, response gets hilly, and the mechanical noise from the house is noticeably greater.

That's a sexy graph for both drivers. Thank you for running that. It will be interesting to see what Ricci has to say about your Zv3.

I've got my finger on the order button. $3700!

Just a comment about sensitivity.

My Misco's sensitivity is 95dB SPL with 2.83 V input measured at 1 M.

The TC Sound's sensitivity is 89.7dB of SPL. I'm guessing that's 1 W at 1 M.

So my Miscos are more sensitive, especially above 30 or 40 Hz, but I have to think that the LMS's motor, xmax, and overall quality will produce better sound, better output, and better response at all frequencies after EQing. Is that a fair assessment?

Hahaha, right? I'm still waiting for a few "gifts" myself.

So, laminated .75" BB to 1.5". I really don't want to make these enclosures any bulkier, but I don't really have a choice, unless of course I lop off the current baffles and fabricate new ones...

I'd be grateful for any suggestions

They are on their way

They should be here Thursday.

Now to modify

Is anyone concerned that my adapter plates will leave only 6.5" between the down firing drivers and the floor?

They're here! I've assembled and tested two drivers in free air. The spiders are making a lot of mechanical nosie. All I have is music audio, but the fantasy adventure album with the infrasonic t Rex effects is moving the cones and I hear much less noise during that. :/ I'm going to finish assembling them and if they all behave the same I'll chalk it up to a free air anomaly.

Warranty states clearly that spider sag due to up down mounting is not covered, but Thilo wrote me that he is not concerned with my arrangement causing sag. Has anyone ever mounted the down up outside a car? What do you guys think about sag with these drivers?

No where near that kind of excursion. Just sounds buzzy and fuzzy from around 60 and up. I wouldn't think there would be audible mechanical noise from any part of the driver within its operational limits.

Yep, they came I am surprised at the mechanical noise but they all do it, and with my head in the cone they are uber smooth.

Any opinions on driver sag would be greatly appreciated!

Ahhh, I bet you're right. I'll check when I get home.

That was it.

Could that have damaged them?