MK Theater - Here is your subwoofer package on WIN-ISD

[craigsub]

MK is thinking about putting 8 CS-18.2's into his theater system. We are going to be offering all of our 18 inch packages as passive units for those who want to use pro-amps and outboard eq.

Think of it as DIY performance and pricing without all the work.

Here is the WIN-ISD graph for the SPL on MK's OCTO-PACK CS-18.2 This is with 1000 watts per unit:



And here is the adjusted for TWO METER OUTDOOR MEASUREMENTS (all under 10 % THD - peak values will actually be 2 dB higher):

10 Hz: 112 dB
20 Hz: 124 dB
32 Hz: 132 dB
50 Hz: 139 dB
63 Hz: 141 dB
80 Hz: 142 dB
100 Hz: 143 dB

Group delay is under 6 MS down to 10 Hz.

These subs will retail for $1048 each, or $8384 for 10. Knock off the 10% discount for an order this size, and we are looking at a package at $7546.

If one runs the math on this, (and NOT using "peak numbers" like most others do), this sub package will deliver in excess of 136 dB average from 20 to 80 Hz.

Also .... please note, this is with no eq. applied.

For the real bassheads here ... this is the LMS-5400 tested in cooler temps by Ilkka (cooler temps add to SPL when measuring ...)

Each unit was in an appx. 4 cubic foot cabinet with a Crown CE-4000 amp rated at 3600 watts into 4 ohms.

The pink graph line from the 115 dB "sweep" is under 10 % THD down to 20 Hz. At 10 Hz, it was just under 25% THD. The 118 dB sweep had THD exceeding 25% from 35 Hz and lower, so I left that out.

At this level it delivered the following SPL for a single and adjusted for 8 LMS-5400's in ():

10 Hz: 92 dB (110 dB)
20 Hz: 105 dB (123 dB)
32 Hz: 114 dB (132 dB)
50 Hz: 115 dB (133 dB)
63 Hz: 115 dB (133 dB)
80 Hz: 115 dB (133 dB)
100 Hz: 116 dB (134 dB)

Anyone can check up on me by looking at this link to Ilkka's test:

http://www.hometheatershack.com/forums/subwoofer-tests-archived/8155-diy-tc-sounds-lms-5400-18-sealed-100l.html

[sbdman]

So, this is the equivalent of a 6' dia sub, with 8000 watts. Truly, diabolical! Think even the DIY guys are gonna be without words on this one.

Talking about "taken it to a whole 'nother level!"

Let's see, next step;
I'm getting visions of Dr. Frankenstein selling Dr. Strangelove a dilithium crystal power supply powering up the surfaces of the Michigan Stadium Bowl to destroy the Death Star with shock waves? Guess that would be more than $10K, though, and would be hard to fit in MK's HT.

[D.T.MIKE]

Wow talking about going to the extreme MK Theater might have to put a warning sign on the entrance door that reads something like "enter at your own risk"! :saywhat: WOTW played back at that system would have people diving for the floor in fear...I like it!

[Ray3]

Wow talking about going to the extreme MK Theater might have to put a warning sign on the entrance door that reads something like "enter at your own risk"! :saywhat: WOTW played back at that system would have people diving for the floor in fear...I like it!

Yeah, but that plan would only work until the floor disintegrates! :jiggy:

[Nfrasotoo]

This is incredible! I can't imagine four of them in a room that size. Heck, I can't imagine four of them in a room my size (6000cu+). :crazy:

After getting this setup in room and accounting for room gain, what kind of outboard EQ would be needed (or what kind do the Dayton amps apply)?

Pair of Danley DTS-10s

Tom Danley: "So, anyway as of now, using a sine wave, one DTS-10 in half space, at two meters, reaches the following levels;
CEA 2010 Max RMS Output @ 2mtrs." +6dB (adjusted for MK's pair)

12Hz 108dB
16Hz 114dB
20Hz 115dB
25Hz 117dB
31.5 120dB
40Hz 120dB
50Hz 123dB
63Hz 121dB
80Hz 133 dB

Ultra low AVG 20-31.5Hz: 117.3dB
Low Bass 40-63Hz: 120.3
20Hz-80Hz AVG: 121dB

and the Octo CS-18.2s

10 Hz: 112 dB
20 Hz: 124 dB
32 Hz: 132 dB
50 Hz: 139 dB
63 Hz: 141 dB
80 Hz: 142 dB
100 Hz: 143 dB

136 dB average from 20 to 80 Hz.

I don't know how comparable the two measurement methods were other than both being half-space and 2m- but is it just me, or can quad CS-18.2s outperform the DTS-10 pair just fine? It seems like even a co-located pair behind his screen would match up well with the output he has now.

Not that there's anything wrong with gobs more. :peeping:

[Mktheater]

We will soon find out. I am starting with a pair. I think it will take quads to surpass the DTS-10's. If everything goes well I will change them out to all 18.2's. The CS 18.2 have to sound as good though as spl is not the only factor. I had 8 18's before and the Danley's are better. I know the CS18.2 uses better drivers so lets find out for sure.

[Fatawan]

For the real bassheads here ... this is the LMS-5400 tested in cooler temps by Ilkka (cooler temps add to SPL when measuring ...)

Each unit was in an appx. 4 cubic foot cabinet with a Crown CE-4000 amp rated at 3600 watts into 4 ohms.

The pink graph line from the 115 dB "sweep" is under 10 % THD down to 20 Hz. At 10 Hz, it was just under 25% THD. The 118 dB sweep had THD exceeding 25% from 35 Hz and lower, so I left that out.

At this level it delivered the following SPL for a single and adjusted for 8 LMS-5400's in ():

10 Hz: 92 dB (110 dB)
20 Hz: 105 dB (123 dB)
32 Hz: 114 dB (132 dB)
50 Hz: 115 dB (133 dB)
63 Hz: 115 dB (133 dB)
80 Hz: 115 dB (133 dB)
100 Hz: 116 dB (134 dB)

Anyone can check up on me by looking at this link to Ilkka's test:

http://www.hometheatershack.com/foru...aled-100l.html

Shouldn't you be using 16 LMS-5400's for an apples to apples comparison? Then it looks like:

10 Hz: 92 dB (116 dB)
20 Hz: 105 dB (129 dB)
32 Hz: 114 dB (138 dB)
50 Hz: 115 dB (139 dB)
63 Hz: 115 dB (139 dB)
80 Hz: 115 dB (139 dB)
100 Hz: 116 dB (140 dB)

[craigsub]

Shouldn't you be using 16 LMS-5400's for an apples to apples comparison?

Let's do the math:

A CS-18.2 in passive form will sell for $1048. The discount is 5% for 2-5 units and 10% for 6 units and above.

Eight CS-18.2's will retail for $8384 less $838, for a net of $7456.

Parts Express sells the LMS-5400 for $899.10 each.

Eight x $899.10 = $7192.80.

This gets one 8 raw drivers. Now one has to build 8 enclosures, which will be a daunting task to say the least, plus expensive. :)

[Mktheater]

Actually I would think using the same amount of subs that equal in price. How much is a LMS ultra subwoofer? It was also noted that Danley did not do the test correctly, or the same. The Danley now sells for $3000 but the kit price was ridiculous for the performance. It was cheaper for my 2 kits than my 8 sealed eD 18's.

[Mktheater]

Yeah, but that plan would only work until the floor disintegrates! :jiggy:

My floor is concrete.

[sbdman]

My floor is concrete.

Then I'd be concerned with your furniture disentegrating.

Really enjoyed your SHO-10 review, I'm sure this will be even more fun for me!

[Mktheater]

Then I'd be concerned with your furniture disentegrating.

Really enjoyed your SHO-10 review, I'm sure this will be even more fun for me!

Thanks. They will be in a dedicated theater which is built to not make a noise during high spl movie watching.

[Nfrasotoo]

We will soon find out. I am starting with a pair. I think it will take quads to surpass the DTS-10's. If everything goes well I will change them out to all 18.2's. The CS 18.2 have to sound as good though as spl is not the only factor. I had 8 18's before and the Danley's are better. I know the CS18.2 uses better drivers so lets find out for sure.

Makes sense to me- as they say, there's only one way to find out! :big chug:

[edgebsl]

This is insane!

And I love it!

[tesseract]

I know, it is insane! That is what I thought at first. It will be fun for us all. "thumbsup: