MartySub Flatpacks - Page 13 - AVS Forum | Home Theater Discussions And Reviews
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Old 02-14-2014, 07:02 PM
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Chalugadp,

Thanks for jumping in head first and getting the cube built! I can't wait to hear more of your opinion after extended use. Especially curious as to which one you think is better suited for someone who is 50/50 music and movies....keep up the good work!
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Old 02-14-2014, 07:02 PM
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Quote:
Originally Posted by LTD02 View Post

"Indeed Stereo Integrity confirms that the power rating for this driver is based on the mechanical overload not what the coil will handle thermally. They recommend 600w and no more for this driver. The very compliant suspension results in little power being needed to move the driver to full stroke. SI's recommendations for this woofer make sense in light of this and the driver will not make much use of more than 5 or 600w of power without getting into trouble. Depending upon the particular enclosure design more power could possibly be used but careful measurement and simulation would be needed to assess the wisdom of applying more power."

http://www.data-bass.com/data?page=driver&id=46

folks are running those subs with that power with no problems and great results. just don't put full power sine waves on them. that is abuse, not use.

I like the part where they stopped testing @ 118V, what is that like almost 3500W?
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Old 02-14-2014, 07:16 PM
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Just ordered 2 SI 18s for this build!!!!
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Old 02-14-2014, 07:19 PM - Thread Starter
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Just ordered 2 SI 18s for this build!!!!
Nice !
Watching Prometheus right now with one. Can't imagine two.
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Old 02-14-2014, 07:22 PM
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Nice !
Watching Prometheus right now with one. Can't imagine two.

I think thanks to your build stereo integrity is going to run out of the subs.
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Old 02-14-2014, 07:22 PM
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Quote:
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Nice !
Watching Prometheus right now with one. Can't imagine two.

Hey don't tease, a full report after the movie is expected wink.gif
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Old 02-14-2014, 07:23 PM
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congrats rex!

Listen. It's All Good.
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Old 02-14-2014, 07:31 PM
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Quote:
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I think thanks to your build stereo integrity is going to run out of the subs.

Yep, my 2 SI 18" D4's shipped today.

Mike

JVC RS600(Calibrated with Chromapure using an iD3), Stewart Cima Neve 2.35 115" diagonal screen, Lumagen Radiance XD, Darbee Darblet, Denon AVR-X7200WA(7.6.4), M&K Speakers, 6 ported 18" subs powered by 3 inuke 6000dsps, Oppo BDP-93, Roku 4, Samsung UBD-K8500 UHD blu-ray player
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Old 02-14-2014, 07:35 PM
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Quote:
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Nice !
Watching Prometheus right now with one. Can't imagine two.

I ordered 2 because I thought if I ever wished I had 2 of them and I only ordered 1 I would kick myself because they weren't matched. Is one on a iNuke 3000 dsp good enough for just 1??? I will have a small HT. Should I only get one and change the order?
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Old 02-14-2014, 07:38 PM - Thread Starter
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Quote:
Originally Posted by Claybe View Post

Quote:
Originally Posted by chalugadp View Post

Nice !
Watching Prometheus right now with one. Can't imagine two.

I ordered 2 because I thought if I ever wished I had 2 of them and I only ordered 1 I would kick myself because they weren't matched. Is one on a iNuke 3000 dsp good enough for just 1??? I will have a small HT. Should I only get one and change the order?
Nope. Two will balance the room out better , diminish nulls and you will work each one a little less hard. You want headroom . One so far is impressive but two will be wow. eek.gif
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Old 02-14-2014, 07:39 PM
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2 is the way to go. not just for the added spl, but more for room modes.

edit: chaluga beat me to it by...6 seconds. :-)

Listen. It's All Good.
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Old 02-14-2014, 07:45 PM
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Chaluga, are you using HP and LP Filters on your cube and, if so, what frequencies are they set to?
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Old 02-14-2014, 07:45 PM
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That's what I thought!

Donny must be feeling better!!!
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Old 02-14-2014, 07:46 PM
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How about four then? tongue.gif
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Old 02-14-2014, 07:50 PM
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I have 2x 12" sealed with 600W each and get 100dB steady in Prometheus when the space ship lands. Marty Cube should be a great improvement.
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Old 02-14-2014, 07:53 PM - Thread Starter
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Quote:
Originally Posted by atabea View Post

Chaluga, are you using HP and LP Filters on your cube and, if so, what frequencies are they set to?
Hp at 20. I have peq at 20hz 3dbs .8q
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Old 02-14-2014, 07:54 PM - Thread Starter
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Quote:
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That's what I thought!

Donny must be feeling better!!!
3 hours sleep can do wonders;)
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Old 02-14-2014, 07:58 PM - Thread Starter
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I have 2x 12" sealed with 600W each and get 100dB steady in Prometheus when the space ship lands. Marty Cube should be a great improvement.

Between 110-112 dbs . Felt nice. When I get my second with uxl18 I should be able to hit 116-118. Of course jbrown will hit 125 dbs:sly:
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Old 02-14-2014, 08:08 PM
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Quote:
Originally Posted by chalugadp View Post

Between 110-112 dbs . Felt nice. When I get my second with uxl18 I should be able to hit 116-118. Of course jbrown will hit 125 dbs:sly:
Will you be doing build pics of the MDF version?? Would love to see pics of each step of gluing the flatpack together.
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Old 02-14-2014, 08:14 PM - Thread Starter
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Quote:
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Quote:
Originally Posted by chalugadp View Post

Between 110-112 dbs . Felt nice. When I get my second with uxl18 I should be able to hit 116-118. Of course jbrown will hit 125 dbs:sly:
Will you be doing build pics of the MDF version?? Would love to see pics of each step of gluing the flatpack together.
Will take plenty of pics for mdf one. Will be making a nice instruction booklet that even jbrown can follow !
Oh by the way I'm still peeling off strips of that glue Joe !!!!
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Old 02-14-2014, 08:25 PM
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Will take plenty of pics for mdf one. Will be making a nice instruction booklet that even jbrown can follow !
Oh by the way I'm still peeling off strips of that glue Joe !!!!


Donny, remember I sent you a question about setting the sub back a little (flush mounting) it. This is what I meant, the wife is pretty set on making sure I can make a grill/cover for the sub. So I set it back like this, how much do you think the specs will change? Can I just make it a semi-cube? 24x24x25 so that the inside dimesions are still the same but the outer box can house the front cover? I think this would also extend the port by an inch, so will that ruin everything?
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Old 02-14-2014, 08:33 PM - Thread Starter
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Quote:
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Quote:
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Will take plenty of pics for mdf one. Will be making a nice instruction booklet that even jbrown can follow !
Oh by the way I'm still peeling off strips of that glue Joe !!!!


Donny, remember I sent you a question about setting the sub back a little (flush mounting) it. This is what I meant, the wife is pretty set on making sure I can make a grill/cover for the sub. So I set it back like this, how much do you think the specs will change? Can I just make it a semi-cube? 24x24x25 so that the inside dimesions are still the same but the outer box can house the front cover? I think this would also extend the port by an inch, so will that ruin everything?

Just make the depth an inch deeper like you said. The total width is 25.5". This change in sizes might lower the tune to 19.8hz. Nothing really , the port a little longer. Go for it and make a nice grill.
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Old 02-14-2014, 08:45 PM
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"Can I just make it a semi-cube? 24x24x25 so that the inside dimesions are still the same but the outer box can house the front cover? I think this would also extend the port by an inch, so will that ruin everything?"

if you keep the outer dimensions the same as the cube, but push the front baffle in as in your picture so that you can make a flush mount grill, all that will happen is that the internal volume will be reduced. that will have the effect of increasing the tune by a bit.

here is a rough idea. no eq applied to either. green line is about the martycube. black line is the marty cube with the front baffle inset by 2.5" to allow for a flush mount grill.



it raises the tuning frequency a hair and decreases low end sensitivity by another 1-2db.

on any of the other marty's it is negligible, but on the martycube, which is already very tight, it actually has a bit of a noticeable difference.

it will still work of course, just a smidgen differently.

Listen. It's All Good.
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Old 02-14-2014, 08:50 PM
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You guys are freaking amazing. I owe you both a beer, or two, or three. If you are every in my neck of the woods and I mean woods, because I am at the base of Mt Raineir the beers are on me. Thank you!!!biggrin.gif
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Old 02-14-2014, 08:53 PM - Thread Starter
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You guys are freaking amazing. I owe you both a beer, or two, or three. If you are every in my neck of the woods and I mean woods, because I am at the base of Mt Raineir the beers are on me. Thank you!!!biggrin.gif
My sister lives in lake forest park so I will be in your neighborhood in the next couple of months. A pizza would be nice :beer:
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Old 02-14-2014, 08:59 PM
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Will take plenty of pics for mdf one. Will be making a nice instruction booklet that even jbrown can follow !
Oh by the way I'm still peeling off strips of that glue Joe !!!!

haha I had to google the best way to remove it!..lol

Sanding it off works great.. smile.gif
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Old 02-14-2014, 09:36 PM
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Cessna 172M, if you allow the grille to stand proud a half inch, you can pick up that much more volume. Alternatively, use a very thin grill to minimize the loss of internal volume.

Mike


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Old 02-14-2014, 09:43 PM
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I like that Mike. Any way to see the entire pic? Is it in your profile?

BTW. It's a very nice 172 been in the family for 25 years. Got my private ticket on it but then moved away and never continued.
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Old 02-14-2014, 09:54 PM
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I used to own a nice T210. Maybe again someday...

Check the original Martysub thread here and Atabea's build thread here.
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Old 02-14-2014, 10:24 PM
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Thanks for the extra pics, the wife is liking it and when the wife is happy.....

Its never too late to get back up there. I learned from a gentleman that was almost 70. He doesn't fly anymore but still hangs around the airport everyday. Has breakfast at the diner and walks around looking and helping out.
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