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Old 12-26-2013   #51
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Default Re: Review of the Stereo Integrity BM mkIV

Without having looked at the SI site for TS parameters or any graphs...Did you have a target roll off curve with the 0.5cu ft enclosure? I know the JL recommended ones for the 10TW3 include a little hump in response. I'm guessing the BM mkIV has a much flatter response from what I heard. It also has significantly better low end response which I was a little surprised by. In fact, I'd say it compared well in that regard to my 13TW5. The JL has more output, but that BM mkIV is very very clean and sounds fantastic. Job well done Nick.

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Old 12-27-2013   #52
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Default Re: Review of the Stereo Integrity BM mkIV

Quote:
Originally Posted by Electrodynamic View Post

The BM mkIV performs the best in 0.5 ft^3 to 0.6 ft^3 sealed whether you put it in a home, or in a sedan, or in a hatchback, etc. Frequency response, Power handling, excursion at Power and frequency, etc, are all nicely handled in the enclosure size of what we recommend. Power handling becomes the biggest issue if you try to get the woofer to play lower than it already does by increasing box size.
Quote:
Originally Posted by captainobvious View Post
Without having looked at the SI site for TS parameters or any graphs...Did you have a target roll off curve with the 0.5cu ft enclosure? I know the JL recommended ones for the 10TW3 include a little hump in response. I'm guessing the BM mkIV has a much flatter response from what I heard. It also has significantly better low end response which I was a little surprised by. In fact, I'd say it compared well in that regard to my 13TW5. The JL has more output, but that BM mkIV is very very clean and sounds fantastic. Job well done Nick.
Thanks Nick and Steve. I got some information on what Nick has said about it playing flat on the low end. I'll post it later when I get time.


Here are the parameters for the BM mkIV 12" shallow subwoofer:

Re: 6.26
Fs: 19 Hz
Qes: 0.54
Qms: 7.97
Qts: 0.50
Le: 3.97
Sd: 453.7 cm^2
Vas: 71.3 liters
BL: 19.9
Mms: 287.5
Xmax: 14mm
Xsus: 19mm
SPL: 82 dB (1W/1M)

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Old 12-27-2013   #53
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Default Re: Review of the Stereo Integrity BM mkIV

I had a feeling it had a very low FS...didn't expect THAT low though for a shallow mount flat-coned 12". Very nice.

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Old 12-27-2013   #54
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Default Re: Review of the Stereo Integrity BM mkIV

Specs are nice, thanks for sharing.

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Old 01-02-2014   #55
 
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Default Re: Review of the Stereo Integrity BM mkIV

anyone have an ETA on the pre-orders?
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Old 01-03-2014   #56
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Default Re: Review of the Stereo Integrity BM mkIV

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Originally Posted by bertholomey View Post
One of my all time favorite builds! Slade's STI with two of the MKIII BMs.



^^

I could not agree more.

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Old 01-04-2014   #57
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Default Re: Review of the Stereo Integrity BM mkIV

Quote:
Originally Posted by gsxr1300 View Post
anyone have an ETA on the pre-orders?
They will be here around the 27'th of this month. There are a lot of pre-orders so it will take us a little while to get them all tested and shipped out.

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Old 01-05-2014   #58
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Default Re: Review of the Stereo Integrity BM mkIV

What's the regular price? Missed the preorders as well. Haven't owned SI since the claw Mag .. might need to check this one out.
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Old 01-05-2014   #59
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I really wish I'd pre-ordered now. These would be perfect in my STi.

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Old 01-05-2014   #60
 
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Default Re: Review of the Stereo Integrity BM mkIV

Quote:
Originally Posted by OgreDave View Post
What's the regular price? Missed the preorders as well. Haven't owned SI since the claw Mag .. might need to check this one out.
^^^^
This....I am on the fence between the SI and 12TW3.
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Old 01-05-2014   #61
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Default

Both have excellent performance. I preferred the sound of the SI (not just the greater output and the ability to play lower) than the JL 10TW3. As you can see earlier in this thread.....Captainobvious compared the SI favorably to the JL 13TW5. I haven't heard the 12TW3 yet, so I can't comment on that comparison.

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Old 01-05-2014   #62
 
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Default Re: Review of the Stereo Integrity BM mkIV

Anyone know the normal purchase price on these and when ordering may start back up? I'm looking at purchasing 2 slim 12's once I get back from deployment and it looks to be between these or the JL TW3. Right now I am leaning towards the SI because at least I have read reviews on them.
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Old 01-05-2014   #63
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Sweet, where are you deployed?

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Old 01-05-2014   #64
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Default Re: Review of the Stereo Integrity BM mkIV

Quote:
Originally Posted by xXTX_ChallengerXx View Post
Anyone know the normal purchase price on these and when ordering may start back up? I'm looking at purchasing 2 slim 12's once I get back from deployment and it looks to be between these or the JL TW3. Right now I am leaning towards the SI because at least I have read reviews on them.
Regular price will be $389 once they are in stock.

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Default Re: Review of the Stereo Integrity BM mkIV

Quote:
Originally Posted by bertholomey View Post
Sweet, where are you deployed?
I am a submariner in the Navy and will be deploying to the Mediterranean Sea/Arabian Sea area. I've been in the Navy for 10 years now and have been on two different Western Pacific Deployments. This will be my first deployment in this part of the world and I'm pretty excited about it.

Quote:
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Regular price will be $389 once they are in stock.
Thanks!
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Old 01-05-2014   #66
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Quote:
Originally Posted by xXTX_ChallengerXx View Post
I am a submariner in the Navy and will be deploying to the Mediterranean Sea/Arabian Sea area. I've been in the Navy for 10 years now and have been on two different Western Pacific Deployments. This will be my first deployment in this part of the world and I'm pretty excited about it.





Thanks!

That is awesome! Thank You for your service! My wife says 'No Way! Major claustrophobia issues there' 😉

I spent 6 months at Bragg and 1 year in Afghanistan, so I hear ya on getting back and getting things squared away in your car. Have a meaningful and productive deployment!

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Old 01-06-2014   #67
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Default Re: Review of the Stereo Integrity BM mkIV

Quote:
Originally Posted by xXTX_ChallengerXx View Post
Anyone know the normal purchase price on these and when ordering may start back up? I'm looking at purchasing 2 slim 12's once I get back from deployment and it looks to be between these or the JL TW3. Right now I am leaning towards the SI because at least I have read reviews on them.
SI over the TW3 every day all day long. You will not be disappointed with a pair of these. I am fiberglassing every last cubic inch under my back seat to squeeze two of these in just because I am addicted to how clean and full these sound, definitely the best sounding Car subs I have ever heard, slim or not.

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Old 01-06-2014   #68
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Default Re: Review of the Stereo Integrity BM mkIV

Quote:
Originally Posted by captainobvious View Post
I had a feeling it had a very low FS...didn't expect THAT low though for a shallow mount flat-coned 12". Very nice.
19hz IS pretty amazing! I'd love to hear one of these someday. Looking forward to your review Jason. I'm still very happy with the c12
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Old 01-06-2014   #69
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Default Re: Review of the Stereo Integrity BM mkIV

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Originally Posted by Golden Ear View Post
19hz IS pretty amazing! I'd love to hear one of these someday. Looking forward to your review Jason. I'm still very happy with the c12
I'm very glad to hear that - the C12 is a wonderful sub!

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Old 01-07-2014   #70
 
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Default Re: Review of the Stereo Integrity BM mkIV

Just went over the entire review.

OK - the SI is now marked as my next B-Day gift for my self

Though there is over six months until it happens but it falls directly in to my plans!

I am now downloading the Criez D - I liked it a lot

It remindes me of creations by Rob Dougan and as well Juno Reactor (both can be found on the Metrix trilogy OST collections)

Rob Dougan:

[YOUTUBE]Rob Dougan-Clubbed to Death 100% quality - YouTube[/YOUTUBE]

Juno Reactor:

[YOUTUBE]Matrix Soundtrack - Mona Lisa Overdrive [Juno Reactor] - YouTube[/YOUTUBE]


But I would recommend the two CDs (chronicles) by Trentemoeller at most if you liked Criez D

[YOUTUBE]Djuma Soundsystem - Les Djinns (Trentemoller Remix) - YouTube[/YOUTUBE]

Thank you again!

Eddie (hint - I am pretty sure I loaded Trentemoller on the thumb drive )

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Old 01-14-2014   #71
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Default Re: Review of the Stereo Integrity BM mkIV

Can't wait for my BM mkIV!

2013 Focus ST - In Progress! - MyFordTouch - Audison - Phoenix Gold - Scanspeak - Dayton - Stereo Integrity
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Old 01-14-2014   #72
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Can't wait for my BM mkIV!

Marc, I believe you are going to be impressed with the improvements. I'm looking forward to hearing your impressions.

I finally got mine in the right enclosure, so I'll be concentrating on getting this review done in the coming weeks.

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Old 01-14-2014   #73
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Default Re: Review of the Stereo Integrity BM mkIV

Looking forward to getting mine as well
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Old 01-17-2014   #74
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Default Re: Review of the Stereo Integrity BM mkIV

Just saw that Nick announced on Facebook that the subs are due in on the 30th for testing before shipping to customers. Very exciting

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Old 01-21-2014   #75
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Default Re: Review of the Stereo Integrity BM mkIV

Life has gotten in the way, so I haven't been able to update this thread. I finally was able to hook up with Mark to have the sub installed in the proper sized enclosure. Net volume comes out to 0.5 cu ft - extremely strong but light enclosure. From my BRZ Build thread.

This is the box I received the sub in:



I tried to put it in a similarly sized box that Mark had built, but the basket made it impossible without trimming out the opening of the enclosure. I wanted to get it in this box for when I took the sub down to Erin's G2G this past Fall.



Just couldn't get it to seat:



So this is how I was doing a lot of my initial listening......sounded like it had a lot of potential to me. Mark had some criticisms about the sound - because of the box size and because it was just firing up into nothing, but he felt it had potential as well.



This is the first pic that Mark sent me.....with a caption 'Oh My!' This was going to be a challenge to get a 12" subwoofer in a 0.5 cu ft enclosure mounted under the dash that won't take up any more foot space.



Well, this was a hard one to build.....primarily due to the challenges of the recent polar vortex that decided to strike right when I needed to have my subwoofer built.....how dare it! There was some challenges with heating and equipment availability (apparently fiberglass doesn't want to cure at 43F) - Mark was eventually able to overcome these set backs, but it caused some incredibly long, frustrating hours. Here are a couple early pics:



















Lined with Road Kill for GP



Stuffed and wired



This is basically what I saw when I arrived on Saturday.......I was pumped!!!







He asked me to pick it up and carry it over to the other side of the shop to blow it off with the air hose - I nearly threw it to the ceiling - it weighed HALF of what I thought it would weigh. We looked for a scale, but none could be found. We guessed the enclosure + sub was about 25 pounds.....at the most. I think Mark said (please correct me if wrong) he layed up 9 layers of 1.5 ounce mat - the thing is strong!!! From what I remember, it is about half the weight of the JL enclosure - it had a lot more MDF in it's construction.

Of course.....perfect fit. The total increase in distance from the fire wall (or loss of foot space) was less than 3/4" from what the JL enclosure was - I thought that was amazing!





Next step was creating the beauty panel. Again, Mark had a concept in his head that he tried to communicate to me.......I didn't get it. Really cool though to see it put together right in front of me. He joined two pieces of wood....fiberglassed the joint for strength.....added some cleats for strength.......and then covered it to match the interior of the vehicle. He did this in about an hour......very cool.









At one point, he was talking about something, and then he flipped this thing around and I got a look at the front.....I just stopped in mid-sentence





I apparently didn't get a pic of the back side - he covered it with carpet, so that the mdf is not seen.

Dirty test fit



Some finished pics I took yesterday after I cleaned up the car.

















Last one!


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