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Old 7th December 2011, 07:47 PM   #2431
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Quote:
Originally Posted by Kostecki View Post
By "rip grooves" do you mean where the red arrows are pointing, and the "big blog of sealant in the center of the back plate" where the blue arrow is pointing?
That's correct. It's pretty obvious when you have the driver in your hands (as you do in that pic) what is meant. (Although that's a KNS1005A replica you're holding and not a KSN1001A replica/original as I recommend, no sonical difference though only mounting).
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Old 7th December 2011, 07:48 PM   #2432
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Quote:
Originally Posted by Saturnus View Post
That's correct. It's pretty obvious when you have the driver in your hands (as you do in that pic) what is meant. (Although that's a KNS1005A replica you're holding and not a KSN1001A replica/original as I recommend, no sonical difference though only mounting).
Indeed it is, but better to be safe than sorry i guess

Are you absolutely sure about that? It has a Motorola logo both the front and back, and were sold as "Brand new original Motorola piezo bullet tweeters KSN1005A" on eBay.

Edit: Oh.. didn't see the "no sonical difference though only mounting" part - guess it wouldn't matter too much if it's a replica or not though.

Last edited by Kostecki; 7th December 2011 at 07:56 PM.
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Old 7th December 2011, 07:58 PM   #2433
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Quote:
Originally Posted by Kostecki View Post
Are you absolutely sure about that? It has a Motorola logo both the front and back, and were sold as "Brand new original Motorola piezo bullet tweeters KSN1005A" on eBay.
Nope. I should have written replica/original. From the angle your pic is, it's impossible to see if it's either. If it has a Motorola logo on it, it's an original.

If you've compared those with replicas you'll also know why I recommend the originals. The Monacor replicas are decent but the originals are just a lot better.
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Old 7th December 2011, 08:01 PM   #2434
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Quote:
Originally Posted by Kostecki View Post
Edit: Oh.. didn't see the "no sonical difference though only mounting" part - guess it wouldn't matter too much if it's a replica or not though.
There's a big sonical difference between originals and replicas.

There's no sonical difference between the KSN1001A and KSN1005A type, only mounting, as per the datasheet.

http://www.martinsoundpro.com/upload...n1001,1005.pdf
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Old 7th December 2011, 08:02 PM   #2435
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Quote:
Originally Posted by Saturnus View Post
Nope. I should have written replica/original. From the angle your pic is, it's impossible to see if it's either. If it has a Motorola logo on it, it's an original.

If you've compared those with replicas you'll also know why I recommend the originals. The Monacor replicas are decent but the originals are just a lot better.
Phew.. Got me worried about having been scammed there, for a second.

Everything i just great then.
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Old 7th December 2011, 08:58 PM   #2436
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Hey Guys, not sure if this is the proper place to post this, but unsure about where else, but anyways...

Last year our Roskilde camp build our own "sound system", not with the Boominater design, but all the recommended parts. It worked great, but we were not 100% satisfied and we might end up rebuilding the entire thing.

Instead of having the system split in two, with speakers on two sides, we wanted to have them all on one side, so we in some way could control in which direction the volume was loudest. (Since this works best for the way we "live" in our camp).
We did this by building it as a sort of big quad box, in 22mm particleboard (spånplade) which was lacquered 3 times, to avoid it falling apart from moist/rain. Also almost the entire inside lined with two layers of thick carpet, and where we had access to everything through the top.

We know there are multiple problems with this setup, and that it's not ideal, but it was the best we could come up with in the time period we had.

But the main problems were:
1. Vibrations, both from the front panel were the speakers were fitted and the back, along with the top with the lid on.
The lid was simple due to the way it was mounted, and was partly fixed with silicone around the edges. Front and back was just simple the whole piece of wood vibrating.
The problem only occurred at high volumes, so it just seemed that the design could not handle the speakers, or maybe to the nature of the building material, which was not ideal, but chosen because of a limited budget.

2. To high volume (air) inside the cabinet, which we know we can fix by just stuffing things down into it.

Otherwise it worked great, and our camp members loved it.

So... Since we are in good time this year, and have all the electric parts, we were hoping that some of you had a great idea of how to improve our system, or maybe build it in a completely other way, while still having all speakers on one side? (Weight is not a problem).

The electrics are:
AMP6 from 41hz
Goldwood GW-1058
Monacor MPT-005

We used car batteries (which we brought home and still have) since we ran out of money, but we might invest in both proper batteries and solarpanels this year, and some people are talking about different lighting options.

I hope this is not too offtopic, but in advance thanks for your help!
Ps. we are Camp Braveheart btw.

Not 100% sure, but this should be the work drawings from last year:
http://f69.myupload.dk/getfile/93305564d9f
and picture
https://fbcdn-sphotos-a.akamaihd.net..._4607382_n.jpg
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Old 7th December 2011, 09:54 PM   #2437
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Just build a real Boominator

It's carefully designed to avoid all the problems you noted above, and you already have the parts.

EDIT: Also I'm not sure you realize that there's only disadvantages from placing all the drivers on one side. And no advantages. None.

Last edited by Saturnus; 7th December 2011 at 09:58 PM.
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Old 7th December 2011, 10:06 PM   #2438
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@Saturnus, that would be the "easy" solution, but we really want to stick with the "all speakers on one side", so we were really hoping for some creative ideas :-)

But no doubt that the Boominator is great :-)

Otherwise we could just double up and have two boominators in one ;-) But I don't think the other camp members are up for that extra cost :-P
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Old 7th December 2011, 10:35 PM   #2439
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Quote:
Originally Posted by Saturnus View Post
It seems the ideal bubble tweeters will never be available so what's the alternative?

Well, luckily the originally intended original Motorola/CTS KSN1001A piezos are now available again from several places, for example:

CTS / Motorola KSN-1001 Recessed Mount Piezo Electric Super Horn Tweeter</font>
Martin Sound

They're pricey but for Danish/nordic customers actually not much more expensive than the cheap crap they sell at most stores.

If you want them a little cheaper then Monacor has started stocking a KSN1001A replica of very decent quality. Get them from here:

MPT-001
MONACOR MPT-001 - Thomann danske Cyberstore

For both I recommend a 33 or 47 ohm resistor in series. Please make sure it's NOT a power resistor but a solid carbon or metal film resistor of 3W type.
okay.. i think i will go with those from monacor.. dont wanna go overseas.
then i'll find 2 P. Audio 10 inch speakers.. does those piezos from monacor has to have the same restistors as the "original" from motorola? and do ypu know how much better and louder these drivers and piezos will play compared to a JVC boomblaster or Harman Kardon Go?

btw.. can someone help med with the box volume.. it hopefully has to be bout' the same size as this one marine corps theme stereo boombox - YouTube as small as possible..

Sorry for all the Q's but i dont want to mess things up
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Old 8th December 2011, 05:46 AM   #2440
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Quote:
Originally Posted by HifiBoyDenmark View Post
okay.. i think i will go with those from monacor.. dont wanna go overseas.
then i'll find 2 P. Audio 10 inch speakers.. does those piezos from monacor has to have the same restistors as the "original" from motorola? and do ypu know how much better and louder these drivers and piezos will play compared to a JVC boomblaster or Harman Kardon Go?

btw.. can someone help med with the box volume.. it hopefully has to be bout' the same size as this one marine corps theme stereo boombox - YouTube as small as possible..

Sorry for all the Q's but i dont want to mess things up
For comparison of loudness and sound quality then JCV Boomblaster/HK Go = a clock radio, and Boominator = decent home stereo system.

If you're using 2 HP10Ws then you're basically building a half-boominator. Just build one of those instead. The "marine corp theme" one looks to me like it's designed only with looks in mind. The cabinet looks too small to get decent bass and it doesn't appear it's designed to keep cabinet vibrations, and thereby distortion in check. It also appears very flimsy compared to a Boominator which is rock solid. I can't remember if it was in this thread or on another forum where a builder had his Boominator fall of the back of his truck while driving, and when he stopped and picked it up there was only a little scratched paint and a few wood chips that had come of.

I myself had dropped it from shoulder height several times without any damage at all. It's indestructible.
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