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Stereo Integrity HST-18 "MACHTSUB" BUILD - Page 4

post #91 of 400
Quote:
I also selected my drivers but its a secret...

Uhhh! tongue.gif
post #92 of 400
Thread Starter 
Steve, I know I know I'm a horrible person! I'll put it this way, I don't know of anyone who owns the drivers here on the forum.
post #93 of 400
Quote:
Originally Posted by thebuckaman View Post

Steve, I know I know I'm a horrible person! I'll put it this way, I don't know of anyone who owns the drivers here on the forum.

Now that’s super cool! I can’t wait to load’em up and take a look! I can only hope there's no good reason it hasn’t happened over here though. wink.gif
post #94 of 400
I can tell you one thing for sure..... there is NO good reason why it hasn't happened over here. OR anywhere for that matter.

Thebuck got what I consider to be the best option not available to mankind biggrin.gif
post #95 of 400
Uh oh! good old pd.. smile.gif Ok you guys got my attention, now I'm really looking forward to this.
post #96 of 400
I believe the mystery drivers are gonna be the HST from stereo integrity.
post #97 of 400
^^ mmm.. That makes sense.
post #98 of 400
post #99 of 400

Wow! That Radian woofer looks like a beast! You don't see many pro-style woofers with over 21" Xmax! Too bad they cost so much! For the price of one of these you could almost get two AE TD15's, or a single TD18 with money left over. I am not sure how this Radian 2218NEO compares to the TD18. I know it has more excursion and more efficiency, but beyond that, I have no idea.
post #100 of 400
Thread Starter 

Whoa.....that is a serious pro audio driver! 21mm xmax, 28 hz FS, and 4 inch coil. I like it...alot. I have access to radian products too......hmmmmmm rolleyes.gif
post #101 of 400
Quote:
Originally Posted by thebuckaman View Post

Whoa.....that is a serious pro audio driver! 21mm xmax, 28 hz FS, and 4 inch coil. I like it...alot. I have access to radian products too......hmmmmmm rolleyes.gif

Google is your friend wink.gif
post #102 of 400
Thread Starter 
Quote:
Originally Posted by steve nn View Post

Google is your friend wink.gif

Or my enemy! I already bought my drivers! Hahaha. No buyers remorse though smile.gif

I also looked at these at one point, but even as a jbl dealer I couldn't get just the drivers. I had to give the serial number of the vertec box I was replacing them from!

http://www.jblpro.com/press/VT4880_06/VT4880_06.htm
post #103 of 400
Quote:
Originally Posted by thebuckaman View Post

Or my enemy! I already bought my drivers! Hahaha. No buyers remorse though smile.gif

I also looked at these at one point, but even as a jbl dealer I couldn't get just the drivers. I had to give the serial number of the vertec box I was replacing them from!

http://www.jblpro.com/press/VT4880_06/VT4880_06.htm

Interesting! I was up at Mount St. Helens awhile back and viewed a movie in their theater. The theater was pretty good size 300-500 seating's off the top of my head. After a couple of movies the show was over and I went up front to check the view out and the two subs they had loaded to the left and right. I don’t know what they are called, but they were JBL’s. I walked away thinking that for their intended use they were pretty incredible subs to put out that much bass in such a large room with no gain. I did take a pic, but the theater was fairly dark. I’m sure I’ve seen them before when looking at their products. Anyway that’s quite the driver!
post #104 of 400
Thread Starter 
http://jblpro.com/www/products/installed-sound/ae-series/asb7128#.UvJjH2JdWuI

I was able to hear a demo of 8 of these (each with an Itech 12000!) paired with Vertec Line arrays in 5.1 at a Harman demo near Chicago. They let us play whatever we wanted from our phones or cd. I chose the THX butterflies demo. It was a smallish room and it was painful! They had the grill off on one and the excursion looked comical for a accordion surround. It was really moving when the mushroom part of the THX demo hit! JBL guys were even a bit wide eyed!!
Edited by thebuckaman - 2/5/14 at 10:38am
post #105 of 400
Ooooooohhhh yeah. smile.gif
post #106 of 400
Quote:
Originally Posted by thebuckaman View Post

http://jblpro.com/www/products/installed-sound/ae-series/asb7128#.UvJjH2JdWuI

I was able to hear a demo of 8 of these (each with an Itech 12000!) paired with Vertec Line arrays in 5.1 at a Harman demo near Chicago. They let us play whatever we wanted from our phones or cd. I chose the THX butterflies demo. It was a smallish room and it was painful! They had the grill off on one and the excursion looked comical for a accordion surround. It was really moving when the mushroom part of the THX demo hit! JBL guys were even a bit wide eyed!!

Cool! cool.gif

I would have loved to see their faces on that one. biggrin.gif
post #107 of 400
Thread Starter 
Quote:
Originally Posted by jpmst3 View Post

Cool! cool.gif

I would have loved to see their faces on that one. biggrin.gif

No high pass filter caused some serious unloading on the woofers! I really wish I knew I could play my own content. I would have brought my scubasteve demo disc!
post #108 of 400
I bet they wouldn't like it if you broke their drivers.... wink.gif
post #109 of 400
Thread Starter 
I recommended a 20 hz high pass. They kind of stared at me and said "it doesn't need one." eek.gif

Mmmmmkay...here we go. cool.gif
post #110 of 400
Quote:
Originally Posted by thebuckaman View Post

Whoa.....that is a serious pro audio driver! 21mm xmax, 28 hz FS, and 4 inch coil. I like it...alot. I have access to radian products too......hmmmmmm rolleyes.gif

Except it isn't 21mm one way. Only 10.5 actually
post #111 of 400
Quote:
Originally Posted by thebuckaman View Post

Steve, I know I know I'm a horrible person! I'll put it this way, I don't know of anyone who owns the drivers here on the forum.

I don't want to be "that guy", but I believe if you read the forum rules it reads that you're not allowed to leave fellow forum members a.k.a. FRIENDS in the dark as to mystery drivers going to be used as it is unfair and mean. I would hate to get an administrator involved wink.gif

Dan
post #112 of 400
Thread Starter 
Quote:
Originally Posted by saabracer23 View Post

I don't want to be "that guy", but I believe if you read the forum rules it reads that you're not allowed to leave fellow forum members a.k.a. FRIENDS in the dark as to mystery drivers going to be used as it is unfair and mean. I would hate to get an administrator involved wink.gif

Dan

that made me spit coffee all over my car this morning.
post #113 of 400
Quote:
Originally Posted by thebuckaman View Post

that made me spit coffee all over my car this morning.

I told you Google was your friend. I just wasn't going to be the one that told you.
post #114 of 400
Hey guys...I saw there were some questions about the measurements at DB. The Know How section lays out a brief overview of the equipment used and each measurement and how to interpret the results. We migrated the site to a new server a whole back and apparently the notes in this section reverted back to the original ones which were not as complete. They are updated now. There are some typos in there still but hopefully that will get fixed soon.

Long story short...ANY measurement that indicates an SPL is taken or referenced to 2 meters. Unless otherwise indicated. If it is not it will be noted on the chart labelling for that measurement. For example all sensitivity measurements are measured at 1meter at a fixed drive voltage noted and also at 10 meters with 10x the voltage. This is listed in the measurements. This is only performed for passive systems. The drive voltage is also listed for all other measurements when it was recorded. Again for only passive systems. The long term output compression sweeps are the key for the voltages. Nearly all of the other measurements are taken at the same drive voltages as one of those sweeps so a look at the long term output graph will list the voltage if it is not listed directly in say the distortion graph due to limits on characters directly in the graph. Cea-2010 also lists the drive voltages on the chart under static graphs. For some older systems the voltage was not recorded. CEA-2010 burst testing results are referenced to 2 meters also and is not a peak waveform calculation but rms from the waveform. I hope that clears some things up. If you can't find the drive voltage or distance or have other questions about a measurement let me know.

Forgive the punctuation and grammar I'm posting from the phone.
post #115 of 400
Thread Starter 


double front baffle completed with passed through router ports. notice the driver mock up? =)
post #116 of 400
Quote:
Originally Posted by thebuckaman View Post



double front baffle completed with passed through router ports. notice the driver mock up? =)

mmm smile.gif

Quote:
Ricci Hey guys...I saw there were some questions about the measurements at DB. The Know How section lays out a brief overview of the equipment used and each measurement and how to interpret the results. We migrated the site to a new server a whole back and apparently the notes in this section reverted back to the original ones which were not as complete. They are updated now. There are some typos in there still but hopefully that will get fixed soon.

Long story short...ANY measurement that indicates an SPL is taken or referenced to 2 meters. Unless otherwise indicated. If it is not it will be noted on the chart labelling for that measurement. For example all sensitivity measurements are measured at 1meter at a fixed drive voltage noted and also at 10 meters with 10x the voltage. This is listed in the measurements. This is only performed for passive systems. The drive voltage is also listed for all other measurements when it was recorded. Again for only passive systems. The long term output compression sweeps are the key for the voltages. Nearly all of the other measurements are taken at the same drive voltages as one of those sweeps so a look at the long term output graph will list the voltage if it is not listed directly in say the distortion graph due to limits on characters directly in the graph. Cea-2010 also lists the drive voltages on the chart under static graphs. For some older systems the voltage was not recorded. CEA-2010 burst testing results are referenced to 2 meters also and is not a peak waveform calculation but rms from the waveform. I hope that clears some things up. If you can't find the drive voltage or distance or have other questions about a measurement let me know.

Forgive the punctuation and grammar I'm posting from the phone.

Thank you for taking the time Josh cool.gif
Edited by steve nn - 2/7/14 at 9:07am
post #117 of 400
Thread Starter 


Bracing with dowel rods. Based on Bill Fitzmaurice's method
post #118 of 400
Looks good!
post #119 of 400
Thread Starter 
Quote:
Originally Posted by notnyt View Post

Looks good!

Thanks Not! I am getting really anxious to see how this is going perform. I really appreciate everyone's input and help on this project. I learned a lot on this project and this was my first from scratch design, so the process was a lot of fun. Box #1 is close to completion. Duratex is held up due to weather, so that will slow down completion a little. Box seems to be extremely solid.

On a side note, my Peavey IPR7500DSP will be here today, but I am also really looking into the Speakerpower SP2-8000. The more I read on these amps, the more I like them.
post #120 of 400
Quote:
Originally Posted by thebuckaman View Post



Bracing with dowel rods. Based on Bill Fitzmaurice's method

Really starting to shape up there buck. cool.gif
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