DO HST-11" enclosure build - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 92Likes
Reply
 
Thread Tools
post #1 of 163 Old 03-07-2015, 10:28 PM - Thread Starter
Advanced Member
 
Electrodynamic's Avatar
 
Join Date: Oct 2009
Posts: 737
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 388 Post(s)
Liked: 580
DO HST-11" enclosure build

I thought about not posting this at all due to the overwhelming negative responses about the HST-11 but I figure why not post it? Most of you can fit larger woofers, multiple larger woofers, build multiples of tens of enclosures to fill up your theater rooms, etc. But some of us do not have that luxury and I am one of those people. I planned on using an HS-24 in the closet with a blow-through into the listening area but my house is simply too small.

After, literally, months of consideration I decided to build an HST-11 and use a pair of them in my 11'x11' theater room with an 8' ceiling. It takes up an extremely small footprint while being able to belt out a respectable frequency response. I employed a local high-end cabinet worker to build the box for the pair of woofers.

Upon initially talking to the cabinet builder I could tell he did not believe anything I was telling him. He is fairly into speakers and having someone come through the door saying they are going to send over 3,000 watts to a pair of 11" speakers sounds absurd. However, after simpy dropping off one of the 11" baskets that are used on the woofers he decided to double up the thickness of the wood. The following pictures are of the beginning of the enclosure build. There will be approximately 0.4" of distance between the pole pieces of the woofers after they are shoved into the tiny sealed box.

I will, of course, take FR measurements of the sytem after it is installed being powered by an iNuke6000DSP. DSP will be turned off for the inital measurements.

...Lord only knows what would happen if I would use some of the "magic sauce" on the HST-11's that I slather on the HS-24's.
Attached Thumbnails
Click image for larger version

Name:	HST-11_Beg.jpg
Views:	779
Size:	95.7 KB
ID:	590426   Click image for larger version

Name:	HST-11_FrontWbasket.jpg
Views:	797
Size:	87.6 KB
ID:	590434   Click image for larger version

Name:	HST-11_Encl_Beg.jpg
Views:	692
Size:	80.7 KB
ID:	590442  
kevings, Mfusick, carp and 3 others like this.

Last edited by Electrodynamic; 03-07-2015 at 10:35 PM.
Electrodynamic is offline  
Sponsored Links
Advertisement
 
post #2 of 163 Old 03-07-2015, 10:56 PM
AVS Forum Special Member
 
Jay1's Avatar
 
Join Date: Aug 2002
Location: West Valley, AZ
Posts: 4,536
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 236 Post(s)
Liked: 220
Nice. DO is a great idea for that driver. In a room your size they'll be killer.

It's not that they're bad they just need a ton of power.

Last edited by Jay1; 03-07-2015 at 10:56 PM.
Jay1 is offline  
post #3 of 163 Old 03-07-2015, 10:57 PM
Bass Enabler
 
Scott Simonian's Avatar
 
Join Date: Oct 2001
Location: Clovis, CA
Posts: 21,208
Mentioned: 160 Post(s)
Tagged: 0 Thread(s)
Quoted: 5389 Post(s)
Liked: 4316
Das what I'm talking about.

Overwhelming negative responses? You crazy, bro!
Electrodynamic and Bombelman like this.
Scott Simonian is online now  
 
post #4 of 163 Old 03-07-2015, 11:55 PM
AVS Forum Special Member
 
chrapladm's Avatar
 
Join Date: Mar 2010
Location: Adelaide, South Australia
Posts: 4,293
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 856 Post(s)
Liked: 294
If it wasnt for shipping I would go with a pair also. Tiny enclosures are a nice thing for me and limited space. Glad to see a build being done.
chrapladm is offline  
post #5 of 163 Old 03-08-2015, 12:19 AM
Member
 
robseyes's Avatar
 
Join Date: Jan 2006
Location: Puyallup,Wa.
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 10
Why the negative response? I think they look awesome! Looking forward to seeing your results & measurements. Sub'do.
robseyes is offline  
post #6 of 163 Old 03-08-2015, 12:25 AM
AVS Forum Special Member
 
michaelddd's Avatar
 
Join Date: Sep 2004
Posts: 1,181
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 322 Post(s)
Liked: 207
That is one solid brick of a box. Small, sealed boxes can absolutely put down the bottom end. You just the right driver, in the right sized box, with enough power. I must admit; 3K watts to a pair of 11's (or 10's or 12's) does sound like a house fire in the making, but that box is obviously built to take it. In your small room you should be quite pleased with the results.
michaelddd is offline  
post #7 of 163 Old 03-08-2015, 07:30 AM
AVS Forum Special Member
 
tuxedocivic's Avatar
 
Join Date: Feb 2010
Location: Ladysmith, BC
Posts: 7,457
Mentioned: 158 Post(s)
Tagged: 1 Thread(s)
Quoted: 1930 Post(s)
Liked: 1754
Looks great. I use 12s sealed and they're great. Of course they can't compete with 18s, nevermind 24s, but it is what it is
tuxedocivic is online now  
post #8 of 163 Old 03-08-2015, 02:33 PM - Thread Starter
Advanced Member
 
Electrodynamic's Avatar
 
Join Date: Oct 2009
Posts: 737
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 388 Post(s)
Liked: 580
Quote:
Originally Posted by Jay1 View Post
Nice. DO is a great idea for that driver. In a room your size they'll be killer.

It's not that they're bad they just need a ton of power.
If they had higher sensitivity they wouldn't play nearly as low. Small trade off in todays market since power is so affordable.
Electrodynamic is offline  
post #9 of 163 Old 03-08-2015, 02:34 PM - Thread Starter
Advanced Member
 
Electrodynamic's Avatar
 
Join Date: Oct 2009
Posts: 737
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 388 Post(s)
Liked: 580
Quote:
Originally Posted by michaelddd View Post
That is one solid brick of a box. Small, sealed boxes can absolutely put down the bottom end. You just the right driver, in the right sized box, with enough power. I must admit; 3K watts to a pair of 11's (or 10's or 12's) does sound like a house fire in the making, but that box is obviously built to take it. In your small room you should be quite pleased with the results.
I know I said 3,000 watts but I'm going to be powering the woofers with an iNuke 6000 DSP. One woofer per channel.
Electrodynamic is offline  
post #10 of 163 Old 03-08-2015, 03:44 PM
AVS Forum Special Member
 
Samps's Avatar
 
Join Date: Feb 2014
Location: Pittsburgh, PA
Posts: 1,936
Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 816 Post(s)
Liked: 442
So 4000 watts! 3000 was leaving too much on the table, lol.
Samps is online now  
post #11 of 163 Old 03-08-2015, 05:57 PM
AVS Forum Special Member
 
dtsdig's Avatar
 
Join Date: Mar 2009
Location: Rochester NY
Posts: 2,434
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 863 Post(s)
Liked: 945
I think it's awesome that you're making your own build thread, Nick! Personally, I think the smaller HST drivers you're offering are kick-ass, it's just that (as you said) there is limited interest from sone in this crowd.
The box looks great so far. Can't wait to see the finished results.
dtsdig is online now  
post #12 of 163 Old 03-08-2015, 08:03 PM - Thread Starter
Advanced Member
 
Electrodynamic's Avatar
 
Join Date: Oct 2009
Posts: 737
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 388 Post(s)
Liked: 580
Quote:
Originally Posted by dtsdig View Post
I think it's awesome that you're making your own build thread, Nick! Personally, I think the smaller HST drivers you're offering are kick-ass, it's just that (as you said) there is limited interest from sone in this crowd.
The box looks great so far. Can't wait to see the finished results.
I really wish my room was bigger, but this is my first house and it's pretty small. But even though it's small I was still able to commandeer one of the extra bedrooms for a "movie" room. Thankfully my wife likes watching TV on big screens so it was an easy sell.

I literally couldn't wait for the enclosure to be build so I temporarily installed a single BM mkIV 12" subwoofer in a shoe-box-sized 0.5 ft^3 enclosure and used one channel of the 6k at 8 Ohms. I was surprised to still be able to get 110 dB at 50 Hz out of the tiny guy! The DSP in the iNuke is surprisingly easy to use and the EQ is the same. Super easily adjustable. Even though I'm not impressed with the amplifier unit itself I am impressed with the DSP and EQ of the amp. Maybe a little later I'll upgrade to a SpeakerPower. I am very impressed with those amps.

But anyway in closing I'm going to order a screen this week. I painted my wall knowing that I was taking a chance/risk in the wall being free of voids but I got hit in the butt upon firing up the screen for the first time. I've got a 1.5 foot wide by 2.5 tall area in the center top of the image that needs patched up. Instead of adding filler, block sanding, and re-painting it I'm going to go with an Elite Screen and put it on the wall. I'll take a few pictures of the room and wall once the screen comes in.

I will, however, take pictures of the dual opposed HST-11 enclosure this week after I pick it up.
coolrda likes this.

Last edited by Electrodynamic; 03-08-2015 at 08:06 PM.
Electrodynamic is offline  
post #13 of 163 Old 03-08-2015, 10:27 PM
Member
 
K9woofer's Avatar
 
Join Date: Feb 2015
Location: MB
Posts: 125
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
Liked: 33
Is that 1" + 3/4" plywood?
K9woofer is offline  
post #14 of 163 Old 03-09-2015, 04:20 AM
AVS Forum Special Member
 
chrapladm's Avatar
 
Join Date: Mar 2010
Location: Adelaide, South Australia
Posts: 4,293
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 856 Post(s)
Liked: 294
Quote:
Originally Posted by Electrodynamic View Post
I know I said 3,000 watts but I'm going to be powering the woofers with an iNuke 6000 DSP. One woofer per channel.
Did you say one channel per VC? J/K
chrapladm is offline  
post #15 of 163 Old 03-09-2015, 09:21 AM
Senior Member
 
Bombelman's Avatar
 
Join Date: Nov 2013
Location: Paramaribo
Posts: 317
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 56 Post(s)
Liked: 52
Quote:
Originally Posted by Scott Simonian View Post
Das what I'm talking about.

Overwhelming negative responses? You crazy, bro!
no negative responses... did you see my build Nick ?
Double walls for SI HST-12 cube build ??
airliner likes this.
Bombelman is offline  
post #16 of 163 Old 03-09-2015, 09:39 AM
d_c
AVS Forum Special Member
 
d_c's Avatar
 
Join Date: Feb 2010
Location: KCMO
Posts: 2,257
Mentioned: 166 Post(s)
Tagged: 0 Thread(s)
Quoted: 861 Post(s)
Liked: 951
This will be a little beastie! That is a pretty small room, so this is a great way to not gobble up space with a big cabinet. Are you having it veneered or painted?

I went to a friend's last night that has some really nice enclosures for his sealed 18s. They looked TINY compared to my sealed enclosure for the 24.
d_c is offline  
post #17 of 163 Old 03-09-2015, 01:17 PM
AVS Forum Special Member
 
Face2's Avatar
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 1,378
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 337 Post(s)
Liked: 203
Wait, you can design and build kick ass drivers but can't build a simple enclosure?
Jay1 likes this.
Face2 is offline  
post #18 of 163 Old 03-09-2015, 01:21 PM
Advanced Member
 
STL D's Avatar
 
Join Date: Feb 2014
Posts: 629
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 277 Post(s)
Liked: 270
Quote:
Originally Posted by Face2 View Post
Wait, you can design and build kick ass drivers but can't build a simple enclosure?
It's below his paygrade.
STL D is offline  
post #19 of 163 Old 03-09-2015, 01:46 PM
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 32,084
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked: 2687
BASS per SPACE... I think you maxed it out bro. Well done.
Mfusick is offline  
post #20 of 163 Old 03-09-2015, 04:09 PM
Senior Member
 
Boomassiv's Avatar
 
Join Date: Feb 2014
Location: Little Rock
Posts: 388
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 118 Post(s)
Liked: 50
Quote:
Originally Posted by STL D View Post
It's below his paygrade.


Kinda like it cost Bill Gates money if he stops to pick up $100 bill laying on ground....Im sure that is like $1000 now or more lol.
Boomassiv is offline  
post #21 of 163 Old 03-09-2015, 10:02 PM - Thread Starter
Advanced Member
 
Electrodynamic's Avatar
 
Join Date: Oct 2009
Posts: 737
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 388 Post(s)
Liked: 580
Quote:
Originally Posted by Face2 View Post
Wait, you can design and build kick ass drivers but can't build a simple enclosure?
It's knowing what you're good at and staying away from what you're not good at. I'm good at designing loudspeakers. I'm not good at woodworking. I'd rather leave something I'm not good at up to people who actually do that for a living. The results are MUCH better.

Semi-build pictures coming as soon as I can link all of the pics.
Electrodynamic is offline  
post #22 of 163 Old 03-09-2015, 10:28 PM - Thread Starter
Advanced Member
 
Electrodynamic's Avatar
 
Join Date: Oct 2009
Posts: 737
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 388 Post(s)
Liked: 580
So I got the eclosure from the cabinet maker today. Very cool guy who is also moderately into speakers. I'm sure we are going to swap out work for product later. I requested the enclosure be finished as natural as possible while being black in color. We used two layer 3/4" arauco plywood. Not only were the panels doubled up but he took the extra mile to vacuum the panels together with wood glue between them for the highest strength. Anyway, I absolutely love the way the enclosure turned out. Is it 1000% perfect? No, but I like it that way. You can see that it was made by a person and the quality shows. Being an old-school wood worker most of the seams are dado joints (the inside brace between the drivers motors), etc.

So, on with the build:

First time lugging the enclosure up the stairs to the media room:




And then I began the extremely tedious task of installing the woofers. I do not like a non-treated enclosure and I have found through testing that with extremely small internal volumes that loose fiberglass insulation works the best to smooth out the FR while adding a touch of output on the bottom end. By small enclosures I am talking about these drivers. After the drivers displacement is accounted for there is about 0.4 ft^3 per woofer. Very small.



I managed to get the first woofer installed after finding out that zip ties were not going to work as the two zip ties I used to install the first woofer snapped and left the zip ties under the frame so the woofer rocked back and forth. I had to tip the enclosure over, remove the zip ties, and then use a rather unorthox method to mount the woofer. I used the smallest allen bit I had and placed it through the mouting hole of the driver and then mated it up with an openn screw hole. It was my only chance of aligning the pre-drilled holes with the screw holes of the frame. Thankfully it worked out pretty good.


Here is a look at how we used the PE dual screw terminals in the double 3/4" enclosure walls:


Picture of the twin HST-11's on the floor:


Despite the pedigre of what most people post on this forum here is my before EQ and after EQ responses late at night. Keep in mind I took these measurements with my 2.5 year old son asleep in the next room.

How close the motors are to each other:


Absolutely zero EQ and low volume:


After first EQ adjustment:


Oops, I forgot I could lower the FR of the Omimic:
wlelandj, ambesolman and Boomassiv like this.

Last edited by Electrodynamic; 03-09-2015 at 11:08 PM.
Electrodynamic is offline  
post #23 of 163 Old 03-09-2015, 11:17 PM
Bass Enabler
 
Scott Simonian's Avatar
 
Join Date: Oct 2001
Location: Clovis, CA
Posts: 21,208
Mentioned: 160 Post(s)
Tagged: 0 Thread(s)
Quoted: 5389 Post(s)
Liked: 4316
Scott Simonian is online now  
post #24 of 163 Old 03-09-2015, 11:19 PM - Thread Starter
Advanced Member
 
Electrodynamic's Avatar
 
Join Date: Oct 2009
Posts: 737
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 388 Post(s)
Liked: 580
FWIW even during the ultra-low level I've been listening to recently (it's currently 2:15 AM) the low end is so much better than the single BM mkIV subwoofer in 0.5 ft^3 sealed. It should be. But the cool thing is the footprint is still very very small. I'll open up this pair of HST-11's this weekend and report back with measurements.

...but I'm sure my mic won't be calibrated correctly, nor be in the correct position, etc. Regardless I will post data without "magic sauce".
Electrodynamic is offline  
post #25 of 163 Old 03-09-2015, 11:44 PM
AVS Forum Special Member
 
wormraper's Avatar
 
Join Date: Jun 2006
Location: Tucson Arizona
Posts: 5,019
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 317 Post(s)
Liked: 162
those drivers look siiiiiiiiiiiiiiiiiick
wormraper is online now  
post #26 of 163 Old 03-10-2015, 06:30 AM
AVS Forum Special Member
 
dtsdig's Avatar
 
Join Date: Mar 2009
Location: Rochester NY
Posts: 2,434
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 863 Post(s)
Liked: 945
I love the look of those monstrous "little" guys! If I had the spare cash, I'd build a super small dual opposed like you did to use nearfield.
dtsdig is online now  
post #27 of 163 Old 03-10-2015, 07:09 AM
Advanced Member
 
randyc1's Avatar
 
Join Date: Dec 2009
Location: Montreal
Posts: 942
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 241 Post(s)
Liked: 40
What are the outer dimensions of the enclosure ?
randyc1 is offline  
post #28 of 163 Old 03-10-2015, 07:39 AM
Advanced Member
 
MemX's Avatar
 
Join Date: Oct 2012
Posts: 753
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked: 64
Love this

Would you be able to extend the graphs down below 20Hz? Would be cool to see how low they go
MemX is offline  
post #29 of 163 Old 03-10-2015, 08:40 AM
AVS Forum Special Member
 
JohnDean's Avatar
 
Join Date: Jul 2012
Location: Franklin, TN
Posts: 1,178
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 443 Post(s)
Liked: 187
Did I miss the completed pic with both drivers installed? I heard measurements then my ADD kicked in....

I am slightly amused that the guy that builds 24" drivers only uses 11s in his house. I think that's par for the course though. My Engine/Trans builder drives a jalopy.
Bombelman likes this.
JohnDean is offline  
post #30 of 163 Old 03-10-2015, 09:05 AM
AVS Forum Special Member
 
chrapladm's Avatar
 
Join Date: Mar 2010
Location: Adelaide, South Australia
Posts: 4,293
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 856 Post(s)
Liked: 294
Quote:
Originally Posted by JohnDean View Post
Did I miss the completed pic with both drivers installed? I heard measurements then my ADD kicked in....

I am slightly amused that the guy that builds 24" drivers only uses 11s in his house. I think that's par for the course though. My Engine/Trans builder drives a jalopy.
Well you might have missed this is going in a 11' x 11' room. So I think smaller subs are better for less footprint. And why not stick with the 11 theme.
chrapladm is offline  
Sponsored Links
Advertisement
 
Reply DIY Speakers and Subs



Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off