What box to build? 2 Mach5 IXL-18 with a Behringer NX6000D - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 1Likes
  • 1 Post By N8DOGG
 
Thread Tools
post #1 of 9 Old 06-28-2020, 11:59 PM - Thread Starter
Member
 
Join Date: Mar 2020
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 0
What box to build? 2 Mach5 IXL-18 with a Behringer NX6000D

Hello,

I got a good deal on 2 Mach5 IXL-18 with a Behringer NX6000D amp and I am keen to build my first DIY sub box (I have moderate wood working ability, and live in Canada, so buying flat packs will not be a great option).

But I am wondering what I should build.

For background info:
Use will be 75% music, 25% HT
Room is ~ 16ft x 10ft
The way the room is laid out, one sub will most likely go right behind the main listening position and one directly in front / center.

Priorities for me would be (in order):
#1 Accuracy and musicality, so I was looking into a sealed box. But then I was playing with WinISD and noted that I may not be able to get as deep as I would like without extreme DSP (which I am ok with) but also extreme cone excursion (which I don't want to blow these subs).

#2 Low extension, the lower the better (although this is my first proper sub, so we shall see how addicting that low end really is), so then I was maybe thinking about a large EBS build. Would a full or mini marty be a good fit?

Thankfully space will not be an issue, so really any box size I would make work.
Also, I typically listen below reference, so will not need them to hit crazy high levels.
I just want it clean and then deep.

Super keen for any recommendations.
Also, since this is my first build, if there are any recommended sites for designs (mostly if ported is the way to go) that would be great!

Sub specs if that helps:
Mach5 IXL-18
T/S Parameters
Fs = 17.7 Hz
Re = 3.4 Ohms
Qes = 0.39
Qms = 5.59
Qts = 0.37
Mms = 434.3 grams
Rms = 8.69 kg/s
Cms = 0.184 mm/N
VAS = 274.1 litres
Sd = 1029.2 cm2
Xmax = 22 mm
Cone Diameter = 36.2 cm
Le = 6.09 mH
Bl = 20.51 Tm
Power Handling: 800 Watts SPL (2.83v/1m): 89.2 db
Ported: 200 litres (7 cu.ft.) 19hz tuning
EBS: 365 litres (12.88 cu.ft.) 15hz tuning

Thanks!
johnp98 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 06-29-2020, 12:20 PM - Thread Starter
Member
 
Join Date: Mar 2020
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 0
Looking into it more, I am wondering if I should:

A) Make a Martycube as it is 4.75 c.f., tuning = 20hz and then I could block the ports to effectively get a sealed 4.75cf sub (Which is super close to the recommended sealed size of 5cf by the manufacturer) - which gives a Qtc of 0.65

B) Make The V.B.S.S. as it would fit nicely in my room, be 6.25cf and tuned to 20hz. I just don't know if it would be a good idea to use this design if I am going from ported to plugging the ports as that would give a Qtc of 0.6
Is that enough of a difference of the Qtc (0.65 vs 0.6) that I should avoid this design compared to the Marty cube if I am thinking of occasionally plugging the ports?

Thoughts?
johnp98 is offline  
post #3 of 9 Old 06-29-2020, 01:07 PM
AVS Forum Special Member
 
N8DOGG's Avatar
 
Join Date: Dec 2003
Location: Canada
Posts: 7,774
Mentioned: 58 Post(s)
Tagged: 1 Thread(s)
Quoted: 1494 Post(s)
Liked: 1755
Marty subs work very well with the IXL. I'd probably build one of them.
Craig S King likes this.

Blasting brown notes for 20 years and counting!
N8DOGG is online now  
Sponsored Links
Advertisement
 
post #4 of 9 Old 06-29-2020, 01:36 PM - Thread Starter
Member
 
Join Date: Mar 2020
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 0
Quote:
Originally Posted by N8DOGG View Post
Marty subs work very well with the IXL. I'd probably build one of them.
Would you think the marty cube would be too small?
As the VBSS is a little larger but not quite the size of the MiniMarty.

Thanks!
johnp98 is offline  
post #5 of 9 Old 06-29-2020, 03:27 PM
Advanced Member
 
spanish68's Avatar
 
Join Date: Jun 2008
Location: S. Florida
Posts: 722
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Liked: 49
I would do two sealed boxes. You have a small room so the room gain in the low frequencies should be very good, you won't have to boost the low end much, if any. Also, since your priority is music and you're not going to push them too much (reference level), two 18" sealed subs should me more than enough for your needs.
spanish68 is offline  
post #6 of 9 Old 06-29-2020, 06:03 PM
AVS Forum Special Member
 
N8DOGG's Avatar
 
Join Date: Dec 2003
Location: Canada
Posts: 7,774
Mentioned: 58 Post(s)
Tagged: 1 Thread(s)
Quoted: 1494 Post(s)
Liked: 1755
Quote:
Originally Posted by johnp98 View Post
Would you think the marty cube would be too small?
As the VBSS is a little larger but not quite the size of the MiniMarty.

Thanks!
I had 2 x IXL's in Marty cubes a few years ago. They performed great.

Blasting brown notes for 20 years and counting!
N8DOGG is online now  
post #7 of 9 Old 06-30-2020, 06:58 AM
AVS Forum Special Member
 
Join Date: Jul 2014
Posts: 5,894
Mentioned: 677 Post(s)
Tagged: 0 Thread(s)
Quoted: 3925 Post(s)
Liked: 16180
Quote:
Originally Posted by johnp98 View Post
Would you think the marty cube would be too small?
As the VBSS is a little larger but not quite the size of the MiniMarty.

Thanks!
The VBSS size box will be significantly better (2.5-3dB around tune) between the additional native output around tune and the bigger box supporting a larger port for the same 20Hz tune you are targeting.

Take the Red Pill (BassEQ) BassEQ Demo Clips TR Curves
Video: Sony 85" X900F @ 80" eyes-to-screen (49.4° viewing angle)
Audio: Denon AVR-X4400H 7.2.4 Atmos
Mains: Fusion-15 LR, Fusion-8 Center, Ported Volt-10 Surrounds, Custom 45°/45° Double-Angled Ported Volt-6 Atmos
Subs: The Two Towers (HT18 32cf 11.5Hz x 2), UM18 4cf x 2, Crowson MAs x 4
aron7awol is offline  
post #8 of 9 Old 06-30-2020, 09:41 AM
AVS Forum Special Member
 
CZ Eddie's Avatar
 
Join Date: Nov 2000
Location: Austin TX, USA
Posts: 7,286
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 132 Post(s)
Liked: 66
OMG how has @NEO Dan 's "Easy Button" enclosure not been suggested here yet?!?
It has to be considered amongst one of the "original" legendary DIY sub threads.
https://www.avsforum.com/forum/155-d...sy-button.html


"The boom is dead, long live the bass"
CZ Eddie is offline  
post #9 of 9 Old 06-30-2020, 08:17 PM - Thread Starter
Member
 
Join Date: Mar 2020
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 0
Ok, I was almost starting to suffer analysis paralysis, so my wife ended up making the decision that the VBSS would be better as it would have more placement options in our room and I could also get the to fit on one sheet of MDF each.

Anyways, we are using a port tune to 20hz yet can port plug to 15hz and to a sealed configuration.

Man I am excited to get these things up and running!

Any suggestions for wiring guides for the NX6000D and subs?
Thanks again for all the input!
johnp98 is offline  
Sponsored Links
Advertisement
 
Reply DIY Speakers and Subs

Tags
build advice , diy , sealed box , subwoofer , subwoofer advice

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


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