QSC SC 2150 OEM LCR Build - Page 3 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 89Likes
Reply
 
Thread Tools
post #61 of 133 Old 09-24-2018, 07:10 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Here is the progress I got done yesterday, all three boxes and 2 front baffles, the third one and all the ports will be done today. Because I went with flares ports they are 3” wider so there is not much room between the 15” woofer and port, hopefully it will look ok.



Sent from my iPhone using Tapatalk
eng-399 and Jk7.2 like this.
Mahuzz13 is offline  
Sponsored Links
Advertisement
 
post #62 of 133 Old 09-24-2018, 07:28 AM
AVS Forum Special Member
 
hd0823's Avatar
 
Join Date: Oct 2015
Posts: 2,199
Mentioned: 141 Post(s)
Tagged: 0 Thread(s)
Quoted: 848 Post(s)
Liked: 1588
Quote:
Originally Posted by Mahuzz13 View Post
Here is the progress I got done yesterday, all three boxes and 2 front baffles, the third one and all the ports will be done today. Because I went with flares ports they are 3” wider so there is not much room between the 15” woofer and port, hopefully it will look ok.



Sent from my iPhone using Tapatalk
Looking great man cant wait till you get these done

Sent from my SM-N950U using Tapatalk
Jk7.2 likes this.
hd0823 is offline  
post #63 of 133 Old 09-24-2018, 08:14 AM
AVS Forum Special Member
 
Jk7.2's Avatar
 
Join Date: Apr 2015
Location: Detroit area
Posts: 3,080
Mentioned: 90 Post(s)
Tagged: 0 Thread(s)
Quoted: 1525 Post(s)
Liked: 2740
Quote:
Originally Posted by Mahuzz13 View Post
Here is the progress I got done yesterday, all three boxes and 2 front baffles, the third one and all the ports will be done today. Because I went with flares ports they are 3” wider so there is not much room between the 15” woofer and port, hopefully it will look ok.



Sent from my iPhone using Tapatalk


How ya gonna brace those bad boys? You don’t want any resonance in the panels. And are you lining them with denim insulation?
Jk7.2 is online now  
Sponsored Links
Advertisement
 
post #64 of 133 Old 09-24-2018, 09:02 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
As per bracing I spoke to Mike and still a little unsure where I should put them. He said up the side walls and where the drivers will be, just using stick bracing. As per insulation I was going with mattress topper, any benefits to using denim?


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #65 of 133 Old 09-24-2018, 02:48 PM
AVS Forum Special Member
 
eng-399's Avatar
 
Join Date: Sep 2013
Location: Plainfield IL.
Posts: 5,536
Mentioned: 552 Post(s)
Tagged: 0 Thread(s)
Quoted: 2429 Post(s)
Liked: 5019
I would run a brace down both side walls and top and bottom if window braces can’t be used. Your going to want to kill any resonance in that box. Knock on the box and see where it sounds hollow. Running a brace like I’m saying above should help strengthen it up. You can add even more to if need be. Thats were I would start though.
Jk7.2 and Mahuzz13 like this.
eng-399 is offline  
post #66 of 133 Old 09-24-2018, 06:39 PM
AVS Forum Special Member
 
corradizo's Avatar
 
Join Date: Aug 2009
Location: near Chicago
Posts: 3,452
Mentioned: 82 Post(s)
Tagged: 0 Thread(s)
Quoted: 1537 Post(s)
Liked: 1599
What is in the oem models? I would definitely go with the denim. The topper won't absorb enough, imo
corradizo is online now  
post #67 of 133 Old 09-24-2018, 06:42 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Quote:
Originally Posted by corradizo View Post
What is in the oem models? I would definitely go with the denim. The topper won't absorb enough, imo


No one seems to know that answer and for some reason Jeremy won’t take his apart lol to find out for me.
(Seriously Jeremy don’t do it)

I’m going to pick up some tomorrow night


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #68 of 133 Old 09-24-2018, 06:44 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Here is what I have finished so far and I have cut the bracing for all the boxes.

Front baffle is just dry fit so I can put all the braces in first, well I think that’s the way to do it


Sent from my iPhone using Tapatalk
johnson636 likes this.
Mahuzz13 is offline  
post #69 of 133 Old 09-24-2018, 06:46 PM
AVS Forum Special Member
 
corradizo's Avatar
 
Join Date: Aug 2009
Location: near Chicago
Posts: 3,452
Mentioned: 82 Post(s)
Tagged: 0 Thread(s)
Quoted: 1537 Post(s)
Liked: 1599
Download a copy of boxnotes and enter in the dimensions of one chamber. That will tell you what frequencies you may need to absorb. Then based on Bob gold's coefficients site you can pick the right thickness denim or whatever material you plan to use.

http://www.subwoofer-builder.com/freesoft.htm

https://www.bobgolds.com/AbsorptionCoefficients.htm
corradizo is online now  
post #70 of 133 Old 09-25-2018, 03:37 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Quote:
Originally Posted by corradizo View Post
Download a copy of boxnotes and enter in the dimensions of one chamber. That will tell you what frequencies you may need to absorb. Then based on Bob gold's coefficients site you can pick the right thickness denim or whatever material you plan to use.

http://www.subwoofer-builder.com/freesoft.htm

https://www.bobgolds.com/AbsorptionCoefficients.htm


Thanks I will definitely check this out


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #71 of 133 Old 09-25-2018, 05:07 AM
AVS Forum Special Member
 
Samps's Avatar
 
Join Date: Feb 2014
Location: Pittsburgh, PA
Posts: 2,740
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 1225 Post(s)
Liked: 904
The ports are big enough to look inside. Flashlight and maybe one of those telescoping mirrors. If you really wanted to know what the oem setup is.
Mahuzz13 likes this.
Samps is offline  
post #72 of 133 Old 10-01-2018, 06:30 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
QSC SC 2150 OEM LCR Build

Quick little update, I went with mattress topper that I have 1”1/4 thick, denim is not easy to get here and most of it is to thick so I opted for this after speaking to @rlhaudio which was one of the original QSC clone builders. He said the QSC only puts in 1/2” duct board and he said he noticed a big difference between mattress topper and polyfil. I would also like to that him for giving me the crossover schematics, without those I would of bypassed the passive/bi-amp switch.
I have one box almost ready to test, just waiting for my soldering iron which I have never done before so should be fun. After I hook up the XO I’ll test it out then finish the other two if everything works as planned.
Some stick bracing where the weakest points are around the woofer.
Port is a precision flared port instead of just a straight pvc or abs tube, I was told these will perform better, I have nothing to compare it to so I am guess it’s true lol.


Sent from my iPhone using Tapatalk

Last edited by Mahuzz13; 10-01-2018 at 06:50 PM.
Mahuzz13 is offline  
post #73 of 133 Old 10-01-2018, 07:29 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Here is the crossover schematics if anyone ever needs it



Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #74 of 133 Old 10-01-2018, 08:02 PM
AVS Forum Special Member
 
hd0823's Avatar
 
Join Date: Oct 2015
Posts: 2,199
Mentioned: 141 Post(s)
Tagged: 0 Thread(s)
Quoted: 848 Post(s)
Liked: 1588
Quote:
Originally Posted by Mahuzz13 View Post
Here is the crossover schematics if anyone ever needs it



Sent from my iPhone using Tapatalk
Thanks it's nice to have these in hand just incase

Sent from my SM-N950U using Tapatalk
Mahuzz13 likes this.
hd0823 is offline  
post #75 of 133 Old 10-05-2018, 04:42 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Got all the boxes all braced and lined, the first one always takes the longest the next two I flew through.
So soldering I hear it’s really easy well let me tell you I suck at it for sure but I got my first crossover soldered to the passive bi-amp switch. So I decided to try one speaker out and yes I use the little Lepai 20w amp and all I can say it WOW!!!! I’ve never heard a speaker so crystal clear before at such low volume levels. Can’t wait to hook this up to my Emotiva XPA-11 with 300w going into them
I also realized I do not have any of the hardware (bolts) to hook the mids and tweeter to the waveguide. I will try contacting QSC to see if I can get them from them.


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #76 of 133 Old 10-05-2018, 04:45 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Next up it to get the other 2 XOs done and get them paint ready, should have them done this weekend.


Sent from my iPhone using Tapatalk
Jk7.2 likes this.
Mahuzz13 is offline  
post #77 of 133 Old 10-07-2018, 12:19 AM
Advanced Member
 
rlhaudio's Avatar
 
Join Date: Jun 2010
Location: Michigan
Posts: 951
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 338 Post(s)
Liked: 113
Quote:
Originally Posted by Mahuzz13 View Post
Got all the boxes all braced and lined, the first one always takes the longest the next two I flew through.
So soldering I hear it’s really easy well let me tell you I suck at it for sure but I got my first crossover soldered to the passive bi-amp switch. So I decided to try one speaker out and yes I use the little Lepai 20w amp and all I can say it WOW!!!! I’ve never heard a speaker so crystal clear before at such low volume levels. Can’t wait to hook this up to my Emotiva XPA-11 with 300w going into them
I also realized I do not have any of the hardware (bolts) to hook the mids and tweeter to the waveguide. I will try contacting QSC to see if I can get them from them.


Sent from my iPhone using Tapatalk
Here are the part numbers you need including mounting screws.

WP-002157-00 Terminal Plate (SC-2150) 7 $55.40 $387.80
SP-000084-GP 15" Woofer (SC-2150) 6 $109.50 $657.00
CH-000574-GP HF/MF Mounting Plate (HPR-153i) 6 $1.45 $8.70
CH-000865-00 Left Horn Bracket 3 $8.65 $25.95 If your building 3 identical speakers buy 3 left horn plates. They will mount vertically to the WG
CH-000866-00 Right Horn Bracket 3 $8.65 $25.95 If your building 3 identical speakers buy 3 right horn plates. They will mount vertically to the WG
CH-000865-00 Horn Bracket Base 3 $15.55 $46.65 Buy 3 Horn bracket bases. they mount horizonal allowing you to rotate the
waveguide at different toed in or toed out angles
Also allows angle up or down .5 .10 .15, etc degrees each waveguide.
Allows for proper speaker setup in your room. Alot easier and more precise than building
out of wood.

PL-000066-GP Mid Driver Gasket 7 $1.45 $10.15 mid gasket if you need it
SC-000088-GP Mid Driver Screws 12 $1.45 $17.40 matching screws to mount mid driver
SC-000094-GP Compression Driver Screws 14 $1.45 $20.30 matching screws to mount compression driver.

Any Questions Link to right horn bracket https://parts.qsc.com/search?q=CH-000866-00 3 total for 3 speakers
***********Link to left horn bracket. https://parts.qsc.com/search?q=CH-000865-00 3 total for 3 speakers.
************Link to horn bracket base https://parts.qsc.com/search?q=CH-000865-00 1 for each speaker

Any questions, feel free to ask.
Jk7.2 and Mahuzz13 like this.

Marantz 7702mk2, Panasonic 8000 w/ 130" AT Screen HTPC w/60 tb
DIY QSC SC-2150 L,C,R (10) QSC SR-8101 sides, rears & atmos/dst-x
DIY (4) Fusion Tempest, 88 Special
DIY (6) JBL cx12" UM-15", SI-18" subs, BFM Tuba HT, Dayton MKIII 15", (2) PA460 mbm
rlhaudio is offline  
post #78 of 133 Old 10-07-2018, 03:25 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Thanks Bob I really appreciate you sending me this.


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #79 of 133 Old 10-07-2018, 05:09 PM
AVS Forum Special Member
 
Jk7.2's Avatar
 
Join Date: Apr 2015
Location: Detroit area
Posts: 3,080
Mentioned: 90 Post(s)
Tagged: 0 Thread(s)
Quoted: 1525 Post(s)
Liked: 2740
Quote:
Originally Posted by Mahuzz13 View Post
Next up it to get the other 2 XOs done and get them paint ready, should have them done this weekend.


Sent from my iPhone using Tapatalk


I can’t wait to see your finish product
Jk7.2 is online now  
post #80 of 133 Old 10-09-2018, 05:52 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
QSC SC 2150 OEM LCR Build

Quick update, all 3 are primed.


Black should be going on tonight before I go to bed if there is not to many touch ups I have to make



Sent from my iPhone using Tapatalk

Last edited by Mahuzz13; 10-09-2018 at 05:57 PM.
Mahuzz13 is offline  
post #81 of 133 Old 10-11-2018, 03:02 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Do I have to put a seal/gasket around each driver? If so what do I use?


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #82 of 133 Old 10-11-2018, 03:50 PM
AVS Forum Special Member
 
corradizo's Avatar
 
Join Date: Aug 2009
Location: near Chicago
Posts: 3,452
Mentioned: 82 Post(s)
Tagged: 0 Thread(s)
Quoted: 1537 Post(s)
Liked: 1599
Quote:
Originally Posted by Mahuzz13 View Post
Do I have to put a seal/gasket around each driver? If so what do I use?


Sent from my iPhone using Tapatalk


Yes, closed cell foam weather stripping is my go to.

https://m.lowes.com/pd/M-D-17-ft-Gra...QaAmS_EALw_wcB
corradizo is online now  
post #83 of 133 Old 10-11-2018, 04:02 PM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Quote:
Originally Posted by corradizo View Post
Yes, closed cell foam weather stripping is my go to.

https://m.lowes.com/pd/M-D-17-ft-Gra...QaAmS_EALw_wcB


Perfect thanks


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #84 of 133 Old 10-13-2018, 09:17 AM
AVS Forum Special Member
 
Jk7.2's Avatar
 
Join Date: Apr 2015
Location: Detroit area
Posts: 3,080
Mentioned: 90 Post(s)
Tagged: 0 Thread(s)
Quoted: 1525 Post(s)
Liked: 2740
Quote:
Originally Posted by Mahuzz13 View Post
Perfect thanks


Sent from my iPhone using Tapatalk


You’ve gotta have a couple good pics by now of these bad boys!
Jk7.2 is online now  
post #85 of 133 Old 10-13-2018, 09:21 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Quote:
Originally Posted by Jk7.2 View Post
You’ve gotta have a couple good pics by now of these bad boys!


I do and I was going to post when I have them all completed which was going to be today but I am have trouble with one, no sound at all from the woofers


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #86 of 133 Old 10-13-2018, 09:33 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709

I just assumed if one crossover worked they all would. I should of done this first before installing everything 🤬
Have to take one all apart now to see what’s going on.


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #87 of 133 Old 10-13-2018, 09:39 AM
AVS Forum Special Member
 
Jk7.2's Avatar
 
Join Date: Apr 2015
Location: Detroit area
Posts: 3,080
Mentioned: 90 Post(s)
Tagged: 0 Thread(s)
Quoted: 1525 Post(s)
Liked: 2740
Quote:
Originally Posted by Mahuzz13 View Post

I just assumed if one crossover worked they all would. I should of done this first before installing everything 🤬
Have to take one all apart now to see what’s going on.


Sent from my iPhone using Tapatalk


It happens. Take your time. They will be incredible once it’s all shook out.
VicTorious1 and Mahuzz13 like this.
Jk7.2 is online now  
post #88 of 133 Old 10-13-2018, 09:48 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Quote:
Originally Posted by Jk7.2 View Post
It happens. Take your time. They will be incredible once it’s all shook out.


I needed that someone to talk me off the ledge lol.
As soon as I get it up and running I will post pics.


Sent from my iPhone using Tapatalk
Jk7.2 likes this.
Mahuzz13 is offline  
post #89 of 133 Old 10-14-2018, 08:48 AM - Thread Starter
Advanced Member
 
Mahuzz13's Avatar
 
Join Date: Feb 2017
Location: Ontario, Canada
Posts: 804
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 389 Post(s)
Liked: 709
Ok so crisis averted, all it was a lose crimped connectionwhere the wires go up to the toggle switch, the wire wasn’t touching the connector nor the spot where it goes onto the toggle switch. After speaking to @Eng 399 Mike last night on the phone he walked me through some steps I should go through before I think about sending the crossovers to someone to look at them. Now that would of been a pain in the rear.

I’m going to post some pictures of some challenges I went through not knowing and not have a manual so I hope this may help someone else that may build these.


It doesn’t have to this brand but you will need at least 3 rolls at 17’ to do all the ports and woofers
Unwind enough and pull the backing off makes it way easier to use and rap around the woofer and port

This is a must test you each speaker to make sure everything works before screwing everything in place

If you install the bracket that hold the waveguide like this it will be recessed which looks wrong as I found out later do it like this....
I also put drywall screws and washers on the two outside degree angle spots to secure the waveguide from shaking, don’t over tighten, just enough to stop the movement but still allowing them to turn.

When wiring the Neutrik keep one wire shorter if you don’t have different colour wire so you know that the shorter one goes to the MF and the longer one goes to the HF

I put the rubber feet on as well that came with

This at a full angle 15 degrees which is way to much but just to show you how much you have to play with.

Ok so here they are....




Now I have to hook them all up to see how they sound


Sent from my iPhone using Tapatalk
Mahuzz13 is offline  
post #90 of 133 Old 10-14-2018, 08:50 AM
AVS Forum Special Member
 
Jk7.2's Avatar
 
Join Date: Apr 2015
Location: Detroit area
Posts: 3,080
Mentioned: 90 Post(s)
Tagged: 0 Thread(s)
Quoted: 1525 Post(s)
Liked: 2740
Quote:
Originally Posted by Mahuzz13 View Post
Ok so crisis averted, all it was a lose crimped connectionwhere the wires go up to the toggle switch, the wire wasn’t touching the connector nor the spot where it goes onto the toggle switch. After speaking to @Eng 399 Mike last night on the phone he walked me through some steps I should go through before I think about sending the crossovers to someone to look at them. Now that would of been a pain in the rear.

I’m going to post some pictures of some challenges I went through not knowing and not have a manual so I hope this may help someone else that may build these.


It doesn’t have to this brand but you will need at least 3 rolls at 17’ to do all the ports and woofers
Unwind enough and pull the backing off makes it way easier to use and rap around the woofer and port

This is a must test you each speaker to make sure everything works before screwing everything in place

If you install the bracket that hold the waveguide like this it will be recessed which looks wrong as I found out later do it like this....
I also put drywall screws and washers on the two outside degree angle spots to secure the waveguide from shaking, don’t over tighten, just enough to stop the movement but still allowing them to turn.

When wiring the Neutrik keep one wire shorter if you don’t have different colour wire so you know that the shorter one goes to the MF and the longer one goes to the HF

I put the rubber feet on as well that came with

This at a full angle 15 degrees which is way to much but just to show you how much you have to play with.

Ok so here they are....




Now I have to hook them all up to see how they sound


Sent from my iPhone using Tapatalk


Man they look good! Congratulations!! Nice work. Now hook em up!
Jan3 likes this.
Jk7.2 is online now  
Sponsored Links
Advertisement
 
Reply DIY Speakers and Subs

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