Sealed sub modeling help - Home Theater Forum and Systems - HomeTheaterShack.com

 
Thread Tools
post #1 of 10 Old 03-22-18, 11:47 PM Thread Starter
Senior Shackster
Solid7
 
Join Date: Jan 2008
Location: Florida
Posts: 176
Sealed sub modeling help

OK, so I've been toying with the idea of building a sealed subwoofer, to pair with a Zaph ZRT kit that I've recently purchased. I've already got several SoundSplinter RL-P15s at my disposal, so I'm gonna use them.

When I look at the SS website, these are recommended (optimally) in a 4.6 cu. foot box. However, when I model them, this is accomplished by assigning a QTC of .500. If I set QTC to .707, I get something more like 1.46 cu. ft - which seems impishly small.

Can someone please talk me through this? According to what little I know about T/S parameters, this sub, with a QTS of .333, is, in theory, better suited for a ported application. (I know that's a guideline, and not an absolute)

This is going to be mostly for general listening. I mean, if I wanted to blow the house down, in the space that I have available, I'd just go get the SVS SB16-Ultra. But I don't. I want something that's enjoyable all the way across the spectrum, but not just an obnoxious noisemaker.

Oh, yeah, and I'll probably end up building 2 of these.

Thanks in advance.
solid7 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 03-23-18, 12:15 AM
HTS Senior Moderator
 
fusseli's Avatar
 
Join Date: May 2007
Location: Colorado, USA
Posts: 1,921
My System
Re: Sealed sub modeling help

I'd go for the smaller QTC .707 size of 1.5cuft. You might ask SoundSplinter directly and see what they ahve to say about their recommended box size that is larger with the low QTC.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
fusseli is offline  
post #3 of 10 Old 03-23-18, 01:08 AM Thread Starter
Senior Shackster
Solid7
 
Join Date: Jan 2008
Location: Florida
Posts: 176
Re: Sealed sub modeling help

I certainly wish that I could ask them. Unfortunately, as I recently learned, the owner has passed away, and the webform is broken, so I cannot get ahold of anyone. (plus, every item on their website shows out of stock)
solid7 is offline  
 
post #4 of 10 Old 03-23-18, 08:08 PM
HTS Senior Moderator
 
fusseli's Avatar
 
Join Date: May 2007
Location: Colorado, USA
Posts: 1,921
My System
Re: Sealed sub modeling help

I'm sorry to hear that! I'd go with your calculated size, then. Some EQ and amp power will adapt those to about any environment.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
fusseli is offline  
post #5 of 10 Old 03-24-18, 02:03 PM Thread Starter
Senior Shackster
Solid7
 
Join Date: Jan 2008
Location: Florida
Posts: 176
Re: Sealed sub modeling help

What's the tradeoff, in real terms? (to my ears)

Interestingly enough, I was given the suggestion of the 15" Dayton Ultimax (UM15-22) drivers as a like-for-like replacement, and I see that it also wants to be in a box more on the order of 4-ish cu. ft. I'd like to build the smaller box, but with support for the SS apparently gone, I'd like to think ahead, also. The Dayton presents a nice drop-in option, should these go bad.
solid7 is offline  
post #6 of 10 Old 03-24-18, 02:18 PM
HTS Senior Moderator
 
fusseli's Avatar
 
Join Date: May 2007
Location: Colorado, USA
Posts: 1,921
My System
Re: Sealed sub modeling help

The larger box would slightly boost the low range, but would reduce power handling since the larger volume would appear more open to the driver.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
fusseli is offline  
post #7 of 10 Old 03-24-18, 02:29 PM Thread Starter
Senior Shackster
Solid7
 
Join Date: Jan 2008
Location: Florida
Posts: 176
Re: Sealed sub modeling help

It sounds like you're telling me that I'll get a good sound out of it, not matter what I do. The tradeoff will be in power handling and EQ setting, only. (if we ignore the frequency response - I'll get what I need in any case)
solid7 is offline  
post #8 of 10 Old 03-24-18, 02:33 PM
HTS Senior Moderator
 
fusseli's Avatar
 
Join Date: May 2007
Location: Colorado, USA
Posts: 1,921
My System
Re: Sealed sub modeling help

Yep, all in all I don't think you can go wrong. If the subs are for a very open room/environment, you'll want to consider adding EQ later if you find yourself missing some of the LF. Linkwitz Transform (LT or low shelf) filter is popular for home theater applications of sealed subs.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
fusseli is offline  
post #9 of 10 Old 03-24-18, 02:40 PM Thread Starter
Senior Shackster
Solid7
 
Join Date: Jan 2008
Location: Florida
Posts: 176
Re: Sealed sub modeling help

I've got EQ, already. I've got a Reckhorn B-1 for high-pass, and a BFD 1124. Should be good to go. I'm not exclusive to HT with these subs. (it will probably be the smallest part, in fact) But I think I'm covered. Unless you can think of anything else that I might need to consider.
solid7 is offline  
post #10 of 10 Old 03-24-18, 02:52 PM
HTS Senior Moderator
 
fusseli's Avatar
 
Join Date: May 2007
Location: Colorado, USA
Posts: 1,921
My System
Re: Sealed sub modeling help

Sounds like you're all set


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
fusseli is offline  
Reply

Bookmarks

Tags
modeling , sealed

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










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



Posting Rules  
You may post new threads
You may 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 is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome