Home Theater Forum and Systems - HomeTheaterShack.com - Reply to Topic

Thread: Planning an IB Build! Reply to Thread
Title:
Message:
Post Icons
You may choose an icon for your message from the following list:
 

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










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
09-14-12 10:34 AM
Rmb1080p
Re: Planning an IB Build!

The efficiency, the cost, getting a lot more performance out of a driver, increased air coupling, no back wave to worry about. IB is great though, I don't want to sell it too short, I just see horns and specifically Tom Danley's tapped horns to be pretty much the Baddest, most awesome things on the planet!

-RMB
09-13-12 02:07 PM
ironglen
Re: Planning an IB Build!

Quote:
Mattcc22 wrote: View Post
Why would you go horn over IB now? Less cost? Just curious because I've been considering both.
Cost has to be a primary reason as IB supposedly has great sound quality. For overall output/cost a horn has got to be tops, but it needs a hpf along with the time and materials that quickly add up.
09-13-12 09:43 AM
Mattcc22
Re: Planning an IB Build!

Why would you go horn over IB now? Less cost? Just curious because I've been considering both.
09-12-12 12:36 PM
Rmb1080p
Re: Planning an IB Build!

well I'm not sure what to tell ya... I did some more experimenting with mine today and settled on running the lpf at 100hz. When I had my box subs I ran the filter higher and could never notice that much difference, I'm not quite sure how much 100-120 signal is mixed into the lfe channel, but I know it IS spec. I have not felt I've been missing any lfe since my IB subs and my favorite thing about them is not taking up the floor space. If I did it all over again though, I would go Horn and figure a way to have the mouth venting into the room much like the IB.

-RMB
09-12-12 11:53 AM
atledreier
Re: Planning an IB Build!

Quote:
Rmb1080p wrote: View Post
I see I see! Does your processor have a dedicated LFE Low pass setting available in the menus?

-RMB
Yes it does. But it's been confirmed it discards anything above the lowpass setting, it will not redirect to the mains. So to get the entire LFE channel you need to have that set to 120Hz.
09-12-12 07:38 AM
Rmb1080p
Re: Planning an IB Build!

I see I see! Does your processor have a dedicated LFE Low pass setting available in the menus?

-RMB
09-11-12 11:41 AM
atledreier
Re: Planning an IB Build!

LFE is a dedicated channel reproduced by the subwoofer. Subwoofer also gets any redirected bass from any other channel. But with my processor (Onkyo PR-SC5508) there is no way to have any other channel reproduce any part of the LFE, unless you have no subwoofer attached.
09-11-12 09:40 AM
Rmb1080p
Re: Planning an IB Build!

Quote:
atledreier wrote: View Post
No, I love my infrasonics! I also love midbass, but my mains handle that bit. What I am concerned with is the fact that I will lose LFE information if I need to set crossover at 80Hz. Now, if it's only a natural rolloff and no nasty breakup noises I can live with it. As far as I know I have no way to let the mains handle LFE above 80Hz. Note I'm talking about the LFE channel, not redirected bass.
Also, I don't know if I'm making a storm in a glass of water here, there may not be much useful information above 80Hz in the LFE anyway.
I think the redirected bass is part of the LFE signal. If the speakers can handle those frequencies at proper volumes then all should be fine.... there shouldn't be an audio/frequency hole.

A lot of receivers don't have a dedicated high pass setting option for the LFE channel so, when you set a crossover for you main speakers at 80hz I do think it automatically sets one on the lFE in that area too. I could be wrong but I think I read something about this.

So I guess the only way to pump up the 80-120hz area would be to run a dedicated EQ to the speakers.
09-10-12 03:41 PM
atledreier
Re: Planning an IB Build!

No, I love my infrasonics! I also love midbass, but my mains handle that bit. What I am concerned with is the fact that I will lose LFE information if I need to set crossover at 80Hz. Now, if it's only a natural rolloff and no nasty breakup noises I can live with it. As far as I know I have no way to let the mains handle LFE above 80Hz. Note I'm talking about the LFE channel, not redirected bass.
Also, I don't know if I'm making a storm in a glass of water here, there may not be much useful information above 80Hz in the LFE anyway.
09-10-12 11:15 AM
Rmb1080p
Re: Planning an IB Build!

Quote:
atledreier wrote: View Post
From the graphs it looks like you have your lowpass set at 80Hz? How do you get the rest of the LFE?
Any concerns with chest compressing bass? Is it still there after you got rid of your box subs?
I am planning a 4 IB318 build but I am a bit concerned about upper bass performance, since the FIs will be the only thing reproducing the LFE information.
The response starts to naturally roll off a bit after 80hz so I do set the low pass to match. The other lfe comes from my mains which are JTR triple 12s, I high pass them at 60hz so I get some overlap in that area.

I get better mid-bass with the combo of JTR and IB subs than I ever did with my box subs.

Honestly though if you aren't interested in ultra low frequencies and you are looking for mid-bass headroom, I think the best idea would be a couple of THT folded horns. Problem is they take up a good bit of room and the IB as you know, eats no floors space.

From what I have found is that in order to have a really good mid-bass kick especially if you are EQd flat, you need to be pretty upwards in the volume or running the subs hot by a good bit or a combo of both.

Also do not underestimate the importance of acoustics. long Bass decay times can muddy up the tight punch we want.

The IBs sound really good and can provide very tactile low frequencies that you can feel in your gut however, there are other options that may better provide you with what you are looking for.

-RMB
This thread has more than 10 replies. Click here to review the whole thread.

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!

 


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