LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 26 Old 06-10-12, 07:43 AM Thread Starter
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LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings

I have a Teufel Theater 8 THX-UltraII 5.1 speaker setup (http://www.areadvd.de/hardware/teufeltheater8.shtml). Am I correct with the following statements:

1. If I set the Crossover Frequency to 70Hz everything that contains bass in the signal that is send to the fronts, center and rears gets cut of and played by my subwoofer.
2. If I set the LPF of LFE on 120Hz all content in the (5).1 (LFE signal) up to 120Hz is produced my my subwoofer. Condition of this is to set the crossover on the subwoofer to OFF.
3. THe LPF of LFE setting has nothing to do with crossover of frequencies of the main speakers.

If my above statements are correct, I still have remaining settings that I m not sure what to set them too.

1. the setting LFE or LFE+MAIN
and
2. speaker setting Small or Large
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post #2 of 26 Old 06-10-12, 08:36 AM
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Quote:
THX-UltraII wrote:
I have a Teufel Theater 8 THX-UltraII 5.1 speaker setup (http://www.areadvd.de/hardware/teufeltheater8.shtml). Am I correct with the following statements:

1. If I set the Crossover Frequency to 70Hz everything that contains bass in the signal that is send to the fronts, center and rears gets cut of and played by my subwoofer.
2. If I set the LPF of LFE on 120Hz all content in the (5).1 (LFE signal) up to 120Hz is produced my my subwoofer. Condition of this is to set the crossover on the subwoofer to OFF.
3. THe LPF of LFE setting has nothing to do with crossover of frequencies of the main speakers.

If my above statements are correct, I still have remaining settings that I m not sure what to set them too.

1. the setting LFE or LFE+MAIN
and
2. speaker setting Small or Large
You sound as though you have a pretty good handle on it. For your first question by selecting LFE+main all bass below the crossover point will be sent to both the sub and the mains. My experience is this produces over exaggerated bass and does not sound good to me. I prefer all bass going to my sub as that's what it was designed for as well as relieving my AVR's amp of the workload. As for question number two small or large I personally set all of my speakers to small with a crossover of 80. I have found this to sound the best on my system but to each his own. Tinker with it and take notes and choose the settings that sound best to you.
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post #3 of 26 Old 06-12-12, 01:09 PM
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Re: LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings

Crossover with a THX setup should be set at 80hz and your LPF set at 120hz. Based on the THX processing this should provide you optimum enjoyment. Saying that, to each is own and whatever sounds best to your ears in your room is what you should follow. Depending on your room correction setup/program, some processors will ask if THX and automatically set points for best high level listening, i.e. THX reference level.


Brian in Bakersfield...
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post #4 of 26 Old 06-12-12, 02:26 PM
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Re: LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings

Hello,
I am in agreement with the above Posts. Definitely set the LPF of LFE to 120hz. As your Speaker System is THX Ultra2 Certified, definitely set them to an 80hz Crossover which corresponds to a Small Setting on the AVR/SSP Bass Management. I would not do LFE+Main as it would set your Mains to Full Range whereas they are not Full Range Speakers. Truth be told, a tiny portion of Speakers can honestly go down anywhere close to 20hz and those that are cost as much as a very nice Automobile. So I would simply have the Subwoofer handle all frequencies below 80hz. I love Areadvd.de and spend a great deal of time there. Google Translate is a beautiful thing.
Cheers,
JJ

HT
Speakers: Martin Logan Vantage (Mains), Martin Logan Stage (Center), Martin Logan Vista (Surrounds), Martin Logan Montages (Surrounds) Hsu Research VTF-15h MK2, Martin Logan Descent i (Subwoofer)
Amplification: Aragon 8008bb, Parasound HCA-3500, Parasound HCA-2205 AT, Parasound HCA-1000a
AVR/SSP: Denon AVR-4520CI
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post #5 of 26 Old 06-12-12, 03:50 PM
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Re: LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings

Subs look super cool and very interesting, would love to hear a set of those paired monsters
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post #6 of 26 Old 06-15-12, 03:49 PM Thread Starter
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Re: LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings

thxz for all replies guys. Really helpfull.

I now have the following settings:
- Small for all speakers
- Crossover freq. 80Hz
- LPF of LFE 120Hz
- setting LFE+MAIN/LFE set on LFE only

Last thing I need to know is my subwoofer setting. On what freq. do I put my subwoofer rotation button?
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post #7 of 26 Old 06-15-12, 05:43 PM
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Re: LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings

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THX-UltraII wrote: View Post
thxz for all replies guys. Really helpfull.

I now have the following settings:
- Small for all speakers
- Crossover freq. 80Hz
- LPF of LFE 120Hz
- setting LFE+MAIN/LFE set on LFE only

Last thing I need to know is my subwoofer setting. On what freq. do I put my subwoofer rotation button?
What button? Level? Crossover?

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post #8 of 26 Old 06-15-12, 08:23 PM
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Since the only rotating "button" on a sub that affects frequency is normally the low pass crossover, set it to its highest frequency (or off/bypass) and all bass management will be done by the receiver.

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post #9 of 26 Old 06-15-12, 09:25 PM
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Re: LFE, LPF of LFE, crossover, Large/Small, main/main+LFE, confused about settings

Quote:
phreak wrote: View Post
Since the only rotating "button" on a sub that affects frequency is normally the low pass crossover, set it to its highest frequency (or off/bypass) and all bass management will be done by the receiver.
Ah. I missed the "freq." in the post.

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post #10 of 26 Old 06-16-12, 12:18 AM
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Quote:
Kal Rubinson wrote:
Ah. I missed the "freq." in the post.
It's not often that I get to chime in where such an illustrious sharpshooter misses a minor detail, but I thought I would give it a shot. It was probably in one of Kal's informative technical posts in the past that I learned this stuff anyway.

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