Lower than 20Hz

[FNG212]

I think its "common knowledge" that human hearing ranges from 20Hz to 20kHz. I'm sure there are people who can hear outside that range but it seems to be the most agreed upon limits.

There are companies, I'm going to call out Axiom on this one, that claim subwoofer responses down to 12-13Hz on some of their higher end models. I'm sure it is noticeable as a physical "thump" but here is my main question:

How many sources (music, movies anything) have lower than 20Hz on the sound track to take advantage of the available responses? Explosions are a great example. I'm an Army Engineer, I've blown up plenty of stuff. I know all about the concussion that accompanies a blast. How many audio mixing masters in studios put that data into the sound track?

Thanks.

 

[Adam]

There are certainly some out there. I know that one or more threads on here have discussed it, so a search might come up with a pretty good list. SVS has a list of some recommended bass tracks from movies at the link here with some subsonic bass in there.

 

[mike c]

very many.

http://www.avsforum.com/avs-vb/showthread.php?t=755493

it's what i've been chasing all these years.

 

[jamie2112]

very many.

http://www.avsforum.com/avs-vb/showthread.php?t=755493

it's what i've been chasing all these years.

What......you like subs Mike? Thats just crazy.....

 

[GlocksRock]

I know the "Irene" scene in Black Hawk Down has bass in the 8-9 hz. region, it's from the helicopter blades, but there are only a couple subs that can actually reproduce this frequency.

 

[lsiberian]

I think its "common knowledge" that human hearing ranges from 20Hz to 20kHz. I'm sure there are people who can hear outside that range but it seems to be the most agreed upon limits.

There are companies, I'm going to call out Axiom on this one, that claim subwoofer responses down to 12-13Hz on some of their higher end models. I'm sure it is noticeable as a physical "thump" but here is my main question:

How many sources (music, movies anything) have lower than 20Hz on the sound track to take advantage of the available responses? Explosions are a great example. I'm an Army Engineer, I've blown up plenty of stuff. I know all about the concussion that accompanies a blast. How many audio mixing masters in studios put that data into the sound track?

Thanks.

12hz is the bottom organ note and is used in some very heavy action movies. I believe cloverfield has a lot of subsonic LFE.

The Audiopulse AXIS 15 is capable of around 100 db at 8 hz in a ported monster box of around 10 cubic ft tuned to 8hz.

However to properly form that type of wave you need a huge room.

 

[mtrycrafts]

I think its "common knowledge" that human hearing ranges from 20Hz to 20kHz. I'm sure there are people who can hear outside that range but it seems to be the most agreed upon limits.

There are companies, I'm going to call out Axiom on this one, that claim subwoofer responses down to 12-13Hz on some of their higher end models. I'm sure it is noticeable as a physical "thump" but here is my main question:

How many sources (music, movies anything) have lower than 20Hz on the sound track to take advantage of the available responses? Explosions are a great example. I'm an Army Engineer, I've blown up plenty of stuff. I know all about the concussion that accompanies a blast. How many audio mixing masters in studios put that data into the sound track?

Thanks.

I hope your question has been properly answered

 

[FNG212]

Yes it has but now Isberian has me drooling for one of those AXIS drivers.

 

[lsiberian]

Yes it has but now Isberian has me drooling for one of those AXIS drivers.

WE are all drooling over them. They are the best 15" driver according to Wmax.

Though the 21" Maelstrom coming out might be nice too.

Still to properly use it will require special wiring. IOTW it's too much work for me. I plan to use JL Audio 8w7 drivers in my builds, but that will probably be next year before I do them.

 

[WmAx]

WE are all drooling over them. They are the best 15" driver according to Wmax.

Though the 21" Maelstrom coming out might be nice too.

Still to properly use it will require special wiring. IOTW it's too much work for me. I plan to use JL Audio 8w7 drivers in my builds, but that will probably be next year before I do them.

Actually, the absolute 'best' quality 15" driver would be one using the LMS motor from TC Sounds/Audio Pulse. Sound Splinter (www.soundsplinter.com) has a TC Sounds built 15" subwoofer using the LMS motor: http://www.soundsplinter.com/rls15_subwoofer_information.html

The LMS technology provides for the most linear motors in existence by way of using traditional techniques to lower distortion (copper shorting rings, etc.) combined with an innovative variable density coil. The voice coil actually has different thickness as you move from the center resting position in order to account for the natural motor strength differences(BL) at varying positions. The result is a near perfect flat motor response regardless of 1mm or 30mm position of the coil from center rest position. The means super low distortion and minimum TS parameter changes at different excursions. However, these drivers are rather low in sensitivity; meaning that high power amplification is a must.

The AXIS drivers are one step down from the LMS drivers from Audio Poluse.

-Chris

 

[lsiberian]

Actually, the absolute 'best' quality 15" driver would be one using the LMS motor from TC Sounds/Audio Pulse. Sound Splinter (www.soundsplinter.com) has a TC Sounds built 15" subwoofer using the LMS motor: http://www.soundsplinter.com/rls15_subwoofer_information.html

The LMS technology provides for the most linear motors in existence by way of using traditional techniques to lower distortion (copper shorting rings, etc.) combined with an innovative variable density coil. The voice coil actually has different thickness as you move from the center resting position in order to account for the natural motor strength differences(BL) at varying positions. The result is a near perfect flat motor response regardless of 1mm or 30mm position of the coil from center rest position. The means super low distortion and minimum TS parameter changes at different excursions. However, these drivers are rather low in sensitivity; meaning that high power amplification is a must.

The AXIS drivers are one step down from the LMS drivers from Audio Poluse.

-Chris

I will probably build a 12" Axis for my sub when the time comes. I'm in no hurry as my current setup is adequate for my listening preferences.

I will enjoy to process of creating a new sub very much. I plan to build my MBMs next. Then my new Madisound TMM or mtm cabinets. Then I will undertake the 12" AXIS if they are still on sale at P-E. I imagine I will have a house by that time. But it's fun to build your own speakers. The challenge stretches me and strengthens my resolve and problem solving. I'm quite satisfied with my first build. I look forward to the challenges of your designs. And to sharing my journey with those here.

 

[lsiberian]

Actually, the absolute 'best' quality 15" driver would be one using the LMS motor from TC Sounds/Audio Pulse. Sound Splinter (www.soundsplinter.com) has a TC Sounds built 15" subwoofer using the LMS motor: http://www.soundsplinter.com/rls15_subwoofer_information.html

The LMS technology provides for the most linear motors in existence by way of using traditional techniques to lower distortion (copper shorting rings, etc.) combined with an innovative variable density coil. The voice coil actually has different thickness as you move from the center resting position in order to account for the natural motor strength differences(BL) at varying positions. The result is a near perfect flat motor response regardless of 1mm or 30mm position of the coil from center rest position. The means super low distortion and minimum TS parameter changes at different excursions. However, these drivers are rather low in sensitivity; meaning that high power amplification is a must.

The AXIS drivers are one step down from the LMS drivers from Audio Poluse.

-Chris

The LMS drivers appear to be cheaper.