SVS PC ultra has SERIOUS bass

[Beta Man]

Originally Posted by cpgator

Here is my point - just having a sub that can produce 10 or 12 hz is not important (to me). Obviously no one can hear sounds that low, only feel it. However, to feel it, it needs to hit that range with enough authority (SPL) for those sound waves to be felt.

Also, since most movies and music don't contain notes that low, I am not sure of the point.

The most important info on a sub to me is how well it produces the range found in most soundtracks (probably 20 - 40 hz). I want a sub that produces these frequencies with power and low distortion. If a sub that can do this can also hit 10hz, then that is a bonus. I just see many people concentrating too much on just how low a sub can go, and not apparently caring about the rest.

I have two subs in my theater - Paradigm Servo 15 and a Seismic 12. I have no idea exactly how low they can go, but I do know they sound amazing when watching movies or listening to music - and that is what is important to me. I am sure there are subs out there that can go lower, but that doesn't mean they are better subs (though they certainly could be).

With the exception of my lunch, nothing today has been more agreeable than your post...... BRAVO!!!!!

[dobyblue]

Originally Posted by richteer

Judging by the frequency response graphs you posted, I'd say the Servo 15 was the superior sub. Not only does it go lower (in Hz), but it's response curve is smoother too. The newer, more powerful, sub has a bump at around 30 Hz.

The first four test signals are identical it seems to me, with the older Servo losing more dB between 25-15Hz.
The newer Servo has much less distortion as well.

20Hz

Old
Input 105dB
Output 91dB (-16dB)
THD 12%

New
Input 105dB
Output 98dB (-7dB)
THD 7%

25Hz

Old
Input 105dB
Output 100dB (-5dB)
THD 8%

New
Input 105dB
Output 101dB (-4dB)
THD 5%

[ay221]

Originally Posted by cpgator

Here is my point - just having a sub that can produce 10 or 12 hz is not important (to me). Obviously no one can hear sounds that low, only feel it. However, to feel it, it needs to hit that range with enough authority (SPL) for those sound waves to be felt.

Also, since most movies and music don't contain notes that low, I am not sure of the point.

The most important info on a sub to me is how well it produces the range found in most soundtracks (probably 20 - 40 hz). I want a sub that produces these frequencies with power and low distortion. If a sub that can do this can also hit 10hz, then that is a bonus. I just see many people concentrating too much on just how low a sub can go, and not apparently caring about the rest.

I have two subs in my theater - Paradigm Servo 15 and a Seismic 12. I have no idea exactly how low they can go, but I do know they sound amazing when watching movies or listening to music - and that is what is important to me. I am sure there are subs out there that can go lower, but that doesn't mean they are better subs (though they certainly could be).

The whole point of this thread was Nelly Furtado's "Childhood Dreams", which constantly plays pipe organ at around 10 to 15 hz.

[cpgator]

Originally Posted by ay221

The whole point of this thread was Nelly Furtado's "Childhood Dreams", which constantly plays pipe organ at around 10 to 15 hz.

Never heard the song, but I would be extremely surprised if it had a pipe organ reaching 10 hz. That would take about a 60 foot pipe (I think). Most pipe organ max out at a 16 ft pipe (about 32hz).

[Beta Man]

I think everyone can agree it's a very nice sub though...... that being said, this argument of how low this sub, or that sub goes.... is kind of a Mute Point.

[dobyblue]

Originally Posted by ay221

The whole point of this thread was Nelly Furtado's "Childhood Dreams", which constantly plays pipe organ at around 10 to 15 hz.

The lowest note of a pipe organ is 16.4Hz.

If it's lower than that, it's not a pipe organ; it's synthesized.

[dobyblue]

Originally Posted by Beta Man

I think everyone can agree it's a very nice sub though...... that being said, this argument of how low this sub, or that sub goes.... is kind of a Mute Point.

I'm guessing your incorrect spelling of "moot" was a pun?
If so, that's rather clever of you.


(Being that for most subs people own here on this forum and in most forums, 10Hz would sound like a system on "Mute")

[Beta Man]

Originally Posted by dobyblue

I'm guessing your incorrect spelling of "moot" was a pun?
If so, that's rather clever of you.


(Being that for most subs people own here on this forum and in most forums, 10Hz would sound like a system on "Mute")

Capitalized for emphasis

EDIT:::::

My preference in laptops right now isn't Apple-Pro to the conversation (sorry couldn't help it)

[ay221]

Originally Posted by Beta Man

I think everyone can agree it's a very nice sub though...... that being said, this argument of how low this sub, or that sub goes.... is kind of a Mute Point.

I had read that that particular song went down to 10-15, however another post I read said 17hz. So it is probably that. How low a sub goes is not mute, as my old one only went down to 27 hz.

[cpgator]

Originally Posted by ay221

I had read that that particular song went down to 10-15, however another post I read said 17hz. So it is probably that. How low a sub goes is not mute, as my old one only went down to 27 hz.

Regardless of how low that song actually goes, you have a great sub (the rest of your set up ain't too bad either). If you really want to test the limits of your sub, there are plenty of places you can download test tones - just dl a 10hz tone and check it out.

[Blu Haze]

Originally Posted by ay221

The whole point of this thread was Nelly Furtado's "Childhood Dreams", which constantly plays pipe organ at around 10 to 15 hz.

Lol u guys are funny as hell. All technical audioflies.....

[cpgator]

Originally Posted by Blu Haze

All technical audioflies.....

Audioflies?

[ay221]

Originally Posted by cpgator

Regardless of how low that song actually goes, you have a great sub (the rest of your set up ain't too bad either). If you really want to test the limits of your sub, there are plenty of places you can download test tones - just dl a 10hz tone and check it out.

Is there a good software to test what frequencies a CD contains? I played both at 15 and 10 hz. 15 has more slam, but I can feel more low vibrations when configured at 10 hz setting. I looked at the info on my CD, and it states Huge Organ, Chimes, 64-foot Pipes.

[cpgator]

Originally Posted by ay221

Is there a good software to test what frequencies a CD contains? I played both at 15 and 10 hz. 15 has more slam, but I can feel more low vibrations when configured at 10 hz setting. I looked at the info on my CD, and it states Huge Organ, Chimes, 64-foot Pipes.

I know there are some programs that will show you this - shown in a waterfall graph. I have seen the graphs, but I don't know the name of a program.

I suppose it is possible they used a 64 ft pipe organ, but I doubt it. I believe there are only two in the world, one of which I don't believe is working. Most likely it was a much more common 32 ft with a stopper which makes it act like a 64. Also, just because they used a 32/64 ft pipe organ does not mean they actually used that last pipe.

I have no doubt that the song has some great bass, but with out knowing how low it actually goes, and at what point, it doesn't work well as a sub tester. If your sub wasn't able to produce a note, you wouldn't even notice.

[ay221]

Here is a photo using Sonys Sound Forge 8 to show the frequencies of that song mentioned. Two snapshots were taking to show the different timestamps, one was at the 10hz range, the other around 16hz.

[cpgator]

Does it show you at exactly what point in the song it hits the 10 hz? Also, what does the 32db mean?

[dobyblue]

Originally Posted by ay221

Here is a photo using Sonys Sound Forge 8 to show the frequencies of that song mentioned. Two snapshots were taking to show the different timestamps, one was at the 10hz range, the other around 16hz.

-100dB @ 5Hz? Sounds like overhang of a kick drum as well...incredibly low but not audible at all compared to the other material.

Or am I not understanding the layout?

[ay221]

I just found the software and I'm no expert in understanding it. It only hit it twice at the 10 hz, one around 45 seconds into the song, and one near the end. Most of the deep notes is at the 16 hz level and 25 hz I believe, which hits at a higher db level. I will need to experiment to feel what is different (if any) at those times.

[dobyblue]

Here's an upload of some test tones for you.
They're 10 seconds each and run from 10Hz to 300Hz.
You can unzip it and burn it to CD.
Each track covers 10 Hz.
So track 1 is 10-19Hz.
Track 2 is 20-29Hz.
And so on.

http://download.yousendit.com/9329725A771570D0

Enjoy.

[MatrixS2000]

Originally Posted by ay221

Here is a photo using Sonys Sound Forge 8 to show the frequencies of that song mentioned. Two snapshots were taking to show the different timestamps, one was at the 10hz range, the other around 16hz.

A scale that goes from 0 dB to -100dB in about a inch, is pretty well useless as the difference between 0 and -100dB is 10M X. There is not enough granularity in that scale.