subsonic filter
Guest
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Hey Jmac, what were the parameters of the test? Can you get the average SPL to be centered on the 0 dB line? Did you feed the sources outputs directly into the measurement devices inputs? What program is that, as it shows quite a bit of info below 15 Hz and I would highly doubt there is any below that on that album.
500 Watt CAFz'r
Joined: May 2004
Posts: 718
ok...
so i have a subsonic filter on my amp...don't really know how it works though....i usually just keep it turned off. but i'd like to try it out to see what type of a difference it makes. what frequency should i set it at? and then what music/tones should i play? and what should i look/listen for?
by turning on the subsonic filter i'm guessing that i'm using more power on the amp right?
so i have a subsonic filter on my amp...don't really know how it works though....i usually just keep it turned off. but i'd like to try it out to see what type of a difference it makes. what frequency should i set it at? and then what music/tones should i play? and what should i look/listen for?
by turning on the subsonic filter i'm guessing that i'm using more power on the amp right?
Guest
Posts: n/a
No, you are not changing the power of the amp at all. You are simply adding a high pass crossover to your system at it's lowest frequencies. You shouldn't have to change any of your musical preferences to see if you like it.
A subsonic filter is a necessity if you have your system ported and tuned to a high frequency for SPL purposes. I had a friend with two CV Strokers in a wall in an Eagle Talon. He had four Crossfire 1000D's. His box was tuned to somewhere around 55 Hz, after about 15 minutes of listening to some rap music his subs were toast. He had the subsonic filter turned off, if he had it on his subs probably would have been fine, his subs would have been fine if he tuned to 30 Hz as well.
A subsonic filter is a necessity if you have your system ported and tuned to a high frequency for SPL purposes. I had a friend with two CV Strokers in a wall in an Eagle Talon. He had four Crossfire 1000D's. His box was tuned to somewhere around 55 Hz, after about 15 minutes of listening to some rap music his subs were toast. He had the subsonic filter turned off, if he had it on his subs probably would have been fine, his subs would have been fine if he tuned to 30 Hz as well.
500 Watt CAFz'r
Joined: Oct 2004
Posts: 870
You should notice a bit tighter bass with the filter on. At least if you have a ported box.
If you're using a sealed box, you may notice a bit less low frequency extension.
You should be able to see less cone movement with the filter on....and if you don't hear less bass, but see less movement, then leave it on, cause that means it's working.
It will actually cause the amp to use less power.
If you're using a sealed box, you may notice a bit less low frequency extension.
You should be able to see less cone movement with the filter on....and if you don't hear less bass, but see less movement, then leave it on, cause that means it's working.
It will actually cause the amp to use less power.
Guest
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Originally posted by Car Trek:
It will actually cause the amp to use less power.
It will actually cause the amp to use less power.
) and the rest may be potentially acceptable with additional stipulations.
500 Watt CAFz'r
Joined: Oct 2004
Posts: 870
Do elaborate.
I'm sure for simplicity, I've left out a few stipulations, but statements like "I disagree, cause I've never needed it" add nothing but confusion to an already technical topic.
Perhaps you've reached a plateeu that "what I've got is as good as it gets", and have no desire to push the envelope.
You already stated that SS filter's can save power, but how is that possible if there is no information to filter.
Seems a bit contradictory.
I'm sure for simplicity, I've left out a few stipulations, but statements like "I disagree, cause I've never needed it" add nothing but confusion to an already technical topic.
Perhaps you've reached a plateeu that "what I've got is as good as it gets", and have no desire to push the envelope.
You already stated that SS filter's can save power, but how is that possible if there is no information to filter.
Seems a bit contradictory.
500 Watt CAFz'r
Joined: Dec 2000
Posts: 952
Originally posted by Miluni:
Is this any different form the infrasonic filters that come with some amps?
Is this filter a good idea to have in a SQ car?
Is this any different form the infrasonic filters that come with some amps?
Is this filter a good idea to have in a SQ car?
The correct term is "INFRA-SONIC" .(below hearing range of humans)
I know alot of people here have been in the industry for so long, you should know better than to go with the flow, and correct people that erroneously use the term "subsonic". (write your MLA, and senators to abolish this term in our industry.)
500 Watt CAFz'r
Joined: Oct 2004
Posts: 870
The odds of changing the terminology that 90% of the world understands is pretty small, I think.
Since almost every amp made calls their 20Hz high pass filter a "subsonic filter", I doubt if you will change their minds.
R.A Heinlein was using the term "subsonics" to describe tones below the threshold of human hearing in 1942 when he started out writing the best science fiction of his day.
There are many other misnomers in the scientific world (planetary nebulas have nothing at all to do with planets), but the terms stick, because everyone knows what you are talking about.
Go with the flow of evolution, or fight a losing battle forever.
I ponder why almost every sub amp of substance has a sub-sonic filter, unless the engineers subjectively feel a substantial need to eliminate the subsonics from their product. Perhaps they feel that their stuff would be considered substantially substandard without it, and to include it would be sublime.
Since almost every amp made calls their 20Hz high pass filter a "subsonic filter", I doubt if you will change their minds.
R.A Heinlein was using the term "subsonics" to describe tones below the threshold of human hearing in 1942 when he started out writing the best science fiction of his day.
There are many other misnomers in the scientific world (planetary nebulas have nothing at all to do with planets), but the terms stick, because everyone knows what you are talking about.
Go with the flow of evolution, or fight a losing battle forever.
I ponder why almost every sub amp of substance has a sub-sonic filter, unless the engineers subjectively feel a substantial need to eliminate the subsonics from their product. Perhaps they feel that their stuff would be considered substantially substandard without it, and to include it would be sublime.
