Subsonic Filter??

[turtlestrap]

Hi, Im still a novice at car audio and wanted some help. I built a transmission line box for an HDS208 8" woofer.

I did some researching and found some information about setting subsonic filters. For ported boxes, I read, you should set the subsonic at half an octave below tuning frequency of the box.

I also read some information about transmission lines that said they are supposed to have great bandwidth and efficiency such that the output of the box, a whole octave below the tuning frequency, will be just as powerful as the tuning frequency in a lot of cases.

That said, should I be worrying about a subsonic filter? The amplifier I'm planning to get does not have one. I want to get a Rockford Fosgate R500x1D. Amazon Link

Any input would be much appreciated //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

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[Savackz]

I'd get more than 500 for that sundown. It'll take atelast 800 easy.

 

[shizzzon 10+ year member]

I'd get more than 500 for that sundown. It'll take atelast 800 easy.

What are you talking about?

He mentioned SQ and RF... Where is sundown mentioned?

 

[turtlestrap]

Sorry, Its a Soundqubed HDS208 8". Too poor for Sundown ahahah.

 

[jeepguylv]

would you be opposed to looking at a different amp in that price range, there would be lots of choices that would have a subsonic filter.

 

[turtlestrap]

Yeah! As long as it does rated power and of good quality like the RF.

 

[snyderd758 10+ year member]

would you be opposed to looking at a different amp in that price range, there would be lots of choices that would have a subsonic filter.

x2 just as an examplehttp://www.onlinecarstereo.com/CarAudio/p_20681_Soundstream_REF1500.aspx I had the 1.1000 and it sounded really good you would need to come up with $25 more well worth it to protect your sub.

 

[turtlestrap]

x2 just as an examplehttp://www.onlinecarstereo.com/CarAudio/p_20681_Soundstream_REF1500.aspx I had the 1.1000 and it sounded really good you would need to come up with $25 more well worth it to protect your sub.

Why is it rated 500 @ 2 and also 500 @ 1? Im not very well rounded about amplifiers but isn't the rating @ 1 ohm supposed to be higher?

 

[jeepguylv]

just throwing it out there but I have a hifonics brutis 1200.1 for $100 shipped, plenty of power for you and inexpensive with a subsonic filter, only used for a month.

 

[snyderd758 10+ year member]

Why is it rated 500 @ 2 and also 500 @ 1? Im not very well rounded about amplifiers but isn't the rating @ 1 ohm supposed to be higher?

its one of the features of this line makes same power 1 or 2 ohms for flexibility nice if you end up adding or changing subs.

 

[LosIsATool 5,000+ posts]

That RF has a filter.

 

[turtlestrap]

That RF has a filter.

Not a Subsonic filter. Has a low pass filter

 

[LosIsATool 5,000+ posts]

It's set

 

[CSCStang]

The question is do t lines need to have a ss filter set. Looking for the same answer here........

 

[72Impala 10+ year member]

Probably asking on the wrong forum unless you want misinformation.

Short answer I would still use the SS filter if you are not 100% sure what notes all your music plays... Don't want to be surprised by 18hz out of nowhere and throw the coil out of the gap.