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Old 13th November 2011, 03:45 PM   #1
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Talking converting full range to low range for a sub

I have a 10" alpine sub in a ported box hooked up with a computer PSU and an old 100w optimus amp in my room, the problem is I need to figure out how to convert the full range audio which is going into the amp to a low frequency for the sub sub so it doesn't distort and sound bad. I figure that I could do it with a head unit that supports "sub out" but i'm not sure how long it would take me to find one for cheap or free. this is really annoying me, does anyone have an answer?

P.S. here is a link to a video of how I have the amp set up with the psu.

Car amplifier in your house - YouTube



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Old 13th November 2011, 03:57 PM   #2
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Hi There's no link.

You can do it with a passive XO or if the input can be filtered, it can be done for less money at line level, which is essentially what is being done with the sub out on a head unit.
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Old 13th November 2011, 04:00 PM   #3
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Quote:
Originally Posted by Cal Weldon View Post
Hi There's no link.

You can do it with a passive XO or if the input can be filtered, it can be done for less money at line level, which is essentially what is being done with the sub out on a head unit.
Sorry about that heres the link

Car amplifier in your house - YouTube
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Old 13th November 2011, 04:50 PM   #4
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Originally Posted by Cal Weldon View Post
Hi There's no link.

it can be done for less money at line level
What do you mean by that?
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Old 13th November 2011, 05:27 PM   #5
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If you are running the amp to a single woofer with no other speakers on that amp, the input (line level) can be filtered. Doing it at line level means the components will be less expensive than doing it at speaker level. Planet10 has a calculator here:

TLS.org | Passive Line-Level Crossover
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Old 13th November 2011, 05:39 PM   #6
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Originally Posted by Cal Weldon View Post
If you are running the amp to a single woofer with no other speakers on that amp.....
Yes, and I see a 6x9 playing in the video; so is the amp powering only the sub or not?
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Old 13th November 2011, 05:59 PM   #7
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It seems to me the sound is not coming from a mic, rather it's a recording added to your video. The sound is in STEREO while your demonstrating your MONO amp, and the sound doesn't change when you move your camera around.

Not to say that someone could not record with 2 mics, I just don't think that is the case here.

You even tried to trick us by turning it off, then on again.
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Old 13th November 2011, 06:01 PM   #8
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Yes, and I see a 6x9 playing in the video; so is the amp powering only the sub or not?
I think it's a dedicated amp. At the 0:47 mark, it reads "bridged to mono" or words to that effect.
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Old 13th November 2011, 10:10 PM   #9
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Quote:
Originally Posted by Cal Weldon View Post
If you are running the amp to a single woofer with no other speakers on that amp, the input (line level) can be filtered. Doing it at line level means the components will be less expensive than doing it at speaker level. Planet10 has a calculator here:

TLS.org | Passive Line-Level Crossover
Is there any device that automatically does this? or could you explain in lehmans terms what I would need to do to achieve this?

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Old 13th November 2011, 10:13 PM   #10
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Originally Posted by Cal Weldon View Post
I think it's a dedicated amp. At the 0:47 mark, it reads "bridged to mono" or words to that effect.
that was only setup for the video with the 16x9 now I have it bridged mono direct connected to the sub and nothing else, sorry for being a little bit un-clear. it is completely detected to the sub only now.
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