converting full range to low range for a sub

[familyguy9877]

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



Thanks

 

[Cal Weldon]

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.

 

[familyguy9877]

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

 

[familyguy9877]

Hi There's no link.

it can be done for less money at line level

What do you mean by that?

 

[Cal Weldon]

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

 

[theAnonymous1]

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?

 

[GloBug]

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.

 

[Cal Weldon]

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.

 

[familyguy9877]

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?

Thanks

 

[familyguy9877]

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.

 

[familyguy9877]

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.

the sound was added after the video, but the same song was playing on the speaker at the time. I did this because the video was to show off how the amp was set up, not how good that particular speaker was.

 

[Cal Weldon]

If it's going to stay hooked up in your house you could get a bass management system. Reckhorn makes an inexpensive one that might be just right. The B2.

www.reckhorn.com - Active x Over

 

[familyguy9877]

I see, I think that would work good for my purposes but I can't seem to find a price anywhere on there site (other than shipping) which doesn't seem to list the united states i'm also on a very tight budget. so it probably wouldn't work for me unless it was under $20-$25 U.S.

 

[familyguy9877]

I see, I think that would work good for my purposes but I can't seem to find a price anywhere on there site (other than shipping) which doesn't seem to list the united states i'm also on a very tight budget. so it probably wouldn't work for me unless it was under $20-$25 U.S.

I actually also had a similar idea, that was to hook up an equalizer, but I quickly realized that that would not work.

 

[familyguy9877]

If it's going to stay hooked up in your house you could get a bass management system. Reckhorn makes an inexpensive one that might be just right. The B2.

www.reckhorn.com - Active x Over

As and update, the reckhorn is pretty much out of the question because when I found the price it translated to $80 U.S.

Any other ways for between $20-$25 U.S.?

 

[Cal Weldon]

You can try and find a broken amp with a big ol' transformer in it and use that for a choke coil and then buy an inexpensive capacitor as a shunt. That would be a passive speaker level crossover but you have to take someone with you that knew what they were looking for. Other than that you can buy an iron core choke like this one:

Erse Super Q 12mH 16 AWG 500W Inductor 266-948

 

[familyguy9877]

I just wish there was a cheap and effective solution (even at line level) because even that little coil is $30 I may just need to look for a head unit that can convert it because like I said I don't really want to spend more then $20-$25 tops.

 

[theAnonymous1]

I thought I had a 2-way electronic car audio crossover around here somewhere I was going to offer you, but I can't seem to find it in my pile-o-mess. I'll give it another go tomorrow.

 

[Cal Weldon]

It sounds like you need someone who knows a bit about electronics to give you a helping hand if you need to do it on the cheap. Not sure there's a better way to put it. Maybe some others have an idea.

Good luck with it.

 

[familyguy9877]

I thought I had a 2-way electronic car audio crossover around here somewhere I was going to offer you, but I can't seem to find it in my pile-o-mess. I'll give it another go tomorrow.

Did you ever find it? Please tell me yes.