Stupid question with a little thinking.
DUH!
Above 2400Hz it would be a short circuit to the amplifier.
So is there such a thing as a "Strange First order" crossover?
Part Zobel but also rounding out the sound to avoid harsh breakup and too much treble?
I get a kick out of low cost/zero cost projects like these.
I even cut the hole without using any tools except a scrap of wood and two nails, although I did sharpen one nail so it would cut. The box terminals I rescued from a cheap parts bin when Tandy/RadioShack closed the doors here in Oz, I probably paid a dollar. Foam was an old camping mattress destined for the tip as was the scraps of fibreglass in the old pillowcase
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If your amp is a pure voltage source, all that will happen is that it's outputting more current (due to low impedance) at high frequencies.
A series inductor would roll off the high frequencies by showing high impedance at high frequencies.
However, at frequencies this low, I'd recommend using a spare amplifier and a line-level crossover.
Chris
E-XO is what I normally do, but this is for Doof-Doof at parties and I thought that perhaps rolling the top end off might help a bit/ be a little better. Although I have not done it before I'm remembering something like this being talked about when I made my daughter her bass quad box for her guitar. It used 2* 15's and a pair of 12's and was a little bright. But they were not "proper" bass guitar drivers, just old woofers I had in the shed at the time
I know it's been a while but yesterday I finally got around to hooking this roadkill project up to an amp.
Party set-up is now via an older Rotel multi channel amp with only 40 watts per channel but that is enough to provide a decent basement for the tops I've been using for ages.
Good enough for party use and I have to say that these blue plastic barrels actually make reasonable enclosures; I think the foam roll has helped there but I don't have any complaints about SQ even if it were inside the house.
WAF would be extremely low.
I haven't made a frame for them, I just set up the barrel facing up in the open air. I have another sub also used for parties. The old Kicker EX154 I made about 12 years ago is still going strong.
Using an old Behring CX 2310 crossover before the old Rotel RMB 1048
Party set-up is now via an older Rotel multi channel amp with only 40 watts per channel but that is enough to provide a decent basement for the tops I've been using for ages.
Good enough for party use and I have to say that these blue plastic barrels actually make reasonable enclosures; I think the foam roll has helped there but I don't have any complaints about SQ even if it were inside the house.
WAF would be extremely low.
I haven't made a frame for them, I just set up the barrel facing up in the open air. I have another sub also used for parties. The old Kicker EX154 I made about 12 years ago is still going strong.
Using an old Behring CX 2310 crossover before the old Rotel RMB 1048
Love my Kicker 08S15L74! I've had it 12 years too. It spent 3 years in a truck BP4 enclosure and been in my home theater in a T-TQWT enclosure since 2012.
Love your style moondog!
I saw these barrels at my local junk yard. They were used to store olives. $20 seems like a great deal and it even has some circular ribs for built in bracing. I'd estimate the opening is around 12". Can anyone recommend a sub that can make use of a 220 L box (or barrel as it were)?
I saw these barrels at my local junk yard. They were used to store olives. $20 seems like a great deal and it even has some circular ribs for built in bracing. I'd estimate the opening is around 12". Can anyone recommend a sub that can make use of a 220 L box (or barrel as it were)?
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I'd use any cheap 12" woofer you can find.
Make a frame from timber and stack them 3 high?
Just look for something with a Qts of about 4 or 5, an Fs of 30 or lower and a Vas less than 300litres and hope for the best.
Make a frame from timber and stack them 3 high?
Just look for something with a Qts of about 4 or 5, an Fs of 30 or lower and a Vas less than 300litres and hope for the best.
220 liters closed box is a lot for a single 12", that is close to IB for drivers "that small". Always wanted to try IB.
If you live in europe the Beyma 12BR70 would perhaps be my first choice.
If you live in europe the Beyma 12BR70 would perhaps be my first choice.