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Old 16th September 2011, 03:47 PM   #1071
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Given the 3015lf's huge price increase, and threatened discontinuation, what is a GOOD alternative driver that is still affordable? Kappa Pro 15 lf2? Difinimax 4015?
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Old 16th September 2011, 04:47 PM   #1072
jbell is offline jbell  United States
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absolutely -- both are great candidates for ss15. Don't remember exact posts, but they've been discussed. Kappa pro 15lf2 is the budget winner a db or so down from 3015lf, 4015lf is the output winner with a 4" coil and a db or so up from the 3015lf.

Both iron magnets, both heavier. 3015lf is still the lightweight king.
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Old 18th September 2011, 12:59 PM   #1073
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Forgive me if this info is already here, I am doing this on my phone from work. Is there a real world impedance graph up somewhere? Ideally with the 4015LF cones. Planning my powering scheme. Since the ipr 6000 is and will likely remain vaporware, current thoughts include three per channel on a Crest CC 5500, or something potentially crazier, depending on real world impedance.
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Old 18th September 2011, 01:46 PM   #1074
jbell is offline jbell  United States
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scott (screamersusa) runs 3 subs per on crest amps if I remember right. He's a huge fan of that combination, as 3.2 ohms gets about the most out of most amps.
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Old 19th September 2011, 12:44 AM   #1075
tb46 is offline tb46  United States
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Hi jbell,

Just a quick question: "How do we get to 3.2 Ohms w/ 3ea. 4015LF in parallel?" Hornresp indicates impedance minima of just a hair below 2 Ohms.

Regards,
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Old 19th September 2011, 12:57 AM   #1076
Djim is offline Djim  Netherlands
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Loooooooong wires...
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Old 20th September 2011, 08:03 AM   #1077
FlipC is offline FlipC  United States
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Good question on the 3.2 ohms.
I run 6 per amp at just over 5ohm via Parallel to series.

Haven't had money to experiment on anything new.
Did throw a Dayton DVC385-88 into my test SS15 box. Have it playing in the shop. Works well but it is less sensitive though handles more power.
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Old 21st September 2011, 03:44 PM   #1078
jbell is offline jbell  United States
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Quote:
Originally Posted by tb46 View Post
Hi jbell,

Just a quick question: "How do we get to 3.2 Ohms w/ 3ea. 4015LF in parallel?" Hornresp indicates impedance minima of just a hair below 2 Ohms.

Regards,
It could be bad math on my part... but I usually figure a 'nominal' impedance plus wire, not a minimum when figuring out what I want to run on an amp.

So a 'nominal' 2.67 ohm plus a half ohm of wire gets me to 3.2. (I always figure a half ohm on wire, don't even ask why/where I started doing that...)

Yea not exact, it's just the way I guesstimate things.
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Old 22nd September 2011, 01:58 PM   #1079
tb46 is offline tb46  United States
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Hi jbell,

That's one way of doing it. I just like to look at the low points of the impedance, but I don't have anywhere near the experience with PA that you have.

Regards,
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Old 22nd September 2011, 04:28 PM   #1080
Djim is offline Djim  Netherlands
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1/2 Ohm is way to high and it doesn't matter if it is PA or hifi. In that case the wire would take almost 1/5th of the power...

Last edited by Djim; 22nd September 2011 at 04:30 PM.
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