New Infinity Kappa

**veedubb8** · 04-01-2008, 08:10 PM

The new infinity Kappa line just launched. Looks like pretty nice stuff. I noticed they went back to a 4-ohm driver rather than a 2-ohm. I was really happy with last year's stuff, looking forward to hearing the new.

Check It

**AWehmeyer** · 04-03-2008, 07:20 AM

No, they're still 2-ohm speakers and they sound MUCH better than last year's Kappa.

**Sonicxtacy02** · 04-03-2008, 09:06 AM

i've always been a fan of infinity speakers for there outstanding clarity. They are the perfect component set IF you have a sub providing the bass.

**scott_fx** · 04-03-2008, 11:24 AM

tweeter that plays all the way to 35KHz

well that's useless :-)

**emperorjj1** · 04-03-2008, 12:07 PM

lol ^^^^^^^^^^^

**veedubb8** · 04-03-2008, 12:40 PM

Originally Posted by scott_fx

well that's useless :-)

Not entirely. Depends on how much you believe in the effects of harmonics. Your Dyn tweets play all the way up to 22K, but human ears don't hear above 20K, and most adult males don't hear much above 18K.

Also, I realized after I wrote the post that they are 2-ohm speakers, but Infinity uses some sort of marketing hoopla "True Four Ohm" to describe the two-ohm components. I think it has to do something with what the speakers actually measure at when measured at the headunit through the speaker wire - it comes out closer to 4-ohm than the speaker's rated two-ohm. sheesh.

**emperorjj1** · 04-03-2008, 12:45 PM

that is marketing bull****... the reason for 2 ohm speakers is maxing out the power out of your class ab amp. but 2 ohm speakers will fry head units. I bet infinity busted a jl and built 3 ohm speakers and came up with "true four ohm" or just bull****ed and have 4 ohm speakers.

**veedubb8** · 04-03-2008, 01:17 PM

Originally Posted by emperorjj1

that is marketing bull****... the reason for 2 ohm speakers is maxing out the power out of your class ab amp. but 2 ohm speakers will fry head units. I bet infinity busted a jl and built 3 ohm speakers and came up with "true four ohm" or just bull****ed and have 4 ohm speakers.

No, this actually isn't true. Most car stereo amps are Class A/B amps and can actually handle the two ohm stereo load with no problem. And then take the resistance added to into the signal path from the tiny inefficient 20 gauge factory speaker wire, and you essentially have a 3.5-4 ohm load by the time it reaches the factory radio.

**bes51659** · 04-03-2008, 02:13 PM

About marketing bull and talk about speaker impedance I would like to show two pictures. The later one in a ported box. Now, tell me, what impedance has this unit? (And how can impedance be specified without a box?)

Answer: spec says nom. 8ohms!

One more thing. Because of this unlinear speaker load he "tiny factory speaker cable" influence is frequency dependant! The fun never stops!

And more; Even if poweramp survives the dampingfactor is proportional to impedance. In a bad way with low Z. I've never understood these 1-2 ohm guys... and the cables you need with them!

**veedubb8** · 04-03-2008, 09:15 PM

Originally Posted by bes51659

About marketing bull and talk about speaker impedance I would like to show two pictures. The later one in a ported box. Now, tell me, what impedance has this unit? (And how can impedance be specified without a box?)

Answer: spec says nom. 8ohms!

One more thing. Because of this unlinear speaker load he "tiny factory speaker cable" influence is frequency dependant! The fun never stops!

And more; Even if poweramp survives the dampingfactor is proportional to impedance. In a bad way with low Z. I've never understood these 1-2 ohm guys... and the cables you need with them!

Whoa, you win.

I understand there's a difference between the nominal impedance when the speaker's at rest and when the it's actually playing content, and that lots of other factors influence the speakers "active" impedance. However, all I'm saying is that a radio will have no problem with 2-ohm nominal impedance.