HELP with the INFINITY Kappa9

joz · 23rd October 2010, 08:48 PM

I recently bought a pair of Infinity Kappa9,nice mids and highs but nothing of solid bass ,regardless of the wear of 2 big woofers each unit.PLEASE I NEED HELP TO RESOLVE THIS PROBLEM,it seems its a problem in designing the very swallow cabin.Thanks

back · 23rd October 2010, 08:53 PM

no my friend.the speaker ahave awesome bass but it is almost impossible to drive it.
first look at the back to use normal mode and not extended.
what kind of amp are you using?

tinitus · 23rd October 2010, 09:28 PM

bass is indeed huge, and at times even scary

have you checked if all woofers are moving ?

back · 24th October 2010, 05:11 AM

i think he means the bass is not tight enough and this is usually lack of driving.
this speaker is a known amp killer.

PaleRider · 06:35 AM

With these speakers there`s only one way to go; bi-amp the speakers, bypass the original bass-filters and run the basses through some active filters. Everything else is like beating a dead horse, it won`t run anyway. Use the forum to get some cheap & good stuff.

picowallspeaker · 24th October 2010, 06:40 AM

I remember I saw some Infinity crossover schemes having the woofer preceded by a big (1000uF)electrolytic . Is this the case ?

back · 24th October 2010, 10:21 AM

Quote:

Originally Posted by PaleRider

With these speakers there`s only one way to go; bi-amp the speakers, bypass the original bass-filters and run the basses through some active filters. Everything else is like beating a dead horse, it won`t run anyway. Use the forum to get some cheap & good stuff.

+1.

picowallspeaker · 24th October 2010, 01:12 PM

Oh woe ! those things are huge (but slim! ) !!! Yes I did remember well as I found the crossover schematic now :http://www.infinity-classics.de/infi...ical_sheet.pdf
The woofer section has a built in HP consisting of a 2mF electrolytic . I guess if someone is going to bi-amp the thing , to exclude it from the circuit and replicate it at line level.

tinitus · 24th October 2010, 02:41 PM

Quote:

Originally Posted by back

this speaker is a known amp killer.

yes, it is
yet, I have experienced a cheap NAD driving it, with ok result
but one of the few, as he has burned several other amps
he is now driving them with older Nakamichi, and no problems at all
but my 40watt Mirand still sounded better
a bit of a surprise as I didnt even know if it would survive the test
but yeah, it got hot when activating the EQ function

a bit frightening with only one pair output devices

but it worked, and sounded very very nice

he had never heard them play that good before, or after

but I understand there are two Kappa 9 models ?
btw, I think the woofers were replaced, as the surround had rotted away

Have they maybe been repaired ?

TheShaman · 24th October 2010, 04:33 PM

Quote:

Originally Posted by tinitus

but my 40watt Mirand still sounded better..

It's too bad there is not more interest in this amp.
Is the original designer still around?

23rd October 2010, 08:48 PM	#1
joz diyAudio Member Join Date: Nov 2002 Location: athens greece	HELP with the INFINITY Kappa9 I recently bought a pair of Infinity Kappa9,nice mids and highs but nothing of solid bass ,regardless of the wear of 2 big woofers each unit.PLEASE I NEED HELP TO RESOLVE THIS PROBLEM,it seems its a problem in designing the very swallow cabin.Thanks

24th October 2010, 06:32 AM	#5
PaleRider diyAudio Member Join Date: Nov 2003 Location: home	With these speakers there`s only one way to go; bi-amp the speakers, bypass the original bass-filters and run the basses through some active filters. Everything else is like beating a dead horse, it won`t run anyway. Use the forum to get some cheap & good stuff. Last edited by PaleRider; 24th October 2010 at 06:35 AM.

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23rd October 2010, 08:53 PM	#2
back diyAudio Member Join Date: Nov 2005 Location: crete	no my friend.the speaker ahave awesome bass but it is almost impossible to drive it. first look at the back to use normal mode and not extended. what kind of amp are you using?

23rd October 2010, 09:28 PM	#3
tinitus diyAudio Moderator Join Date: Nov 2005	bass is indeed huge, and at times even scary have you checked if all woofers are moving ?

24th October 2010, 05:11 AM	#4
back diyAudio Member Join Date: Nov 2005 Location: crete	i think he means the bass is not tight enough and this is usually lack of driving. this speaker is a known amp killer.

24th October 2010, 06:40 AM	#6
picowallspeaker diyAudio Member Join Date: Apr 2007	I remember I saw some Infinity crossover schemes having the woofer preceded by a big (1000uF)electrolytic . Is this the case ?

24th October 2010, 01:12 PM	#8
picowallspeaker diyAudio Member Join Date: Apr 2007	Oh woe ! those things are huge (but slim! ) !!! Yes I did remember well as I found the crossover schematic now :http://www.infinity-classics.de/infi...ical_sheet.pdf The woofer section has a built in HP consisting of a 2mF electrolytic . I guess if someone is going to bi-amp the thing , to exclude it from the circuit and replicate it at line level.