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Help power pair of Infinity Kappa 9's please

Hi all!
I have a pair of Infinity Kappa 9's:
Nominal Impedance: 4 to 6 ohm
Power Rating: 60-340 watts RMS
Efficiency: 102 dB SPL @1 watt, 1 meter
Crossover Frequencies: 80Hz, 800Hz, 4500Hz
Frequency Response: 29Hz-45kHz +/-3dB
Physical Attributes:
1x - SEMIT Supertweeter
1x - EMIT Tweeter
1x - 3" Edgewound Voice Coil Polydome Midrange Driver
1x - 5" Polypropylene/graphite Diaphram Polygraph
2x - 12" Cast Frame , L/C Tuned Woofers
Dimensions: 59.5"H x 21.5"W" x 8"D

My room is 12'x12', I have $2500 budget and would like to play music off my computer. I need amp(s), a preamp, and a DAC i guess (is the DAC necessary at my low of a budget range?). I know my budget is low so I will be shopping for very used/old equipment. If anyone has any experience, suggestions, or words of wisdom, they would be very much so appreciated.
Thanks,
JT
jtiesel2
pyite
28 posts
 
Quick update: what makes the sound even worse than mismatched "Extended" modes is when the bottom woofer is wired backward. I re-did the wiring on both speakers and it sounds infinity-ly better now. This seems to be a common problem on these speakers -- I saw a surprising number of "refoamed and sounds crappy" threads.

I still think I’ll want a sub, but obviously the need isn’t quite as great as it was an hour or two ago.
pyite
28 posts
 
Oops I was posting on two different threads.  This must be a popular topic!
The bottom line: I figured out how passive bi-amping works and it sounds wonderful.
The other important piece of information I figured out: the best place to go for all your bi-amping and RCA cable needs is a car audio shop.  They are big time users of crossovers and RCA cables.
stefanovitch
64 posts
 
On the other hand for costs you could try two Threshold SA3, Two pairs of Carver Silver 9T's, two Threshold S300 or a Mark Levinson No.23.

The best results I have gotten with tube /hybrid preamps. If you cannnot afford expensive ones try Audible Illusions Modulus3 or Mfa Magus.

I hope this will get the hassle out of bad reviews.
bobby1945
79 posts
 

I have a pair of the K9's -I bought them new 1988 !

I have matched them successfully for over 30 years with a a pair of Metaxas Solitaire high current power amplifiers.

The speakers and amps are in storage pending my return to Australia- Locked out for 3 years due to covid.

I am going to restore the Solitaires back to factory spec  and get these babies back singing.

english210
169 posts
 

Wow, flashback time. I sold the 9’s at a store in Florida back in the late 80’s. I own the 7’s still, but they need mids replaced. We never did have an amp that would properly drive them, and I alway wondered how they would sound with ‘real’ power to them. Something that could handle the damn-near dead short life they presented. :) 

 

ah, the memories…..

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