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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
pep21
59 posts
 
When I mentioned car audio, I was really thinking about the low impendences (which are similar to car audio), and did not even think of using car amps, but now that you mention it..........
The kapppas would sound great with a Phoenix gold 450 or Zapco running them for sure.
I have alot of respect for the musicallity of some of the car amps.
I own some premium 12volt products myself.
There are some truely excellent car amps on the market, as refined as any home amps.
As far as sound quality goes, I would give the advantage to DC current!
I would worry about the electrical conversion though.
Ac to Dc.
May introduce some noise and negative effects.
Not really sure.
timlub
2,040 posts
 
http://www.stereophile.com/solidpoweramps/sumo_andromeda_power_amplifier/

Stereophile review on the original Andromeda. Stereophile says to use a impedance compensation circuit on certain electrostatics, because they can show a dead short to the amp, but the don't have any record of Andromeda's not handling it. Its all in the article above.
Jtiesel2. You can hunt one of these down for around $350.00 or so. I'd park here on Audiogon and on Ebay. One will come around. Give it a try. You can sell it easy enough. If it works out. I can suggest some people to mod it. A few parts in the right places will take away the dryness I was describing. Good luck, Tim
jtiesel2 OP
11 posts
 
Thanks so much guys. Pro audio has some good looking stuff just not finding exactly what I need being sold used on any of the regular sites at the moment. Wish me luck in repairing the foam woofer surrounds!!
timlub
2,040 posts
 
Jtiesel2,
Do the surrounds actually have holes in them or are they just becoming weak?
I've posted it on Audiogon before. If you have some old latex paint sitting around, open it being careful not to shake it at all. The latex and pigment will be seperated. Several small coats of latex will bring those surrounds back fairly well as long as there are no holes to deal with. Make sure that you use only the clear latex that typically seperates itself from the pigment. I've done this at least 100 times. It works very well. Also,
There are a couple of old threads on audiogon where people had success with Kappa 9's. Here you go:

http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1184547409&read&keyw&zzinfinity
jtiesel2 OP
11 posts
 
Oh man! They were totally fubar!! I spent a few hours learning and fixing them though, it was a fun learning experience. I think it went well they look great!
At least 100 times? You do this for a living?? Thanks for the link!
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