Believe it, I bi-amped Kappa 9s with a pair of Sony TA-N80ES amplifiers together with a Sony TA-E80ES pre-amp for the last twenty years without any problem. I was in love with the Kappa 9s and decided to buy them even though the salesperson at the local high end electronics store has warned me they will destroy my Sony amps in few minutes. At first I was very careful with the volume level, then after playing the first album I cranked up the volume level and went through couple more albums without any problem, I was happy enough to call the salesperson and let him know my Sony amps could drive the Kappa 9s and also invited him over to my house and with my permission he cranked up volume to the highest level our ears could handle and by the look at his face, I knew he was shocked to see my Sony amps could happily run the Kappa 9s. Anyway, I highly recommend any Kappa 9s owners out there to look for a pair of Sony TA-N80ES amps on Ebay or Craiglist, and depend on condition might cost between $400 to $600 each.
Here's my email address if you have any questions about Sony amps: 7matchpoint@gmail.com
Specifications:
1. General
System: analog
Color: 1=Silver, 2=Black: 2 (Wood Sides)
Power consumption: 510 W @ 120/240 V
Power Amplifier
Speaker Outputs: 2 x 2 Speakers; Phones
Continuous Power 4Ω: 270 +270 (THD 0.006%)
230 + 230 (6Ω, THD 0.005%) Watts
Continuous power 8Ω: 200 + 200 (THD 0.004%)
1 x 610 (Mono) Watts
Frequency Response: 1-200,000 HZ
Input Sensitivity: 1,000 (balanced)
500 (balanced) mV
Input Impedance: 30 (unbalanced)
0.6 (balanced) kΩ
Harmonic Distortion: 0.004 (4Ω)
0.003 (6Ω)
0.0018 (8Ω) % at rated output
2. Physical
Dimensions in Inches: 18.50 x 7.28 x 17.32 (w) x (h) x (d)
Dimensions in mm: 470 x 185 x 440 (w) x (h) x (d)
Weight in lbs: 52.91 lbs
Weight in Kg: 24 Kg
