Krell KSA 250 or Threshold S-500

[pajopajo]

Hello
I have speakers Infinity Kappa 9, which drives using two amplifiers (NAD 208 and NAD 2700).
I would have changed the amplifier because I'm not satisfied with BASS area.
I wonder what is better Krell KSA 250 or Threshold S-500.
Is there one kind of experience and whether anyone had similar problems?

Thank you for your answers

 

[illenema]

A Little late but the ksa250 will drive those woofers very well no matter what impedance the are at. 2ohms that amp will give them 1K a channel

 

[Bahamayellow]

I know owners of the 9s use either one of the amps your inquiring about. I'm sure they will chime in. Wish I could afford to power mine with your choices but am using 2 small carvers in bi amp mode on mine. Blows me outta the room as my space is small.