stevem Messages: 4730 Registered: June 2004 Location: NY
Senior Member
The k200s are made for a 4 ohm load for peak wattage output, the cabs came wired for a 8 ohm load due to the option of buying the amps with two cabs which would have made a 4 ohm load.
Yes, the K100s and K150s want a 6 to 8 ohm load, you can run them at 4 ohms but they will run twice as hot so with a 4 ohm load they should really not be played at more than about half volume.