Seems it's rated for 4 ohm.

AMPLIFIER SECTION
Power Output
All Channels: 90 W/Ch at 8 Ohms,
20 Hz–20 kHz, 0.08%,
2 Channels Driven, FTC;
110 W/Ch at 6 Ohms,
1 kHz, 0.1%, 2 Channels Driven, FTC
Dynamic Power 210 W (3 Ohms, 1 ch)
180 W (4 Ohms, 1 ch)
110 W (8 Ohms, 1 ch)

Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud