Rogue Audio M-250 Ultra Monoblock Power Amplifiers

The M-250 Ultra is a tube monoblock power amplifier from Rogue Audio, rated at 250 watts in ultralinear mode. Each amplifier uses six KT88 output tubes, two 12AU7 and one 12AX7, with user-selectable triode or ultralinear output.

Inputs are balanced XLR and RCA, and the outputs are Cardas binding posts with 4 and 8 ohm taps.

Specifications

• Power: 250 watts, ultralinear mode (each amplifier)
• Tubes: 6 x KT88, 2 x 12AU7, 1 x 12AX7 (each)
• Operation: user-selectable triode or ultralinear
• Inputs: balanced XLR and RCA
• Input sensitivity: 1.0 V RMS
• Outputs: Cardas binding posts, 4 and 8 ohm taps
• Dimensions: 12.5 x 13 x 18 in (W x H x D), each
• Weight: 88 lbs (39.9 kg) each