I reviewed the Rogue Audio Cronus Integrated amplifier back in 2006 and was mightily impressed and I remain so with most of the gear I’ve had the pleasure of hearing from the PA-based company from then till now.
So I am very excited to see and hear their new KT-88 based M-250 Ultra Monoblock Amplifiers that can be run in Ultralinear or Triode mode with the flip of a switch delivering 250 wpc in Ultralinear mode.
Features:
- Monoblock design for perfect channel separation
- Massive high storage linear power supply
- Ultra-high performance transformers
- Built in bias meters
- All precision components
- 6 x KT88, 2 x 12AU7, 1 x 12AX7 tubes per amp
- Heavy-duty rhodium plated RCA connectors
- Heavy-duty rhodium plated binding posts
- Balanced (XLR) and RCA inputs
- Both 4 and 8 ohm binding posts
- User selectable triode/ultralinear output
- Fully tested, burned-in, and auditioned
- Entirely designed and built in the USA
4 and 8 Ohm speaker taps are provided along with balanced XLR and single-ended RCA inputs.
The new Rogue M-250 Ultra Monoblock Amplifiers ($18,995/pair) will be paired with a Rogue RP-7 v2 preamplifier driving Magnepan 2.7x speakers in Room 388 at Axpona 2026.
Here’s the press release:
Rogue Audio Is Proud to Announce the M-250 Ultra Monoblock Tube Amplifiers
March 2, 2026—Rogue Audio will be at Axpona 2026 sharing Room 388 with Magnepan and Darwin Cable Company. Rogue will be unveiling the new M-250 Ultra monoblock tube amplifiers. It will be matched with the recently released Rogue Audio RP-7 v2 preamplifier and driving Magnepan 2.7x speakers. The M-250 Ultras will be succeeding Rogue’s Apollo Dark Monoblocks.
The M-250 Ultra Monoblocks are fully tubed power amplifiers that will output 250 WPC using KT-88 power tubes in ultralinear mode.
Features of the new Rogue Audio M-250 Ultras include:
- XLR and RCA inputs
- 8 Ohm and 4 Ohm speaker taps
- Ultralinear/Triode switch
- Massive Linear Power supply
The US list price for the M-250 Ultras is $18,995.
Axpona takes place this year Friday April 10th through Sunday April 12th in Schaumburg, IL at the Schaumburg Renaissance. Rogue Audio will be displaying the new M-250 Ultra Monoblocks and the RP-7 v2 balanced preamplifier in Room 388.
Other equipment exhibited will include:
- Magnepan 2.7x speakers
- Darwin Cables interconnects, speaker wires, and power cables
- Eversolo T8 Streamer
- Garlubidor Divinity DAC
About Rogue Audio
Rogue Audio was founded in 1996. Rogue amplifiers are sold in the United States and Canada through a network of ninety dealers. Rogue is also sold in more than 30 countries across Europe, Asia, Australia, and South America.
Company Website: Rogue Audio