The RE 280 MKII stereo amplifier is a push-pull Class A/B power amplifier in ultralinear configuration, rated at approximately 2 x 70W peak power output at 2% THD. The sound of the RE 280 MKII is wide, open, with natural timbre. Listeners don’t think that they are hearing an amplifier, as everything fits and flows harmonically.
The RE 280 set new standards in the year of its initial launch.
This was in 1994; the current RE 280 MKII variant is now in the third technological generation of this model. The most important improvements realized were in the manner the amplifier delivers power. Performing without strain, the RE 280 MKII is always in control of the situation.
Many manufacturers neglect to include electronic protection systems in their tube amps, which means that the life - and indeed the operational safety - of these amplifiers is greatly dependent on factors over which the user has no control, such as the failure of a tube or a short-circuit of the speaker.
OCTAVE equips its power amplifiers with an electronic protection system as a matter of course.
The technical breakthroughs that set the original RE 280 apart were its optimized input gain section and power supply. Indeed, it used a totally new power supply design, featuring double grounding and supply voltage isolation. The optimization of the input stage provided absolute immunity from influences such as the loudspeaker reactive load, together with excellent phase stability for highly accurate push-pull operation and an extension of the usable frequency range from 10 Hz up to 80 kHz. From a sound quality point of view, these enhancements delivered a consistent tonal performance that remains independent of the impedance response and efficiency of the speakers.