MRE 220

Product duration: 2012 to 2023


Available Colors: Silver or Black

The MRE 220 mono power amplifiers have been completely redeveloped. These power amplifiers are based on the MRE 130 mono power amplifiers and the award-winning RE 290 stereo power amplifier. The RE 290 was developed and optimized specifically for the KT 120 power tube. It was awarded the Golden Sound Award 2011 in Japan by Stereo Sound and is used as a reference power amplifier in many editorial offices. The MRE 220, Octave’s second amplifier designed for the KT 120, achieves a performance that was previously deemed impossible with tube amplifiers with the KT 120 and its new Power Supply and Output-Transformer-Section designs. The output power climbs up to 220 W RMS into 4 ohms with 300 W Impulse Power. Just to mention a few key specs: The Power bandwidth at full power ranges from 20 Hz up to 70 kHz. The amplifier is stable down to 2.5 ohms speaker impedance and the S/N ratio is higher than -116 dB. The input section can be optionally equipped with a Balanced Input Transformer. Such an Input Transformer eliminates effective ground loops and high frequency noise on the ground line which can affect the sound.

General facts

Basic model MRE 220 (pair)
Design Silver or Black
Tube complement Per power amplifier: 4 x KT 88-S4A carbon, optionally 4 x KT 150 TS or 4 x KT 120 TS
Connections Inputs: 1 x RCA, 1 x XLR; Output: Speaker output suitable for banana plugs and cable lugs
Dimensions 488 x 229 x 412 mm (W x H x D)
Weight 29.8 kg


Eco mode Eco mode
Power selection Adaptation to alternative power tubes
Bias control Quiescent current display and setting
Protection System Soft start; Protection circuit for amplifier and power tubes
Inputs 1 x RCA + 1 x XLR switchable


Output power at 4 ohms High: 200 W (RMS) / Low: 140 W (RMS)
Frequency response 20 Hz - 70 kHz / -3 dB at full power
Input resistance 50 kOhm RCA / 25 kOhm XLR
Signal-to-noise ratio -116 dB (100 µV 150 Hz - 15 kHz)
Amplification +29.5 dB RCA
Input sensitivity 1 V RCA; 2 x 0.5 V XLR

Add On Modules

Review 07/2016

"These amps can simply do everything, and I am convinced the deluge of international awards for their previous flagships will only increase for these new models. They’re dream, and I have rarely heard such good music, this applying to everything from Adele via Mozart to ZZ Top, and without reservations. I can’t think of a higher compliment."

Tom Frantzen STEREO - July 2016

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