Power Amplifier

Allow us to introduce you to our signature tour-de-force instrument, the Marian Research monoblock power amplifier. The amplifier is unique in that all the electron tubes are auto-biased (requiring no user adjustment). Marian Research’s proprietary output stage provides very wide bandwidth plus an optimal balance of square wave performance and acceptably low output impedance. This enables extraordinary transparency, detail, and three-dimensional realism in all kinds of music. The amplifier is housed on a chassis featuring beautiful carpentry and top quality machined metalwork.

The amplifier can be ordered in three different metal finishes (anodized black, anodized silver & electroplated bright nickel) and three different woods (oak, maple & walnut). To see photographs of the nine different combinations click here . Note: if you have an idea for a special custom design of your own, please contact us. As an example, we recently built a pair of amplifiers for a customer who requested polished ebony and silver. The result was stunning!

Here are the amplifier technical specifications:

Power Output: Conservatively rated at 300 watts into 4 Ohms and 190 watts into 8 Ohms (10Hz - 100kHz). Frequency Response at 1 W into 4 or 8 Ohms: 5 Hz - 250 kHz (-3dB points). Input Sensitivity: 1.3V rms for rated output. Gain: 30.2dB. Input Impedance  balanced & unbalanced: 40k Ohms. Overall Negative Feedback:  11dB. Slew Rate: 60V per microsecond. Hum & Noise: 1mV rms (–92dB below rated output). Power Supply Energy Storage: 425 Joules. Power Requirements: 110Vac or 220Vac, 350 Watts (at idle), 565 Watts (at rated output). Tubes Required: Eight of type KT88 (or 6550). Two of type 12AU7 and one of type ECC99. Dimensions: 26.5” long by 15.5” wide by  7.5” high. Weight: 55 pounds each (110 pounds the pair).

Price: $19,995 per pair