Premier One and One-b Vacuum Tube Power Amplifier

Introduced December 1981, Premier One-b September 1986

The Premier One was the first of a line of state-of-the-art contenders to carry the conrad-johnson Premier badge. Uncommonly powerful for a tube amplifier at 200 watts per channel, the Premier One was identified by one leading audiophile publication as the best sounding power amplifier ever made to that time.

An enormous power supply with massive computer-grade electrolytic capacitance totaling 4000 micro-farads at more than 500 volts delivered startling deep and controlled bass response not achieved by any other vacuum tube power amp. Ultralinear operation of the 6550 output stage offered an excellent combination of high power and low distortion. Complex loads were a breeze and hard to handle electrostatics speakers presented no problem to the Premier One.

Despite its brute power, the Premier One remained very delicate at the highest frequencies yielding extended high frequency response uncommon in vacuum tube designs and with a remarkably three dimensional soundstage. Premier Ones are sought after and highly prized by both collectors and audiophiles even today.


4, 8, 16 ohm speaker taps (screw type), one pair of inputs, two plate fuses, power switch, built in bias indicators.


Selector, Tape 1/Tape 2, Source/Monitor, Balance, Volume, & Power.

Premier 1
V1 & V2: 5751
V3-V6: 6FQ7/6CG7
V7 V18: 6550
Replacement Tube Set RTPR1

Premier 1 b
V1 & V2: 5751
V3-V6: 6FQ7/6CG7
V7 V18: EL34
Replacement Tube Set RTPR1b

Click above for technical info on this product or to purchase a replacement tube kit.


Power: 200 watts per channel into 4, 8, or 16ohms with no more than 1% THD and IM Distortion, both channels driven from 30 Hz to 15 kHz
Response: 20Hz to 20kHz, +0, -.5dB
Input Sensitivity: 1.0 volts to full power
Hum & Noise: 100dB below full power
Input Impedance: 100K ohms
Dimensions: 19" x 10 _" x 22"
Weight: 135 lbs.