Conrad-Johnson LP125M Mono Block Amplifiers
 Consistent with Conrad-Johnson's design philosophy that circuits should be kept as simple as possible, these amplifiers work their magic with a minimum of vacuum tubes (six in the mono LP125M). A composite triode input stage is direct coupled to a cathode-coupled phase inverter. The output stage is comprised of 6550s operated in ultra-linear configuration (two pair for the LP125M) for an optimal combination of high power and low distortion. Limited negative feedback is applied to the circuit to reduce distortion and provide a sufficiently high damping factor to control most real-world speaker systems. Discrete dc power supply regulators are provided for the input and inverter stages, in order to isolate each stage from the output signal. As with all Conrad-Johnson tube amplifiers, these amplifiers require no complicated adjustments or specialized equipment to maintain. To assure continued peak performance, the owner need only make a simple bias adjustment when new tubes are installed. Built in LED bias indicators allow the user to make this adjustment using only the supplied screwdriver. Component parts quality is a signature strength of any Conrad-Johnson product. The audio circuit and related power supplies feature precision metal film resistors and high-performance polypropylene capacitors. There are no electrolytic capacitors in the audio circuit or in the related power supplies. Proprietary wide-bandwidth output transformers contribute to excellent high frequency performance. Even the input/output connectors and internal wiring have been carefully selected for optimal sonic performance. For those who do require more power, the LP125M mono-block delivers a solid 125 watts. Along with the tonal integrity and faithfulness to the music that are embodied in these amplifiers, their ease of use, low maintenance costs, and reliability will be a revelation for those who have only experienced "entry-level" tube gear. We invite you to visit your conrad-johnson dealer to audition an LP125M and rekindle your passion for enjoying great music in your home. Power: LP125M - 125 watts from 30 Hz to 15 KHz at no more than 1.0 % THD when driven into 4 ohms (also available connected for 8 or 16 ohm loads) Sensitivity: LP125M - 0.9V to rated power Frequency Response: (at 10 watts): 20 Hz to 20 kHz, +/- .25 dB Hum and Noise: 102 dB below rated power Input Impedance: 100 kOhms Tube Complement: LP125M - 1 x M8080, 1 x 6922, 4 x 6550 Dimensions: 16" D x 19" W x 6.38" H Weight: LP125M - 47 lbs. |
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| Conrad-Johnson ET250S Stereo Amplifier | Conrad-Johnson LP66S Stereo Amplifier |
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