Conrad Johnson Premier 350 - 350 Watt (8 Ohms) Reference SS AMP- Superb Electronic Condition

My personal Premier 350. The first owner took ownership in 2005. I believe I am the second.  Listed as an 8/10 due to the scratches on the case and side of cover plate but not the face.  This amp is fresh back from CJ where they've gone through it thoroughly, identifying any issues and updating a cracked power plug and power on light. All is in excellent condition. The face plate is near perfect. The sides are marked from taking it in and out of the rack. This is the premier SS amp that so many reviewers kept as reference for years and it is one of those amps that makes your hair stand up. It can drive most any hard to drive demanding speakers. .  If you need to look up reviews there are plenty to choose from such as Stereo Times, Sound Stage, and Tone Audio sill on the web.
350 watts per channel RMS both channels driven into 8 ohms from 20Hz to 20KHz at no more than 1% total harmonic distortion or intermodulation distortion. Sensitivity: 1.0 V to rated power. Phase: Phase Inverting Frequency response: 20Hz to 20KHz +0, -.25dB Hum and noise: 102 dB below full power output. Input impedance: 100K ohms. Dimensions: 16.375D x 19W x 8H inches Weight: 84 lbs.
FROM CJ's SITE:

Premier 350 Solid State Amplifier

The Premier series of conrad-johnson products are precision music reproduction instruments designed to meet the needs of audio industry professionals and other audiophiles who require near perfection from their reference systems. The Premier 350 is a high-power amplifier with plenty of muscle to control any loudspeaker system, yet capable of capturing the delicate textures and subtle nuances of live music performances.

Hybrid Solid-State Circuit

The Premier 350 benefits from an interesting hybrid of solid-state technologies. The distortion characteristics of an amplifier are dominated by it’s voltage gain stage. We have selected FETs for this application, because, like tubes, and unlike bi-polar transistors, they produce almost no strident odd-order harmonic distortion. The output stage of an amplifier must efficiently couple the high amplitude signal produced by the voltage gain stage to the loudspeaker system to assure the power and control needed to produce a musically accurate response. Bi-polar devices have been specified for the output stages of these amplifiers because they offer about 1/4th the output impedance of a MOSFET, resulting in much better control of the loudspeaker. This is most noticeable in faster, more solid bass response.

Zero Feedback

Negative feedback is an engineering technique used to reduce measured distortion. While feedback does achieve this goal, it also introduces aberrations in the tran-sient response characteristics of the circuit. The Premier 350 uses conrad-johnson’s unique auto-linear gain block for the voltage gain stage, which achieves low distortion with zero loop feedback by exploiting the symmetrical distortion properties of n and p channel FETs.

Solid Power Supplies

Power supply circuits present a parallel signal path to the audio circuits. Ideally this signal path provides ac signals with a zero impedance path to ground. Any deviation from this ideal is reflected in the reproduced audio signal. Thus the power supplies are as important to audio performance as the audio circuits and must be accorded equal attention in design. The Premier 350 features a discrete dc regulators to power the critical voltage gain stage.

Quality Parts

As with all Premier components, the Premier 350 is constructed from the highest quality, carefully selected parts for unrivaled sonic performance and reliability. The circuits employ polypropylene and polystyrene capacitors extensively, except in the main power supply storage, where special high-speed electrolytics are used because of the extremely high capacitance required. The audio circuit and related power supplies utilize precision low inductance laser-trimmed metal foil resistors. The obsession for parts quality extends to the high quality, gold plated input jacks and output connectors – even the internal wiring is chosen on the basis of its sound quality in its specific application.

Thoughtful engineering, specification of the finest available component parts, and painstaking care taken in production make this an audio amplifier without peer in music reproduction.

Specifications:

• Output Power: 350 watts per channel from 20 Hz to 20 KHz at no more than 1.0 % THD or IMD, both channels driven into 8 ohms.
• Frequency response: (at 10 watts): 20 Hz to 20 kHz, +/- .1 dB
• Hum and noise: 104 dB below rated power
• Sensitivity: 1.1 volt rms to rated power
• Input Impedance: 100 KOhms

Mechanical:

• Dimensions: 19W | 8H | 16.375D inches
• Weight: 84 lbs.