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| The Premier Fifteen phono equalization preamplifier provides the additional gain and equalization required for phono playback through a standard line-level preamplifier. Designed to precisely track the prescribed RIAA equalization curve, the Premier Fifteen assures absolute tonal accuracy High gain circuits, carefully engineered for low noise, accommodate a wide range of moving coil and moving magnet cartridges.
The audio circuits of the Premier Fifteen are single-ended triode amplifiers (two per channel in the Premier Fifteen), with the final amplifier stage direct coupled to a triode cathode follower. The low output impedance of the cathode follower permits the use of long, highly capacitive interconnect cables without attenuation of high frequency information and without softening of transients. The circuits are zero-feedback design, to eliminate the temporal inaccuracies that negative feedback introduces. Careful implementation of these fundamentally simple circuits results in extremely wide bandwidth, and low distortion, without resorting to negative feedback. Power supply circuits present a parallel signal path to the audio circuits. Ideally this signal path is merely a zero impedance path to ground. Any deviation from this ideal is fully reflected in the audio circuits. Thus the power supplies are as important to audio performance as the audio circuits and must be accorded equal attention in design. In the Premier Fifteen, each stage has its own discrete regulated DC power supply. These power supplies have been carefully designed for minimum impedance, even at the highest audio frequencies, to prevent the power supplies from degrading music reproduction. The full potential of any circuit design can only be realized if executed with the highest quality parts. The audio circuits of the Premier Fifteen use only conrad-johnson's proprietary polystyrene capacitors. In the power supplies, all capacitors are polypropylene and polystyrene - there are no electrolytic capacitors anywhere in the audio circuits or their dc power supplies. The audio circuits and related power supplies both use high-precision laser trimmed metal-foil resistors, designed for ultra-low inductance. All parts in the Premier Fifteen's RIAA compensation network are 1% tolerance, to assure precise tracking of the RIAA curve. Internal signal path wiring is exclusively of silver wire. Input and output connectors are gold-plated, machined oxygen free copper. All switching do functions are handled by sealed relays, featuring gold-plated silver contacts. Thoughtful engineering, specification of the finest available component parts, and painstaking care taken in production make the Premier Fifteen an audio preamplifier system without peer in music reproduction. We invite you to arrange an audition with your conrad-johnson dealer to confirm for yourself the extraordinary musical performance of these products. |
Premier 15 Vacuum-Tube Phono Preamplifier Gain: 53 dB
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| All conrad-johnson products are carefully hand assembled and each is thoroughly tested to assure conformity to our exacting performance standards Our confidence in these components is reflected in our three year limited warranty covering labor and parts. Service is a top priority at conrad-johnson. In the event that a product does require service, it will be handled promptly and efficiently. |
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conrad-johnson design, inc. 2733 Merrilee Drive Fairfax, VA 22031 phone: 703-698-8581, fax: 703-560-5360 |