Convergent Audio Technology – Philosophy –
CAT’s philosophy is to design our products to neither add to, nor detract from, the music. We never attempt to cover up a design problem with another problem, nor do we try to introduce a supposedly complementary problem to “synergize” with it. Two wrongs do not make a right. Only the eradication of the problem is correct.
The SL1 Renaissance is the product of relentless refinement to the original SL1 introduced in 1985. We have identified and eliminated every electronic artifact. This preamplifier is designed to allow superior systems to reach their fullest potential.
Power Supply –
• External power supply chassis contains the transformer’s magnetic field eliminating it as a source of hum.
• Rectification, initial regulation, and noise filtering are all performed in the EPS thereby delivering pure quiet DC power into the main chassis eliminating the grain and dryness associated with noise intermodulation.
• Slow filament power-up extends tube life greatly.
• Quadruple cascaded audio power supply combines 22 zero-feedback regulators with over 30 energy storage and bypass capacitors for unequaled dynamic life, soundstage precision and musicality.
• Isolation transformer eliminates entry of radio frequency noise through the AC power line yielding greater benefits than any of the expensive add-on power line conditioners without any of their sonic shortcomings.
• Pure vacuum tube circuitry for vibrant and natural music.
• Extraordinarily quiet high gain phono amp accommodates both high and low output cartridges.
• Fastest tube preamplifier, without any of the high frequency circuit-induced edginess which slower preamps frequently substitute for real speed. This speed is maintained even into long runs of cable.
• Lowest open loop distortion of any preamp yields unforced detail and resolution as no other preamp can.
• Low feedback ratio eliminates the aggressiveness of high feedback designs and yet still maintains correct focus.
• Matched output impedance snubs reflections on interconnects quickly, yielding exquisitely lucid midrange and treble.
• Very strong steel chassis with anti-RFI plating ensures hum and RF free operating environment for the circuits.
• Damping material lines both chassis to stop mechanical resonances which would otherwise modulate the electric fields in the preamp.
• Mechanical isolation from floor vibrations provided by high loss viscoelastic feet.
• Exotic low loss circuit board material combines the transparency of hard wiring with the low resonant signature and musicality of a circuit board.
• Amazing new high technology BLACK PATH capacitors used for the critical inter-stage coupling.
• Balance and volume controls are military grade rotary switches with solid silver contacts wired with precision resistors.
• CAT designed MC transformer is the flattest, fastest, cleanest transformer ever made, regardless of price.
• The best sounding precision resistors are used everywhere for the best resolution and minimum unit to unit variability,
• CAT coupling capacitors are made to our specifications and are better than any other audiophile grade capacitor.
• Premium CAT audio wire used throughout.
• Rhodium/Gold jacks for superior connection.