CAT Pre-Amplifiers

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SL1 Renaissance Black Path Edition

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 zerofeedback
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.
Circuitry
 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.
Chassis
 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.
Quality
 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.
Convenience
 Front panel muting switch.
 Internal high/low line stage gain switch allows gain
optimization for all systems.
 Automatic mute at turn on and turn off.
 Record/Normal front panel taping switch
 Extra set of main output jacks for A/V and special setups.
 Load jack allows changing MC cartridge loading while
listening to music.
 Optional balanced inputs and outputs
Specifications
Gain (@1kHz): Line 25.8 dB (“high”) / 15.2 dB (“low”),
Phono 47dB MM / 58 dB MC
Gain Tracking: Line .05dB, Phono .05dB
Frequency Response: Line 0.1Hz to 800kHz+0, -3dB
Phono RIAA +/- 0.1dB 20Hz to 20kHz (MC & MM)
Harmonic Distortion (@ 1 volt): Line less than .0005%
Phono less than .001%
Slew Rate: Line 15 volts/microsec, Phono 10 volts/microsec
Maximum Output (@1kHz): Line & phono 50 volts rms
Input Overload: Line 1000 volts rms
Phono MM 250 mv rms at 1kHz, MC 70 mv rms
Noise: Line High 98 dBA, Low 109 dBA below2 volt output
Phono MM 97 dBA below 10 mv input, MC 107 dBA
Separation: Line greater than 90 dB
Phono greater than 90 dB
Input Impedance: Line 50 kohms, 20pf,
MM Phono 47.5 kohms, 180 pf
MC Phono 4K ohms (User adjustable)
Output Impedance: Line 100 ohms, Phono 50 ohms
Maximum Load: Line under 4000 pf, over 5000 ohms
Phono under 4000 pf, over 10,000 ohms
Dimensions: Main Chassis – 19.0” X 5.24” X 12.2”
Power Supply – 12,2” X 4.0” X 6.0”
Weight: Net 64 lbs., Ship 70 lbs.
Power Requirements: 120v, 60Hz, 80 watts (export version
available)

CAT logo

SL1 Legend Black Path Edition

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.
 Slow filament power-up extends tube life greatly.
 Quadruple cascaded audio power supply combines 22 zerofeedback
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.
Circuitry
 Pure 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 which must be heard to be believed.
 Low feedback ratios eliminate the aggressiveness of high
feedback designs and yet still maintain correct focus.
 Matched output impedance snubs reflections on interconnects
quickly, yielding exquisitely lucid midrange and treble.
Chassis
 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.
 Constrained layer damped top and bottom covers.
 Mechanical isolation from floor vibrations provided by high
loss viscoelastic feet.
Quality
 Exotic super low loss circuit board material combines the
transparency of hard wiring with the low resonant signature
and musicality of a circuit board.
 Amazing new technology BLACK PATH capacitors used for
the highly critical inter-stage coupling.
 Legendary Black Gate power supply caps.
 46 position stereo volume control is a military grade rotary
switch with solid silver contacts wired with precision resistors.
Only one resistor is in the signal path.
 CAT designed MC transformer is the flattest, fastest, cleanest
transformer ever made, regardless of price.
 The best sounding precision resistors are used everywhere
 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.
Convenience
 Front panel muting switch.
 Internal high/low line stage gain switch allows gain
optimization for all systems.
 Automatic mute at turn on and turn off.
 Record/Normal front panel taping switch
 Extra set of main output jacks for A/V and special setups.
 Load jack allows changing MC loading while listening.
 Optional balanced inputs and outputs.
Specifications
Gain (@1kHz): Line 25.8 dB (“high”) / 15.2 dB (“low”),
Phono 47dB MM / 58 dB MC (low) / 64dB MC (high)
Gain Tracking: Line .05dB, Phono .05dB
Frequency Response: Line 0.1Hz to 1.5 MHz+0, -3dB
Phono RIAA +/- 0.05dB 20Hz to 20kHz (MC & MM)
Harmonic Distortion (@ 1 volt): Line less than .0001%
Phono less than .0005%
Slew Rate: Line 15 volts/microsec, Phono 10 volts/microsec
Maximum Output (@1kHz): Line & phono 50 volts rms
Input Overload: Line 1000 volts rms
Phono MM 250 mv rms at 1kHz, MC 70 mv rms
Noise: Line High 98 dBA, Low 109 dBA below2 volt output
Phono MM 99 dBA below 10 mv input
MC(low) 110 dBA, MC high 116 dbA below 10mv input
Separation: Line greater than 100 dB
Phono greater than 100 dB
Input Impedance: Line 50 kohms, 20pf
Phono 47.5 kohms, 180 pf (user adjustable)
MC low 8 ,000 ohms, MC high 2,000 ohms
Output Impedance: Line 100 ohms, Phono 50 ohms
Maximum Load: Line under 4000 pf, over 5000 ohms
Phono under 4000 pf, over 10,000 ohms
Dimensions: Main Chassis – 19.0” X 5.24” X 12.2”
Power Supply – 12,2” X 4.0” X 6.0”
Weight: Net 80 lbs., Ship 85 lbs.
Power Requirements: 120v, 60Hz, 80 watts (export version available)