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Description

Features

  • Independent power supplies for each channel for true dual-monaural operation
  • Massive encapsulated 1.4 kVA toroid power transformer for each channel
  • 97,600 uF power supply capacitance for each channel
  • Multiple polystyrene film bypass capacitors in power supply
  • Direct coupled design uses no inductors or capacitors in the signal path
  • DC servo direct-coupled audio circuits with 0.5 Hz rolloff
  • Output transistors direct-coupled to speakers without LRC networks
  • Cascode Class A input stages with matched J-FET pairs
  • Hand-picked complementary MOSFET transistors in high voltage driver stage
  • High-bias Class A/AB operation provides 15 Watts of pure Class A operation
  • 8 complementary pairs of 15 ampere 60 MHz output transistors per channel
  • High-quality Neutrik XLR jacks for balanced inputs
  • Two sets of gold-plated metal structure RCA input jacks for balanced operation
  • Two sets of gold-plated 5-way binding posts facilitates bi-wiring
  • Multiple protection circuits, temperature sensors and silver-cadmium relay protection
  • Glass epoxy circuit boards, double-sided for precision
  • Two hand-made audiophile-grade AC power cords-separate for each channel

Specifications

  • Continuous Power Output - Stereo:
    350 watts RMS x 2, 20 Hz - 20 kHz, 8 Ω, both channels driven;
    500 watts RMS x 2, 20 Hz - 20 kHz, 4 Ω, both channels driven
  • Current Capacity:
    120 amperes peak per channel
  • Slew Rate:
    > 200 V/µsecond
  • Power Bandwith:
    2 Hz - 150 kHz, +0/-3 dB at 1 watt
  • Total Harmonic Distortion:
    <0.025% at full power; < 0.01% at typical levels
  • IM Distortion:
    <0.03%
  • TIM:
    unmeasureable Dynamic Headroom: > 1.5 dB
  • lnterchannel Crosstalk:
    > 95 dB at 1 kHz, > 80 dB at 20 kHz
  • Input Sensitivity:
    1 V for 28.28 V; 2 V for full output
  • Input Impedance:
    100 k Ω
  • S/N Ratio:
    > 120 dB, full power
  • Damping Factor:
    > 1000 at 20 Hz
  • Power Consumption:
    1200 watts
  • Dimensions:
    w 19" x h 7" x d 22", h 7 5/8" with feet
  • Net Weight:
    85 lb.

Support and Downloads

HCA-3500 Manual

Vintage HCA-3500

Features

  • Independent power supplies for each channel for true dual-monaural operation
  • Massive encapsulated 1.4 kVA toroid power transformer for each channel
  • 97,600 uF power supply capacitance for each channel
  • Multiple polystyrene film bypass capacitors in power supply
  • Direct coupled design uses no inductors or capacitors in the signal path
  • DC servo direct-coupled audio circuits with 0.5 Hz rolloff
  • Output transistors direct-coupled to speakers without LRC networks
  • Cascode Class A input stages with matched J-FET pairs
  • Hand-picked complementary MOSFET transistors in high voltage driver stage
  • High-bias Class A/AB operation provides 15 Watts of pure Class A operation
  • 8 complementary pairs of 15 ampere 60 MHz output transistors per channel
  • High-quality Neutrik XLR jacks for balanced inputs
  • Two sets of gold-plated metal structure RCA input jacks for balanced operation
  • Two sets of gold-plated 5-way binding posts facilitates bi-wiring
  • Multiple protection circuits, temperature sensors and silver-cadmium relay protection
  • Glass epoxy circuit boards, double-sided for precision
  • Two hand-made audiophile-grade AC power cords-separate for each channel

Specifications

  • Continuous Power Output - Stereo:
    350 watts RMS x 2, 20 Hz - 20 kHz, 8 Ω, both channels driven;
    500 watts RMS x 2, 20 Hz - 20 kHz, 4 Ω, both channels driven
  • Current Capacity:
    120 amperes peak per channel
  • Slew Rate:
    > 200 V/µsecond
  • Power Bandwith:
    2 Hz - 150 kHz, +0/-3 dB at 1 watt
  • Total Harmonic Distortion:
    <0.025% at full power; < 0.01% at typical levels
  • IM Distortion:
    <0.03%
  • TIM:
    unmeasureable Dynamic Headroom: > 1.5 dB
  • lnterchannel Crosstalk:
    > 95 dB at 1 kHz, > 80 dB at 20 kHz
  • Input Sensitivity:
    1 V for 28.28 V; 2 V for full output
  • Input Impedance:
    100 k Ω
  • S/N Ratio:
    > 120 dB, full power
  • Damping Factor:
    > 1000 at 20 Hz
  • Power Consumption:
    1200 watts
  • Dimensions:
    w 19" x h 7" x d 22", h 7 5/8" with feet
  • Net Weight:
    85 lb.

Support and Downloads

HCA-3500 Manual

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