To prevent fire or shock hazard, do not expose the unit to rain or moisture. To avoid electrical shock, do not open the enclosure. Refer servicing to qualified personnel only.
To prevent electric shock, use a 3 prong, grounded power cable.
Any change or modifications not expressly approved in the manual could void your warranty.
Do not connect the output of the HCA-2 to ground. The output of the HCA-2 is a balanced output and should not be grounded.
Do not operate the amplifier with no load (ie, without speakers attached)
Safety Instructions
Read the operating instructions provided with the HCA-2.
Retain the operating instructions for later use and reference.
Unplug the HCA-2 from the wall outlet before changing the fuse or performing any cleaning or service.
Do not operate the HCA-2 near water. Avoid placement near a water reservoir or excessive moisture.
When replacement parts are required, be sure they are specified by the manufacturer to have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards.
Do not operate with faulty or frayed power cables.
Congratulations! You have just taken a step into an incredible new dimension of the audio world. The Hybrid Class A stereo amplifier, or HCA-2, represents a revolution in the innovation and design of amplifier technology.
Analog-only amplifier circuits have been refined over and over for the last 100 years to a point where we hardly expect to gain any further significant achievements. Attempts have been made at pure digital designs only to yield results that certainly leave much more to be desired.
The HCA-2 is an audiophile’s first look at these two concepts being blended into one: a hybrid amplifier with a fully balanced, Class A input stage and a truly state-of-the-art digital output section known as SDAT™.
Design Overview
The HCA-2 is a stereo (two-channel) amplifier rated at 150 watts per channel into 8 ohms. It is comprised of two main stages: the input stage and the output stage.
The input stage is the heart and soul of the HCA-2’s sound. A fully balanced, Class A input stage that can be fed by either single-ended RCA connectors or the balanced XLR type.
The output stage of the HCA-2 is our unique Super Digital Amplification Technology SDAT™ circuitry that provides an absolutely linear response into any loudspeaker load. SDAT circuitry is not load sensitive which assures that the frequency response will not change regardless of the loudspeaker load.
The HCA-2 represents a state of the art power amplifier that is affordable, efficient, and can be used to glorify the beauty and passion of recorded music in ones home. We trust you will enjoy the HCA-2 for years.