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  5. Operating Instructions Manual

PS Audio Classis 250 Operating Instructions Manual

Summary of Classis 250

  • Page 1

    Table of contents 1...What’s in the box 2...Quick start guide 3...Design overview 3...Input gain stage 3...Internal power plant 4...X1 output current stage 4...Main power supply 4...Operation 4...Front panel: power 4...Front panel: display 5...Back panel: inputs 5...Back panel: outputs 6... Back pan...

  • Page 2

    Quick start guide 1. Turn off your pre-amplifier or any other piece of equipment to which the c250 will be connected. 2. Ensure that you have a proper pair of audio interconnects for the input signal and a pair of speaker cables to connect the c250 to your speakers. 3. Unpack the c250 and place it o...

  • Page 3

    Design overview based on the classic lines of the p600 power plant, this is built in true ‘battleship’ fashion. This 95 pound audio sculpture is simply magnificent in its build quality and attention to detail. The side heat sinks are on hinges and fold down to expose the c250’s circuitry for easier ...

  • Page 4

    C250 amplifier, producing a much more rich and open sound. Having a power plant built into the clas- sic 250 to regenerate a clean ac signal for the input gain stage is one of the factors that sets this amplifier apart. It is worth noting, however, that the power plant is only regulating the input s...

  • Page 5

    The center line, labeled, “%,” presents the same information as above, but displayed as a percentage. Therefore, a 120 volt input should read 100%. The bottom line, labeled “energy storage,” indicates the accepted voltage range to achieve normal operation. During loud passages, or if your ac line te...

  • Page 6

    Stereo output: the positive terminals are indicated by a red connector and (+). The negative terminals are indicated by a black connector and (-). Connect the left positive (red) of the c250 to the positive (red or +) of your left speaker cable and connect the left negative (black) of the c250 to th...

  • Page 7

    The c250 is internally equipped with a ps audio power plant. This circuit was spe- cifically tailored for the c250 input stage. The primary function of this power plant is to regulate and optimize the power line signal for the input stage, however you may still choose to plug the c250 into a ps audi...

  • Page 8

    Useful tips speaker placement speaker placement, particularly in a two- channel setup, can be a critical element in system performance. Once you have installed the c250 in your system, we would encourage you to re-evaluate the loudspeaker’s positioning with respect to toe-in, distance from the rear ...