CIAudio D-500 MKII Quick Start Manual

D•500 MKII Class D Monoblock Amplifier
Thank you for purchasing the D•500 MKII Power Amplifiers. These products are proudly
designed, assembled, and tested in the USA. We hope they will provide you with many years of
musical enjoyment.
Please read the entire contents of this manual before making connections to your audio
system.
Design
The D•500 represents the latest in Class D audio amplifier technology.
At the AC Input, we use our smooth-start circuit, which eases the start-up tasks, then to our
XDC•2 circuit to eliminate any DC voltage riding on your AC line. Power is then fed to our
custom multiple-output 922VA power transformer, then rectified by discrete Schottky diode
bridges. Several individual voltages are then filtered and regulated to provide power to various
circuits. The output circuit is unregulated with over 40,000uF of capacitance.
The amplification circuit is a custom full-bridge UcD design with power output of
500 watts into 8 ohms / 800 watts into 4 ohms. This design is 90% efficient at full power and
produces little heat (wasted energy). The small amount of heat generated by the amplifier is
dissipated by the machined aluminum chassis acting as a heat-sink.
This low operating temperature means the internal components aren't subject to the heat
cycles of traditional amplifiers, yielding better reliability, more consistent performance, and
longer life.