Coda Stereo Amplifier 15.5 - Manual (Page 12)

II. Material Quality
The amplifier’s chassis is made from machined aluminum. All exterior metal parts are
anodized or powder coated for durability.
Printed circuit boards are fiberglass epoxy with gold plating over a tin/nickel barrier.
The gold layer will not corrode, while the barrier layer prevents the gold from migrating
to the lower copper layer.
All resistors are precision metal film; 1% tolerance for 1/4-watt and 5% tolerance for
1-watt.
Capacitors have been eliminated wherever possible. No electrolytic capacitors are
used except in the power supply, where several high-capacitance electrolytics
provide outstanding filtering of the supply output.
All semiconductor devices are of very high grade. Voltage gain is accomplished with
an extremely high-quality, matched dual FET, chosen for it’s exceptionally low noise
characteristics.
All audio input and output connector contacts are gold-plated, and XLR receptacles
are manufactured by Neutrik of Switzerland. Wire is used as little as possible in the
signal path - only to connect the RCA jacks and speaker terminals to the circuit board
- and what is used is 141-strand silver-plated copper with silicone insulation.
DESIGN PHILOSOPHY 11