The Neutrik XLR input connector is the gold plated type, as this is the best type of long-term input connector to plug in and leave there for years. Neutrik also makes XLR’s with other contact materials, but these are intended for connectors that you connect and disconnect many times, thus often making a new oxide-free contact. The WBT binding post is unique by having a protection ring, which does not move, as you turn the terminal tighter. It also offers a hole for wires or pins, which can be deformed by reasonable force. WBT also make a matching spade with small high pressure contact points. The WBT’s are gold plated and made for very high currents. (200A). Finally, the 4mm pin hole is not in the moving parts, it is in the main body, reducing the number of contact surfaces compared to other terminals. The gain level is a switch in the ground side of the attenuator, so that a bad connection will be very noticeable, as the level will no longer be reduced! These are the only detachable audio connectors in a GamuT D200. All other connections are solder or plastic deformation types. For the large MOSFETs, we had a problem. Their contacts are made for cheap round lugs. Flat lugs would not make a good audio connection, so we use the round wire against the flat surface method. Here, the round wire is deformed, and the connection is made mechanically stable by using a washer with many teeth, hence applying the pressure inwards. In development testing, we have tried to pull the wire loose. However, the wire was so well connected that we pulled the MOSFET apart instead! The large power supply capacitors are connected in the same way with round wires.