The complete power amp is consequently built in a double mono design. Due to its dimensions and weight, the power supply is built into a separate cabinet. The amp itself comes in a second cabinet of the same size as the power supply. A pair of specially designed cables come with the LaScala to connect both units. Both cables are "foolproof" terminated with connectors, which allow the connection of the power supply and the amp in only one possible manner. The cable based on four pins delivers the voltage for the power transistors, while the cable with the seven pins delivers the high tension for the tubes in the voltage stage, as well as the power for the BIAS Control Unit. The ON/OFF-switch is well hidden under the front edge of the power supply cabinet. At the front of the amplifier cabinet there is a display, and two switches left and right of that display. Both switches allow you to enter the set-up menu of the LaScala, where it is possible to select from different modes show different parameters like temperature, RPM of the fans, BIAS setting etc. at the display.

My recommendation is to leave the factory settings as they are. On the backside of the amp, we find the balanced XLR input connector for both channels, as well as the connectors for the speakers. In between those connectors there is a switch marked "4 Ohm" and "8 Ohm." Which position is "right" is mainly defined by the impedance of the connected speakers. But the final decision with your own speakers should be taken by listening. Both switches can be used during operation.

For the listening test, I connected the LaScala with my preamp, made by Erno Borbely. As a source, I used my DirectStream DAC by PS Audio. As the LaScala comes with XLR connectors only, I configured an RCA/XLR adapter. At first, I feared to create noise based on a potential ground loop. But the connection worked perfect without producing any kind of hum.