As we learnt from my review of the 1MHz Linnenberg Allegro monos: "...creating circuits with unrivalled speed and response time is, amongst other things, a matter of physical closeness of electronic parts. The higher the frequency, the more important it is to reduce every millimeter of board trace." From the implied tight packing of parts, we wouldn't expect the circuit board of the Telos 590 to be anywhere near as sizeable as the casework might otherwise contain. And it's not. It's not that kind of sprawling massively stacked design. But still there are two power transformers to run the power supply dual mono. Looking more closely we see four power transistors per channel - the same as the
Job 225. This explains why power nowhere near doubles into 4Ω. Unlike our $6'500 Pass Labs XA-30.8 with its 20 power transistors per side conservatively rated for just 30wpc in pure class A, Goldmund prefer the minimum number of transistors to achieve their nominal rating at maximum speed. Device location in the middle of the chassis and mounted to the bottom right below the PCB makes for a far shorter circuit than bolting each channel's Mosfets to an opposing heat sink. Their fins simply dissipate whatever thermal action hits them from the thick bottom plate. Hence nothing else bolts to the heat sinks directly, just the chassis panels.
