Check the 18vdc regulators of the NAD C 352
The NAD 352 looks like 320BEEE with the cover removed. I repaired the 18vdc regulator in my 320 which opened a fusable resistor. This NAD worked for thousands of hours but it was running hot because the mainboard blocks the air convection from the tiny grill in the bottom panel. The 352 has grills in the cover sides which might lower the average temperature but will do little to cool the pcb components because heat rises. The design does not have good structure since the 18v transistors are in the middle of the mainboard on pcb mounted plates which are starved for cool air flow.
The NAD 352 looks like 320BEEE with the cover removed. I repaired the 18vdc regulator in my 320 which opened a fusable resistor. This NAD worked for thousands of hours but it was running hot because the mainboard blocks the air convection from the tiny grill in the bottom panel. The 352 has grills in the cover sides which might lower the average temperature but will do little to cool the pcb components because heat rises. The design does not have good structure since the 18v transistors are in the middle of the mainboard on pcb mounted plates which are starved for cool air flow.