Could you explain why the other post for the Apollon was no good is it because it had one psu what would happen if I went with that how would that unit work in other amps if it has this problem. just trying to learn as I go. Thanks
The issue is the design of the 3K power supply and how it would interact with half bridge amp modules.
The 3K power supply, according to Hypex:
"The SMPS3K is intended to power our range of high power amplifier modules, such as UcD2K and NC2K. As a
result, this SMPS product does not feature the 2-quadrant operation as most of our other SMPS products do.
Therefore, they are unable to handle large reverse currents generated by half-bridge amplifiers operated at
low frequencies. For this reason, it is not advisable to use this SMPS to power half bridge amplifiers
like our UcD700 and UcD400 modules when used in the frequency range below 100Hz. A workaround for this could be
using the UcD700/UcD400 in bridge mode, or reversing phase for half of the modules."
The UcD400/UcD700/NC500/NC1200, NCx500 are half bridge amplifiers. If the number of amp channels is even, one can simply invert the output of one amp model to get around the supply pumping. You can not do this with an odd number of amp channels since there would be an imbalance.