AUDIOPHONICS HPA-S600NCX Power Amplifier Class D NCore NCx500 2x600W 4 Ohm - reviews - There are 4 reviews.

Great amp, Great company
Needed more headroom for my Arendal 1723 monitor s speakers. Tried Fosi ZA3 300 watts per channel using monoblocs and sound improved significantly. Decided to jump to 600 watts per channel and landed on your website. Now I’m where I need to be. I was concerned about ordering from USA but pleasantly surprised when my order arrived within 3 days! Shipping was even faster than ordering in US. Build quality is fantastic and sound keeps improving with break in. This is the last amp you will need if you’re looking for more power to drive speakers with lower sensitivity. All the nuances in the recording can now be heard at volume levels that are not ear splitting. Thanks for a great product and great buying experience..

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Really the precision, control and power is out of this world. The only problem I have is that the 12V trigger in/outs accept only mono 3.5 jacks, if you try to use stereo jack it creates ground loop problems. This was not a problem with the nc502mp aps that I have.

a real beast
Hypex NCX500 doesn't need any presentation about its quality....
this amplifier is really well built more than what's visible from site images. Bindings are really well done.
The only note is about OPA: perhaps a couple of OPA1612 would like to be a fantastic upgrade.
Super suggested buy!!!

Fantastic!
This power amp is just absolutely fantastic! The build quality is much nicer in real life than what the pictures can express! I picked this NCx500 based version over the Purifi 1ET400A, because the Hypex module is more or less exactly the same module, but improved on. The sound quality is amazing, the power and control is almost unimaginable! I can highly recommend!