Power amps into surge protector/Conditioner or DIRECT to wall? Final verdict?

I just did a little bit of research sadono and I believe you have you facts wrong.

• SurgeX sued Furman for trade-mark infringement and false advertising. They did not sue them for patent infringement. They cannot legally use a term/logo like SMP (Series Mode Protection) which appears to be a trademarked term and false advertising likely because it implies a relationship to SurgeX, but I am guessing on that last part.
  

• The SurgeX site has a reference to their two original patents. They are from the 80's. 
  
• https://patentimages.storage.googleapis.com/12/92/3b/86aee532396c8d/US4870534.pdf   
  
• https://patentimages.storage.googleapis.com/d5/03/32/db000be262ff24/US4870528.pdf
  

Any protection from those would be long over. I looked on USPTO (patent database) and there are new ones, but they seem to add features or include a transformer in the circuit.

sadono,  Can you please describe what "real" series mode surge protection is?

The picture of the Furman unit here: https://www.furmanpower.com/series-multi-stage-protection-smp on the left (from the large inductor and over) seems to match what is described/drawn in the SurgeX patents I linked to from the 80’s. On the right appears to be some traditional MOVs, and probably some voltage detection to turn on/off the relay on the right side. The additional use of the MOVs is a good thing and probably makes the circuit on the left perform better.

sadono91 posts11-05-2019 11:18pm
This is not true! The part of SMP that is series mode surge technology is always on. However, this section is more limited in its capabilities with let-through voltages, compared to real series mode surge technology. The MOVs and EVS (Extreme Voltage Shutdown), other parts that makeup SMP (Series MULTI-STAGE Protection), have a delay before kicking in.

Lowryder

the company is Core Power Technologies, but yes

@tweak1 , ok. There's Core Power and EquiCore. Both use balanced power I believe.

lowrider
same, same
Underwood HIFi bought the company about 6 months ago