Can these fit under a peddle board like
bleujazz3 ?
Well, no. However, I wasn't recommending these for their small height/depth and ability to fit beneath a pedalboard. I was responding to the OP request for recommendations of surge protecting his FM9.
Furman products use sacrificial and wearing MOV components as basis for their surge protection. The inherent problem with MOV-based surge protectors is that the MOVs physically degrade upon experiencing surges and overvoltage transients. Not only do they wear, but their failure will be unforeseen and unpredictable to the consumer. Worse, a MOV-based surge protector may look just fine, with all diagnostic LEDs showing "normal"...but upon the next surge, completely fail to protect the connected electronic equipment. The unpredictable, finite lifetime of MOV-based surge protectors is a deal breaker, as far as I am concerned, if you are looking to protect sensitive electronic equipment valued at thousands of dollars.
If you have dodgy power, or play in venues/areas that may have dodgy power, and you are looking for robust, reliable and dependable surge protection, than I strongly recommend Zero Surge. Besides Zero Surge, there is also SurgeX, as well as Brick Wall, which use similar design/topology as Zero Surge -- i.e. Series Mode Protection with inductor and capacitors, shunting , non-sacrificial (no MOVs).
https://www.ametekesp.com/surgex/standalone/standalone-120-208v
https://www.brickwall.com/
By the way, I am in no way knocking Furman. I am sure the Furman AR215A would be fine for a typical pedalboard...and decent surge protection (even if it is MOV-based) is better than no surge protection. My recommendation for a Zero Surge type surge protection solution is geared more towards the consistent, long-term surge protection of expensive electronics of $1,000 value or more. Due to their size and weight, they are probably more suitable for a fixed location at your home/studio, versus something you would be travelling to gigs with.
