Some of you asked for a professional-grade surge protector tear-down when I started taking these apart nearly a year ago. Well, that time has come. I poked a handful of manufacturers back in February to see if any might be interested in sending samples, got a bite from Electronic Systems Protection, received its SA-1810 in April and now we get to go in for a tour. The SA-1810 is ESP/SurgeX’s entry-level offering with the most built-in outlets. If the brand name sounds unfamiliar to you, you may be shocked by its $400 street price and be curious to find out why it is so expensive compared to typical surge suppressors. For people who have no idea who ESP is, the company originally started doing power conditioning for office equipment in 1985 when power quality issues were causing abnormally high service call frequency on the first generations of electronic copiers and other equipment. As for SurgeX, the company started in 1995 by introducing the concept of series-mode protection using non-sacrificial surge clamping components, which are still the two main features it’s known for today. ESP bought SurgeX in 2010, so I’ll be using SurgeX, ESP and ESP/SurgeX interc...