- Compact size - Mains Spike Protection (SMP), Over Voltage Protection (EVS) - Line Filter (LIFT) - 10 Amps capacity - Line Outputs: 2 For over 35 years Furman has been one of the most trusted manufacturers of AC/Line Filters, Voltage Regulators, Isolating Transformers and Switch-on Sequencers. Furman's products provide today's modern electrical equipment with the protection that is all too often lacking. Equipment that could otherwise easily be knocked out or subjected to completely unnecessary wear and tear.