JS-4 Triple-Regulated Power Supply

After more than 2 years of development and testing, the JS-4—UpTone's new triple-regulated, dual-output, 100% isolated, 2.1A/4A linear power supply is in production. Beginning in June 2025 we began building and delivering 30 units per month–and they keep selling out in advance very quickly. The performance and success of JS-4 has been overwhelming and each month's production generally sells out a few weeks in advance. We are presently accepting reservations for JS-4 units which will be ready to ship by mid-to-late December. PLEASE CONTACT US TO ORDER YOURS AND TO RECEIVE A CUSTOM SHIPPING QUOTATION. Many user reviews of the JS-4 have begun to appear. See this forum thread for their glowing reports. DC cables are not included with the JS-4; Please look at our SAPPHIRE Silver-Plated, Star-Quad DC Cables —with Neutrik SpeakON plugs to fit JS-4—and request to order one or two to be included with your JS-4 shipment. UpTone presets each unit to operate in 100/115/120V or 220/230/240V countri