JP500

About the JP500

The Jadis JP500 is a high-end, tube-based dual-mono line preamplifier with a separate power supply and four chassis/blocks. It uses output transformers and supports balanced and unbalanced operation. Published descriptions identify it as a no-compromise reference preamplifier with multiple line inputs, tape monitoring, Z-adapter connections, phase inversion, and substantial tube-based power-supply circuitry. Available documentation is inconsistent on some details, particularly the number of line inputs, exact gain, dimensions, tube complement, and power-consumption terminology; the figures below therefore distinguish commonly published specifications from variant or source-dependent data. Current Jadis catalogues and dealer listings continue to show the JP500, so it should not be classified as definitively discontinued, although availability may be limited and individual versions may be special-order or market-dependent.