PL-L

About the PL-L

The Nagra PL-L is a high-end Pure Class A vacuum tube line preamplifier designed and hand-built in Switzerland. It is based on the proven design concepts of the PL-P but excludes the phono stage and internal battery for power isolation. The PL-L uses three high-grade vacuum tubes (two ECC83 and one ECC81), each hand-selected, burned-in for 12 hours, and computer matched for optimal performance. It features an external power supply with a custom voltage converter housed in a gold-plated box to ensure quiet and stable power, isolated from AC line noise. The preamplifier offers four line inputs: one XLR unbalanced and three RCA single-ended, with automatic muting during source switching. Outputs include two unbalanced RCA stereo pairs and one unbalanced XLR pair, with an option for custom Nagra transformers for floating balanced outputs. The outputs are directly coupled to the output tubes, capable of driving loads as low as 600 ohms with minimal signal drop. The front panel includes volume, balance, input selection controls, and a precision modulometer for level monitoring and matching. A remote control allows for source selection, volume, and balance adjustment without degrading audio quality. The chassis is CNC-machined from hardened anodized aluminum for durability and electromagnetic shielding. The PL-L is designed for audiophiles seeking the highest quality audio performance in an ultra-high-resolution system and was manufactured from 2001 to 2010.