JEL 2A3 Deluxe

About the JEL 2A3 Deluxe

The JEL 2A3 Deluxe is a single-ended triode (SET) amplifier designed by Tube Audio Lab, featuring pure Class A operation with directly heated 2A3 tubes. It typically delivers around 3.5 to 4.5 watts per channel before clipping, depending on the exact circuit and components used. The amplifier uses a combination of 2A3 power tubes, 76 type tubes, 6SN7 tubes for input and driver stages, and a 5U4GB rectifier tube. It employs high-quality output transformers such as the James 6123HS 20W OPTs, contributing to its refined sound quality. The frequency response is typically flat within ±0.5 dB from 20 Hz to 20 kHz at 1 watt output, with a slight roll-off beyond that range. The amplifier is known for its smooth, rich tonal color and holographic soundstage, characteristic of SET designs. It is optimized for use with efficient speakers, often horn-based, due to its limited power output. The design is appreciated for its musicality and detail but requires careful matching with speakers and system components to achieve the best results. The amplifier is a kit or DIY project favored by enthusiasts who appreciate classic tube sound and craftsmanship.