The Gullwing SLR brings much of the LP-S generator architecture to an open brass body. A square ruby jewel-plate generator, solid boron cantilever and nude line-contact diamond give the SLR an unusually direct, low-mass mechanical path.
Output is 0.34 mV at 3.54 cm/s with 40-ohm internal impedance. Sierra Sound recommends 500–47,000 ohms loading, 1.8–2.2 g tracking force and low- to medium-mass tonearms.