LJ "6SN7 SRPP" is the "all rounder" line preamp, all music genre. Good sound-stage, good tonal balance, good vocal and music instrument.  Is the most popular vacuum tube line pre amp, and the best-selling item within 5 years of the LJ Audio line products. Lead time: ready stock, or in 2 weeks if status is out of stock.

• Model: LJ 6SN7 SRPP #6, July 2012. Old stuff: here.
• Designs:
  • Circuit topology: SRPP (shunt regulated push-pull), single-ended pure class A.
  • Feedback: zero global.
  • HV supply: tube rectifier, C-L-C filter.
  • Filament supply: AC.
• Features/Optional:
  
  • Input: 1 pair RCA (optional: 2 pair RCA, select by toggle switch).
  • Output: 1 pair RCA.
  • 2-steps firing rotary-switch: off > on stand-by (mute) > on operate.
  • Muting: output muting by relay (optional).
• Key parts:
  
  • Tubes: 2x 6SN7 signal tube, 1x 6X5 rectifier tube (see available options).
  • Resistor: Allen-Bradley (USA) old-carbon composite resistor, Vishay Dale (USA) metal film resistor.
  • Capacitors: Bennic FPP or Russian PIO (paper-in-oil)  signal caps, Jamicon (Japan) and RS PSU caps.
  • Others: Alfa selected vol-pot (Japan), LJ custom power trafo and PSU choke.
• Chassis: LJ wood chassis (vinyl), LJ nickel chrome top plate, LJ nickel chrome trafo cap.
• Construction: point to point wiring, real star ground, chassis/earth float to ground line.
• Net weight: 5.5 kg (approx.). Shipping weight: call please.