Price: $2500 Color Black Silver * AMP and PSU ship in a molded foam within a double-wall box * Power supply umbilical cord is included. * 1 pair of 300B, 6SN7, and 2 tube rectifiers are included. * AC Power cord and RCA interconnect cables are not included. * Shopping cart applies to the U.S. buyers only. International buyers please contact for shipping cost and payment instruction. Technical Specifications: Two 300B [PDF] power tubes Two 6SN7 [PDF] drive tubes Two 5U4G [PDF] rectifier tubes Voltage: AC 110/220V, 50/60 Hz External dimension (each): 8½(H), 9"(W), 17"(D) Weight: Amp Unit: 35 lbs, Power Supply Unit: 40 lbs Headphone Amplifier Specifications: Headphones impedance : 8-800 Ohms Frequency response: 10 Hzâ€"60 KHz, -2dB Power output = 1.5 watt Signal/Noise: = 95 dB THD: = 0.08%, 1Khz Standard Features: High-end output transformer design Point-to-Point wiring One 1/4" headphone jack for high impedance output, and One 1/4" for low impedance Four pairs of gold-plate RCA inputs Selectable input switch Parts upgrade: $1100 Premimum parts upgrade package. (Parts upgrade are intended for amplifier purchase, not to be sold on a standalone basis.) We carefully selected the best possible audiophile graded parts that bring the ultimate performance from the amplifier. V-Cap input coupling caps. Matched pair 0.15uf/600V Jensen voltage filtering caps, 220uf/450V Blackgate bypass (6SN7 cathode) caps, 220uf/160V Blackgate bypass (6SN7 cathode) caps, 220uf/16V Blackgate bypass (300B cathode) caps, 470uf/160V Jensen decoupling caps, 100u/500V Teflon tube sockets upgrade: $150 (8-pin x4, 4-pin x2) Teflon is a superior material with great isolation and tempreture endurance. The unique design of multiple pin contact area greatly increase connectivity and gripping. Pins are gold-plated over oxygen free copper. Click to see details 2 3 4 Power tubes upgrade 1: Sohpia Royal Princess 300B matched pair All tubes are tested by us in an actual amplifier to meet the highest quality. $1200 with 12-month warranty Sophia Electric applied all expertise learned from the past to this new flagship Royal Princess 300B model. It has the best virtues of both Princess mesh plate and Princess carbon plate 300B tubes and sound light-years ahead of any 300B tubes made in the history including both Sophia Electric Princess Carbon Plate 300B and Princess Mesh plate 300B tubes that won worldwide praises. The Royal 300B's come in an exquisite wooden box. Click to see details. Power tubes upgrade 2: Sophia Princess 300B Mesh Plate black base matched pair. $365 Comparable to Western Electric 300B. Buy and ship independently. The result is a 300B mesh plate tube with super clarity, low distortion and out of this world mid range fullness and liquidity. High frequency extension and sweetness is the first thing you would hear. This is a true 300B tube that is 100% interchangeable with the popular Sophia Electric globe shaped 300B mesh plate tubes and Western Electric 300B tubes, as well as current production Chinese/Russian 300B tubes (with WE 300B standard). Driver tubes upgrade: Hand-pick matched pair Sylvania VT231 NOS tubes We tested these tubes in an actual amplifier to ensure the highest quality. $300 (2 pcs) with 30-day warranty. You get a clean and dense sound image with these tubes. It is very low noise, smooth and delicate in the upper frequency range, deep and solid bass, high clarity. Rectifier tubes replacement: Sophia Princess Mesh Plate 274B rectifier. $320 (2 pcs) with 30-day warranty To impact WA5's sound quality or for your super backup. Buy and ship independently. Sophia Electricâ„¢ 274B tube is a premium rectifier tube for a 5U4/5R4/5AR4 direct replacement with 3X longer plate structure, thus it has a deeper, wider sound stage and even smoothier sound than Mullard 5AR4.