Single-Ended Tube Amplifier Class A Tube Amp Power Amplifier Minava SE-300B with 10W Output Description: The SE-300B has been upgraded by adding a set of RCA inputs (DIRECT INPUT), so that the SE-300B can be used as a power amplifier. Features: – Single-ended stereo combiner and pure class A tube power amplifier in one – Tube circuit design: two 6N8P preamp tubes, two PSVANE 300B power tubes, and one 5AR4 rectifier tube for RUBY – Big transformer: EI105 power transformer (Japan silicon steel sheet for Kawasaki), EI86 (Z11) output transformer, and EI48 filter inductor – Imported capacitors (large filter electrolytic capacitors) for RUBYCON; red large capacitors (for WIMA) for audio circuit – High-quality gold-plated RCA sockets and speaker sockets – Full mirror stainless steel body and front and rear 8mm/0.3 aluminum panels in space gray Product Parameters: – Input impedance: 100K Ohm (RCA) – Output impedance: 4 ohms and 8 ohms – Output power: 10W (pure class A at 8 ohm load) – Frequency Response: 20Hz-20KHz (-1dB) – THD. When choosing CD INPUT, please connect your CD player and other audio sources. When choosing DIRECT INPUT, please connect to your preamplifier and use the SE-300B as a power amp. Usually it cost about 35USD-50USD. Thanks for your understanding. If you receive defective item, please kindly notify us within 14 days.