They claim that this increases the degree of sound separation between channels when compared to the B4. Power supply, tubes, and OpAmp chips are all independent and duplicated. Unlike the B4, its left and right channels are amplified by independent components.
#Headphone tube amp portable#
The B4-X isn’t the only portable tube headphone amplifier option currently available from Douk Audio. Dual is misspelled “Daul” on both the board and the case.ĭouk Audio’s Other Portable Tube Amplifiers.Little difference between balanced and unbalanced outputs.Occasionally temperamental sockets causes channel cut-outs and imbalances.Unlabelled and unprofessional tape-covered package.The front window fell out with minimal use.Audible interference from nearby cell phones.Balanced and unbalanced outputs? Check.Īll for around a $100 USD! How is that even possible?.Socketed OpAmps to allow for OpAmp rolling? Check.So, what makes the B4-X portable headphone amplifier so interesting? Today we will be looking at a perfect example of this phenomenon, the Little Bear B4-X. Devices that would likely never get manufactured anywhere else. High tech components with eye-catching features at puzzlingly low prices. The product lineup is a super-interesting array of unique audio doohickeys and gadgets, and it exemplifies a fascinating side of Chi-Fi. They produce a wide range of stereo amplifiers, headphone amplifiers, DACs, phono stages and preamps, with an emphasis on vacuum tube components. The company motto is to “make Hi-Fi affordable” by following the rules of (in their words) “quality-oriented, customer-centered and constant innovation”.
#Headphone tube amp full#
A Curiosity full of Tubes and Compromisesĭouk Audio (also known as Nobsound), a subsidiary of Shenzhen Cavins Technology Co., Ltd., was founded in 2013 in Shenzhen China.
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