Little Bear B4-X Portable AUX Dual-Mono Vacuum Tube Headphone Amplifier Balanced BLK
Little Bear B4-X Portable AUX Dual-Mono Vacuum Tube Headphone Amplifier Balanced BLK
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SPECIFICATIONS
Tube: USA RAYTHEON JAN5899 ×2
Op amp: NE5532*2 (can be upgraded)
Lithium Battery: 12V, 1000mA
Charging time: 2-2.5 hours
Working time: 4-4.5 hours
Output power: 450mW
SNR: 105dB
Suggest load impedance: 16-300Ω
Output: 2.5 balanced Jack*1, 3.5mm Jack *1
Dimensions: 115 * 69 * 23 mm (L*W*D)
1× power supply
1× 3.5mm audio cable
2× band
Features:
B4-X adopts 2 groups of independent power supply (+12V and -12V) for 2 op amps, less mutual effects and can drive 300Ω headphones.
The circuit adopts dual op amp parallel output, with higher output power.
B4-X has 3.5mm and 2.5mm 2 kinds of output interface, suitable for most of balanced and standard headphones.
Let customers speak for us
FiiO FW3 LDAC True Wireless Earbuds with Custom PEQ
Sounds great considering the size and price.
I recommend it
It's only now that I have an emotional appreciation of music.
Output from dm13 to light to K11 R2R
You can connect it and enjoy it with a vacuum tube amplifier.
It's comfortable and nice.
Cayin MT-45MK3 Hi-Fi Vacuum Tube Integrated Amplifier AB1 Class
FiiO FW3 LDAC True Wireless Earbuds with Custom PEQ
Nowadays, because of this product, the ears are strong.
It's great to buy these products at this price.
It is implemented as a mono system. It's very good.
Beautiful piece of equipment! I can not say too much about the sound after only 5 hours of listening, but it does sound gooood. 👍
Everything exactly as it appeared on the web. Very well.
Came safe and sound. Everything is fine!
