Description

B4-X Portable Dual-Mono Vacuum Tube Balanced Headphone Amplifier Audio Amplifier Description 1. B4-X is a dual-mono balanced version. Its left and right channel are amplified by independent components, and power supply, tubes, and op amp are all independent and symmetric. 2. B4-X adopts 2 groups of independent power supply(+12V and -12V) for 2 op amps, less mutual effects and can drive 300Ω headphones. 3. The circuit adopts dual op amp parallel output, with higher output power. 4. B4-X has 3.5mm and 2.5mm 2 kinds of output interface, suitable for most of balanced and standard headphones. 5. Charging with 12.6V charger. Working time for 4-5 hours with 2-hours full charging. Features: - Mini size and unique design: built-in tube makes you have a tube amplifier which can be held by one hand, convenient to carry and can enjoy HiFi music everywhere. - With built-in battery protection circuit: It can't be turned on during charging and will power off automatically after fully charged, and charger LED will turn to green. - Delicate and soft sound: warmer than transistors, independent op amp and power supply inhance the SNR and degree of separation, less interplay and higher sound quality. - High-end making material and craft: using gold-plated socket, original nichicon electrolytic capacitor, original DALE resistors and precision ring resistance. Specification: Tube: USA RAYTHEON JAN5784 ×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 Size: 114 * 71 * 25 mm (does not include the knob) What in Package: 1× B4-X headphone amplifier 1× Power supply 1× 3.5mm audio cable 2× Bundling belts 1x User manual NOTE: 1.Your valid phone number is very necessary for the shipping, otherwise we can't guarantee that the package would safely arrives. 2. Any Customs tax applied to this package should be covered by buyers. 3.As has been stated on the eBay item description, Import duties, taxes and charges are not included in the item price and shipping charges.These charges be at the buyer responsibility. meanwhile the customs tax depend on the buyer local customs office.