Little Bear B4 Portable Vacuum & Valve Tube Headphone Amplifier HiFi For Phone
Little Bear B4 Portable Vacuum & Valve Tube Headphone Amplifier HiFi For Phone looks good in design, features and function. The best function of this product is really simple to clean and control. The design and layout are very fantastic that make it really appealing and beauty. Many individuals feel attracted to purchase and utilize it. Every feature is developed to fulfill people require as its function too. It is stunning and ideal product for simple setup, upkeep, and control device.
| Asin | : | B01K4BLG5C |
| Category | : | Electronics |
| Color | : | Black |
| Brand | : | Little Bear |
| Sales Rank | : |
Features Little Bear B4 Portable Vacuum & Valve Tube Headphone Amplifier HiFi For Phone
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Descriptions Little Bear B4 Portable Vacuum & Valve Tube Headphone Amplifier HiFi For Phone
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Parameters:
Frequency response range: 0-100K-0.1dB
Gold-plated input / output socket
NE5532 OP chip (can be upgraded to better OP chips like BB or Muse)
Original nichicon electrolytic capacitor
TOP HiFi Original DALE resistors
Precision rings resistance
Battery: Lithium batteries, voltage: 12V, 1000mA
Charging time: 2-2.5 hours to charging full the battery
Working time: 4-4.5 hours
Output power: 450mW
SNR: 99dB
Suggest load impedance: 16-400Ω
Color: Black / Silver
Size(L*W*D): 115 * 69 * 23 mm / 4.53 * 2.72 * 0.91 in (without knob)
Trouble Shooting:
Q: Right channel has static. Tried different source and headphones. No help。
A: If there is static noise in one channel, normally it is caused by the tube of that channel. Maybe it has a poor contact after the long shipping process. You can open the chasis and adjust the screw near the tube while listening(contact us and we will give you a photo with marks to help you find it). Also, there is a small possibility that the tube is broken. You can buy a 5899 tube in local shops, which is very normal to see. And we will refund you the cost.
Q: It broke just now four loud pops and it's dead. Very disappointed.
A: Mainly because the battery is run out of power. Please charge it. If not help, please contact us.
Q: The Amp has a lot of electronic feedback/interference when a cellphone is hooked up to it or nearby. It creates popping in the headphones.
A: Vacuum tubes are easy to be interfered by devices that can trandfer siganl like cellphones, routers. Please keep the amp away from them.
Q: Won't hold a charge, sounds like something is loose inside.
A: The charger is broken. Please contact us to get a new one.
Packing List:
1 * headphone amplifier
1 * power supply
1 * 3.5mm audio cable
1 * band
Frequency response range: 0-100K-0.1dB
Gold-plated input / output socket
NE5532 OP chip (can be upgraded to better OP chips like BB or Muse)
Original nichicon electrolytic capacitor
TOP HiFi Original DALE resistors
Precision rings resistance
Battery: Lithium batteries, voltage: 12V, 1000mA
Charging time: 2-2.5 hours to charging full the battery
Working time: 4-4.5 hours
Output power: 450mW
SNR: 99dB
Suggest load impedance: 16-400Ω
Color: Black / Silver
Size(L*W*D): 115 * 69 * 23 mm / 4.53 * 2.72 * 0.91 in (without knob)
Trouble Shooting:
Q: Right channel has static. Tried different source and headphones. No help。
A: If there is static noise in one channel, normally it is caused by the tube of that channel. Maybe it has a poor contact after the long shipping process. You can open the chasis and adjust the screw near the tube while listening(contact us and we will give you a photo with marks to help you find it). Also, there is a small possibility that the tube is broken. You can buy a 5899 tube in local shops, which is very normal to see. And we will refund you the cost.
Q: It broke just now four loud pops and it's dead. Very disappointed.
A: Mainly because the battery is run out of power. Please charge it. If not help, please contact us.
Q: The Amp has a lot of electronic feedback/interference when a cellphone is hooked up to it or nearby. It creates popping in the headphones.
A: Vacuum tubes are easy to be interfered by devices that can trandfer siganl like cellphones, routers. Please keep the amp away from them.
Q: Won't hold a charge, sounds like something is loose inside.
A: The charger is broken. Please contact us to get a new one.
Packing List:
1 * headphone amplifier
1 * power supply
1 * 3.5mm audio cable
1 * band