Little bear B5 HiFi Portable Vacuum Daul-valve 6418 tube headphone amplifier amp
Direction for use:
OFF sale for this month.(end at :7/31/2016)
B5 is a tube mini headphone amplifier,size：115*60*13 mm,like a 6s cellphone. the sound feels warmer than transistor products. it has built-in battery protection circuit. It powers off after is is fully charged automatically, the charger LED turn to GREEN. Can realize the use of human intelligence. Else. we do not suggestion charging the battery and turn ON the amplifier at same time. it's bad for battery and the sound may with loud noise.
Because 6418 tube with some microphone effect. so. when you knock the B5 metal shell. it's will with some "wing~~~~~~" noise. and that noise will gone about 5 seconds. that's normal . and if possible. do not put the B5 too close to your cellphone. because the cellphone 4G or WiFi signal will effect the tube. and make noise. just remark it.
Package included:
1x B5 main amplifier
1x 3.5 to 3.5 cable. for connect your cellphone to B5 amplifier
2x bangages
1x charger (work at 110~240Vac, and with US,AU,EU,UK plug for choice.l will sent correct one to you by your address)
Performance parameters:
Frequency response range：0-100K-0.1dB
Gold-plated input/output socket
PT2308 OP chip (you can upgrade it to a other better brand OP chip. 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: 5~8 hours
Output power：80mW
SNR：99dB
Suggest load impedance ：16-100Ω
Size：115*60*13 mm(Length XWidth X Depth)(The measurement doesn't include the knob size.)
Reference data for 6418:
(A type Amplified state):