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Portable tube headphone amplifier, the demision is only 10cm X7cm X2.3cm (Length XWidth X Depth)(The measurement doesn't include the knob size.),including thebattery which contains large capacity polymer it is only 190g in weight!
•Super low voltage work:safe & reliable, don't worry that you might get an electric shock
•Lithium batteries:enough power supply.
•3 hours cruising,the Actual situation with machine: clear voice,High resolving power,details performance skillfully,high frequency sounds mellow,neither too high or too boring.medium frequency sounds pure.Low frequency sounds good-nature,resistance to listen to but not turbid. The whole voice sounds pure, Ryan and Sharpay.Symphony performances well,the sound of each instruments can be reconised clearly.
•Internal adopts miniature American tube 6111 or 6021.
•Suitable for LOW ESR earphones(performs well with 600Ω DT990 in test.)

Application:
1.Connect MP3：Headphone socket:3.5mm socket Input socket:3.5mm socket: Easy to connect to MP3 directly

2.Connect CD：when you connect to CD,you could use 3.5mm to RCA socket connection cable.
3.Use as Pre-amp：Cane be used as pre-amplifier:connect the power amplifier from the headphone input socket.

Materials in selection:

•Gold-plated input/output socket
•NE5532 amplifier
•nichicon electrolytic capacitor
•Precision rings resistance.

B-1 is a tube headphone amplifier, the sound feels warmer than transistor products. it has built-in battery protection circuit. It powers off after is is fully charged automatically, Can realize the use of human intelligence.

Direction for use:

1.CD/MP/MD:connect the LINE OUT/PHONE OUT signals to TU-10 INPUT socket by RCA to 3.5 audio

cable.
2.Switch & volume control share the same knob:Please rotate the VOL Knob to the left,then

plug in your Headset/earplugs to HEADPHONE socket.
3.Turn on your media player, and tune VOL knob from left to right till the volume is

suitable.

4.Turn off: When you do not want to listen, please take off the headphone,turn down the

volune till the machine is powered off.

Buyer's Notes:

1：Please charge it only when it's power off. Or it will affect the Charge balancing of the 2 Lithium battery so that you might be unable to charge it.
Please pulled out the power supply while using it!

2. Storage: Please keep it fully charged before storage if you do not use it for a long period. Be sure to charge it every 3-6months,Empty electricity stored isforbidden!
3.If it is ran out of electrisity, the volume will become smaller, please charge it in time.
It's better to avoid charging it till it's completely ran out of electrisity!
4.Power supply indicator:The indicator light is red during charging, it turns green while the machine is well charged. The average charging time is 1-3 hours.



Performance parameters:

Frequency response range：0-100K-0.1dB
Output power：500mW
SNR：99dB
Suggest load impedance ：16-600Ω
Size：100*69*23 mm1(Length XWidth X Depth)(The measurement doesn't include the knob size.)
Reference data for 6111:
(A type Amplified state):
•Heater voltage:6.3V Heater current:300mA
•Anode Voltage: 100V Cathode resistor: 220 Ω
•power amplification factor:20
•Anode essential resistance:4000Ω
•Transconductance:5000um/s Anode circuit:8.5mA
•Grid voltage:-9V

(Absolute rating):
•Anode voltage:150V Negative grid voltage:55V
•Anode dissipation power:0.95W
•Anode circuit:22mA Grid circuit:5.5mA
•Peak voltage between Heater and cathode:200V
•Grid-leak resistance: 1.1MΩ
•Bulb temerature:220℃

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