1, Powered by USB or Battery, you can use the headphone and charging battery at very same time. (When you goes outside. Use the power bank to powered it. Make it work for longer time),.
2, Usage lot HiFi components in this version. DALE resistors, Nichicon cap, ALPS Potentiometer, gold interface.and re-design the PCB. Make it work better.and use attractive metal case. You will like it.
. 3, Usage dual-tube in this headphone amp tube mode is: 5899, OP chip is original TI NE5532, you also can update it to other much better OP chip.
4, Match for 32 ~ 600 ohm headphone, work time: about 3 hours. (Charging time: about 2 hours).
1x headphone amlifier.
1x USB cable television (charge cable television.
1x 3.5 to 3.5 audio cable television (for connect your mobile phone to B3 amp).
Products in option:.
Gold-plated input/ output socket.
nichicon electrolytic capacitor.
Precision rings resistance.
Direction for use:.
1. CD/MP/MD: connect the LINE OUT/ PHONE OUT signals to B3 INPUT socket by RCA to 3.5 audio cable television.
2. Change & volume control share the very same knob: Appealing rotate the VOL Knob to the left, then plug in your Headset/ earplugs to HEADPHONE socket.
3. Switch on your media gamer, and tune VOL knob from left to right till the volume is suitable.
4. Shut off: When you do not wish to listen, appealing take off the headphone, turn down the volume till the device is powered off.
Frequency response range: 0-100K-0.1 dB.
Output power: 500mW.
Suggest load impedance: 32-600Î©.
Size: 115 * 69 * 23 mm1 (Length XWidth X Depth).
Heating unit voltage: 6.3 V Heating unit current: 300mA.
Anode Voltage: 100V Cathode resistor: 220 Î©.
power amplification aspect: 20.
Little Bear B3 Portable Tube valve cellphone headphone amplifier amp
Newest vesrion, first sale at: 08/20/2015 B3 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.
Features: Portable tube headphone amplifier, the demision is only 11.8cm X7cm X2.3cm (Length XWidth X Depth) (The measurement does not include the knob size.), Including the battery which contains large capacity polymer it is only 190g in weight! Super low voltage work: safe & reliable, do not worry that you might get an electric shock
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.
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 tube5899 Suitable for LOW ESR earphones (performs well with 600Î© DT990 in test.)