Портативные усилители Little Bear

[syncmaster172n]

Портативные ламповые/гибридные?/ усилители от компании Little Bear,
новинкой не являются, но темы по ним не нашёл, и решил создать.

Little Bear B1 Plus+

Спойлер: 

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)
Net Weight:190g

Materials in selection:
Gold-plated input / output socket
NE5532 amplifier
nichicon electrolytic capacitor
Precision rings resistance.

Сравнение с ibasso d-zero
https://www.youtube.com/watch?v=X6YQPfYZlpA

фотки

Спойлер: 

есть в серебристом и чёрном цвете
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Little Bear B4

Спойлер: 

Performance parameters:

Frequency response range：0-100K-0.1dB
Gold-plated input/output socket
NE5532 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: 4-4.5 hours
Output power：450mW
SNR：99dB
Suggest load impedance ：16-400Ω
Size：115*69*23 mm1(Length XWidth X Depth)(The measurement doesn't include the knob size.)
Reference data for 5899:
(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

фото

Спойлер: 

есть в чёрном и серебристом цвете
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анбоксинг предыдущей модели B3
https://www.youtube.com/watch?v=XmLvGKvS2i8

Little Bear B5 mini

Спойлер: 

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)

Reference data for 6418:
(A type Amplified state):

Heater voltage:1.25V Heater current:10mA
Anode Voltage: 60 Cathode resistor: 220 Ω
power amplification factor:20
Anode essential resistance:4000Ω
Transconductance:5000um/s Anode circuit:8.5mA
Grid voltage:-9V

фото

Спойлер: 

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