HIFI ADIII portable rechargeable tube bile tube amp headphone amplifier

Description

HIFI ADIII portable rechargeable tube bile tube amp headphone amplifier
Description:
The new AD III OCL, the tube can be replaced with an op amp, and is currently a mini portable bile amp on the market.
AD III OCL. Bile amps, the circuit structure is a double three-stage tube, a total of negative amplification and op amp buffer output. Tubes and op amps are indispensable in working conditions. Both tubes and op amps are involved in the amplification.
AD III OCL sound-to-noise ratio is quite good, reaching a level comparable to traditional pure integrated IC portable amps.
AD III OCL bile amp. The circuit structure is straight-coupled output. The straight-coupled output can reduce the effect of the output blocking electrolytic capacitor on the sound quality, reduce the electrolytic capacitor's coloration and excessive artificial modification. The sound quality is more pure and transparent.
This machine bile duct part power supply voltage up to 33V power supply, BC100UF filter pond. Op amp supply voltage +/- 12V, 220UF filter pond.
Second, electronic components
1. All the resistors used in the machine are VISHAY wafer cylinder resistors to ensure sound quality. The low temperature drift is 0.5%.
2, volume control potentiometer, 09 type potentiometer.
3. Input coupling capacitor, Italy AV, Promise capacitor
4. Power filter capacitor, Philips BC
This machine uses a
SYLVANIA 6021
double three-stage tube as the amplification signal, the tube internal resistance is very low, the amplification linearity is ideal and perfect, and the service life is long. The sound is clear and transparent, delicate and round, the music is rich in flavor, and the dynamic range is quite good.
6. The built-in op amp uses
LM4562
. Of course, you can also replace and upgrade your favorite or higher-level op amp IC. Replacing the op amp IC yourself can allow users to improve the playability and fun of the machine and better sound quality.
7, only need to use the mobile phone 5V charger when charging the machine. Full charge is about 3 hours, and the amp's working life is about 5 hours. Support listening while using.
Basic parameters:
Endurance --------------------------- About 5 hours 32 Euro
Frequency response range ---------------------- 20HZ--42KHZ
TND ----------------------------% 0.015 1khz
S / N ---------------------------- 95dB
Output ---------------------------- 1150mW
Load range ---------------------- 16Ω / 400Ω
Measurements ---------------------- 83 * 57. * 24 (without knob)
Charging ---------------------------- 5V1A
Configuration ---------------------------- Machine configuration
One AD III OCL machine
12CM pair of recording line
USB charging cable
Two straps.
Package Included:
1 x HIFI ADIII portable rechargeable tube bile tube amp headphone amplifier
Payment Policy:
We ONLY accepted PayPal payment.
shipping & time:
Generally, delivery time is
10-20
business days to USA, United Kingdom, Australia
and
15-30
days to most other countries
.
Items will be shipped within 1 business day on payment received.
Delivery time depends on destination and other factors, it may takes up to 30 business days.
Import duties
, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility.
Returns Policy:
All sales come with us 14-day warranty. Return items must not be used or have any sign of abuse or intentional damage. Buyer is responsible for all return shipping charges.
We reserve the right not to refund S&H when the item has been posted.
Contact us:
If you have any questions,Please contact with us via eBay message or our customer service e-mail.
You may expect to receive a response to your inquiry within 24 hours. (Excluding Weekends and Public Holidays)
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Please give us the opportunity to resolve any problem. thank you !