Description
Features
1 Adopt Beijing 6n2 electronic tube to promote the parallel connection with Beijing fu19 vacuum tube class A amplifier circuit, and use output transformer to output
2 The core output transformer is made of Z11 0.35MM 66 * 32 silicon wafer, which is wound by a special process, and the power supply is made of H 14 360 0.5 annealed silicon wafer.
3 One line audio source input, perfect headphone protection circuit, output transformer no-load protection
4 Prototype circuit is provided by the original designer Fever Senior (newly edited by the old driver), and then there is a modified circuit of the Fever Senior (Bold Arts and Old Chen), a prototype is installed, and after a half-year selection of components for tuning and improvement, the finalized production is put on sale , Mass production strictly in accordance with the component assembly during sound tuning
5 Listen to the target headphones and sound description
6 Matching audition headphones are: Sennheiser HD800 flagship headphones with this machine and Italian RP030 professional headphone amplifier comparison audition
7 The sound is described as: 6n2 + fu19 fever earphone dual-use amplifier, a high-quality amp with performance in the audio band, overall low, medium and high frequency balance, with tube A characteristics, low-frequency volume and strength, full mid-frequency warm The mellow, high frequency has a special advantage, the whole high frequency is distinct, the wire is in the buckle, and at the same time there is no split at the extremely high frequency, the details of the sound, the stretched and bright high frequency are well controlled! This sound performance is comprehensive, can be praised as a cost-effective headphone amplifier
Features
The signal source may use a CD player and a computer audio source (the computer sound card must have a line output port)
1 Use all AC filaments to light up, use 102DB headphones to listen to it, you can not hear a little bit of hum noise, and feel the same quiet
1 Adopt fu19 parallel A-type amplifier circuit driven by 6n2, output 4w + 4w power amplifier to drive the speaker requires an impedance of (4- 8) ohm two-way frequency speakers, sensitivity of more than 6.5 inches above 90db, headphones 32-600 Euro 1w)
3 The volume potentiometer adopts Taiwan-funded A100k fully sealed potentiometer to ensure clear positioning and left-right balance
4 Use metal film resistors and imported electrolytic capacitors with an accuracy of up to 1%.
5 Ship gray 1mm iron plate shower spray paint panel and back printing
Performance specifications:
The output characteristics of the machine, the 4 ohm port is directly output, and the 8 ohm output is switched with the headphone jack switch
1. Product name: 6n2 + fu19 power amplifier + amp dual-use machine vacuum tube amplifier
2. Product color: ship gray 1mm iron plate spray paint panel and back printing
3. Product weight: Net weight about 5.5kg 29.5 * 17.5 * 5.5cm chassis, with packaging 7kg size 40 * 35 * 25cm
4. Product size: size 29.5 * 17.5 * 15cm including tube height
Parameters Table
· Input: One RCA input
· Output: the rear power amplifier interface output impedance 4 ohms 8 ohms two groups of interfaces 4w + 4w
Front 6.35mm standard headphone output hole 32-600 Euro
Frequency response: 26-38KHz ± 2db
Output signal noise:> 118dB "A"-wtd
Total harmonic distortion of output: <0.008% 10Hz to 20kHz
· Peak value of amp output: (about 1w) (corresponding power, please calculate the impedance of the headset)
