Fu19 vacuum tube headphone amplifier 4W*2 class a HiFi home headphone power amplifier for Sennheiser HD600 HD650 HD700 H

Features

1 Use Beijing 6n2 electron tube to drive and Beijing fu19 vacuum tube to connect Class A amplifier circuit in parallel, and use output transformer to output

2. The core output transformer adopts Z11 0.35MM 66*19 silicon wafer, which is wound by special process, and the power supply adopts H 14 3600.5 annealed silicon wafer.

3 One line audio source input, perfect headphone protection circuit, output transformer no-load protection

4. The original designer's senior with a fever (Lao Jiaxin) provided the prototype circuit, and the senior with a fever (Ban Yi Lao Chen) improved the circuit and installed the prototype. After half a year of selecting components and improving the sound, the finalized production was launched for sale , Mass production is strictly in accordance with the assembly of components during tuning

Audition target headset and sound description

1. The matching earphones are: Sennheiser HD800 flagship headphones paired with this machine and Italian RP030 professional

Headphone amplifier comparison audition

2. The sound description is: 6n2+fu19 is a dual-use amplifier for audiophile earphones. It is a high-quality headphone amplifier with performance in the audio band. The overall low, medium and high frequencies are balanced. Full-bodied, with a special advantage in high frequency, the whole high frequency layer is clear, every detail, at the same time there is no split in the extreme high frequency, the details of the sound, stretch and bright high frequency are well controlled! This product has a comprehensive sound performance and can be praised as a cost-effective headphone amplifier.

Features

The signal source may be a CD player and a computer audio source (the computer sound card must have a line output port)

1 Use all the AC filaments to light the lamp, try listening with 102DB earphones, you can't hear a little bit of AC noise, and it feels as quiet as if you didn't turn it on

2. Use fu19 parallel Class A amplifier circuit driven by 6n2, output 4w+4w power amplification to drive the speaker. It is required to be equipped with a two-way speaker with an impedance of (4-8) ohms, a sensitivity of 6.5 inches above 90db, and headphones of 19-600 ohms about 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 with an accuracy of up to 1% and imported electrolytic capacitors.

5 0.8mm brushed stainless steel with wooden chassis structure,

Performance Specifications:

The output characteristics of this machine, the 4 ohm port is a direct output, and the 8 ohm output is switched with the headphone jack switch

1. Full name of the product: 6n2+fu19 power amplifier+amplifier dual-purpose machine vacuum tube amplifier

2. Product color: brushed surface stainless steel natural color

3. Product weight: about 6kg with packaging size 40*35*25cm

4. Product size: size 32*18*16cm including tube height

Parameters Table

Input: one RCA input

Output: The output impedance of the power amplifier interface on the back is 4 ohms, and the second group of 8 ohms

interfaces is 4w+4w

Front 6.35mm standard headphone output jack 19-600 ohms

· Frequency response: 26-38KHz ±2db

Output signal to noise:>118dB "A"- wtd

Output THD: <0.008% 10Hz to 20kHz

· Peak output of the amp: (about 1w) (for the corresponding power, please calculate the impedance of the earphone)