HiFi Class A Bile preamplifier LEADAUDIO ARCLS22 tube Class A VU meter 6N11 6922 fully balanced Single-ended XLR 16HZ-

Published: 18.04.2024 18:53 In stock: 6 481 Views

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Description

Bile pre-amplifier ARC LS22 tube class A VU meter 6N11 6922 fully balanced

* This product MG1 comes standard with single-ended version: (2 units available for balance)

* Standard balanced version: (transformer input/output, one machine can balance input and output)

The balanced version is made of 4 Permalloy + oxygen-free copper wires, and the package is shielded by copper foil for 3 layers. The frequency response is flat and the measured frequency response is 20Hz ~ 22KHz ±0.1DB (better than most audio cattle). The sound of the audio cow is detailed and clear, dynamic and broad, very durable

In addition, you can pay for optional upgrades as follows:

1. Upgrade capacitor board: +83 USD

2. Upgrade EH Golden Foot 6922 tube: +176 USD

3. Upgrade Mondolfo EVO oil-immersed capacitors: +95 USD (2 4.7UF, 2 10UF)

Tips:

1. The position of each tube is specific (tested with the instrument in the best condition),do not insert it randomly, otherwise it will affect the effect!

2. WIMA and coupling capacitors are disassembled

3. When the filament is switched to AC power supply, the bottom noise is large (now. AC power supply has been cancelled, please contact if you need to keep AC power supply, but the bottom noise is not guaranteed)

4. Random without accessories, delivery is a bare machine

The circuit refers to the American Audio Research LS22 circuit, with a balanced dual mono design. Many people may have to ask, how does it compare to the original one, it can achieve almost the same effect as the original one. In fact, making imitation is not blindly pursuing the effect of the original one. The original machine has the effect, and others think you are lying),but learn other people’s circuits to realize your own sound characteristics. The main sound characteristics of this pre-stage are: the sound is smooth and durable, the high frequency is extended, and the middle and low frequencies are mellow. Diving Shen, it gives people the feeling that it is very quiet, suitable for long listening, moderate speed, in line with the characteristics of tube amplifiers, and the improvement between music and power amplifier is very obvious. Many people directly connect pure power amplifier to decoder or CD The sound of the machine is often rough, not detailed enough, and lacks level. With this preamp, these conditions will be significantly improved. The even harmonics of -60dB make the sound more rounded and durable!

Features:

1. Optional power supply upgrade kit (refer to German power black box for octave tube amplifier)

2. The lotus seat is changed to rhodium-plated RCA

3. The potentiometer uses ALPS27 imported from Japan, with sound quality performance. Undeniably good, better reliability (change from October 20, 2019)

4. Increase the partition between the circuit board and the transformer.

5. The specially designed relay input selection circuit will not cause the sound of other groups to crosstalk the current channel (this problem will occur in many machines)

6. Output delay design to prevent the DC output impact of power amplifier and speakers

7. Both groups of high voltage adopt op amp servo + FET for voltage stabilization, low temperature wave, high speed, quieter background, better sound quality reduction

8. The hand swing can be turned off (only the hand swing can be turned off, not the light)

9. Filament power supply AC and DC switching (note: filament AC power supply is temporarily cancelled, need to be added, please specify)

10. With the function of adjusting high and low sounds, it can also be turned off (relay switching). The tone circuit has no common bass mixing and high pitch harshness.

11. The electrolysis of the power supply part and the red WIMA are consistent with the original machine parameters, and the sound is neutral and balanced

12. Transformer: Japan Z11 EI86 iron core 90W

13. Chassis: All aluminum standard size: 430*330*100mm, with meter head, weight 10KG, top cover without screw design, big R angle, perfect craftsmanship, you can't find a better chassis than ours at the same price

14. Standard electron tube: domestic 6N11 electron tube X4, E88CC, 6922, 6DJ8 can be replaced

15. Output: 2 groups of RCA+1 group of mono balanced (balanced version is 2 groups of RCA+1 group of XLR balanced simultaneous output)

16. Input: 1 set of mono balanced + 3 sets of RCA (balanced version is 1 set of XLR + 3 sets of RCA)

17. The whole machine is guaranteed for free for one year (the tube is guaranteed for 3 months),and it is maintained for life. Only the material cost

Parameter:

Signal-to-noise ratio: filament DC power supply 100dB (when the output is 2V, the volume is about 2 o'clock position)

Magnification: 6.5 times

Frequency range: 16HZ-100K (±0.5dB)

Tone bass adjustment range: 50HZ±6.5dB

Pitch and treble adjustment range: 15KHZ±6.5db

Input impedance: 100K

Output impedance