A20 HiFi Power Amplifier MOS Tube Treble Bass Double VU Meter 200W+200W Support Remote Control and Balanced Input

A20 HiFi Power Amplifier MOS Tube Treble Bass Double VU Meter 200W+200W Support Remote Control and Balanced Input

Features:
- 200W + 200W, dual VU meter indication, support direct-pass function and treble/bass adjustment.
- The A20 HiFi power amplifier circuit is optimized from the circuit architecture of the famous machine. It takes its essence, constantly improves and auditions, repeatedly corrects and calibrates the sound to finalize the design. Each channel uses two pairs of IRF240 and 9240 field-effect transistors for parallel power output to ensure sufficient strength and control. High current output makes it easy to drive the large speaker. Thanks to the good architecture of the circuit, the sound is very powerful in big dynamics, and the performance of the field tubes is more detailed. The warm voice and the unique attractive sound color of the field tubes are desirable.
- A20 is a combined power amplifier that includes a preamplifier and is designed with treble and bass adjustment functions. It can achieve correction and adjustment of high and low frequencies. A20 can also be a pure post amplifier: it has a direct pass through function, as long as the direct pass through switch is turned on, the signal will directly enter the post amplifier circuit without going through the preamplifier, and can be used as a pure post amplifier, making it convenient to match different high-end preamplifiers.
- A20 has a direct pass through function, as long as you switch to the direct option, it is a pure post amplifier, which can be externally connected to various higher-level preamplifier for use.
- The panel design sometimes features a popular dual VU meter audio level indicator, which jumps with the size of the music during playback, making it very dynamic and visually appealing.
- The power amplifier adopts independent design for left and right channels, with a separate amplifier board on each side responsible for power amplification. The power supply also has 6-wire output and dual rectification independent filtering, achieving true complete left and right independence. The HiFi design has simple and neat internal wiring, achieving complete interference free noise.
- The circuit is repeatedly optimized and debugged, equipped with various HiFi components, with a wide and elastic sound frequency response. The main components on the board use the electrolytic capacitors for WIMA. The customized audio specific resistance components are all HiFi products, and the power output tubes are all original imported field-effect transistors, ensuring sound quality.
- Using imported original field-effect transistors, with 8 output tubes, 4 tubes per channel can provide an effective power output of up to 200W, which is powerful and sufficient for household use. It is also easy to drive the large speakers.
- Using for YSAIO specially customized ring transformer, dual transformer independent power supply, HiFi pure copper wire is used to create high power, and central sealing treatment is added to prevent vibration, low noise, anti-interference, and improve signal-to-noise ratio.
- The dual 50A high current filtering rectifier circuit uses a total of 8pcs 10000UF63V high-capacity capacitors as filtering capacitors, with a total capacity of 80000UF and sufficient energy. Equipped with a dual ring transformer, it is sufficient to meet the low-frequency diving and playback needs when playing various dynamic music.
- Using HiFi ALPS imported blue shell 27-type potentiometer, strictly paired and consistent on both sides; low error, high-precision consistent restoration of music details.
- The input selection transmission part uses fully sealed signal dedicated relays with very low resistance for Omron and NEC. This type of relay can achieve almost no loss when used for signals.
- The A20 is designed with protective relay output, midpoint voltage protection, startup delay protection, overcurrent protection, etc., which can effectively protect the safety of the speaker system. The dedicated ICC1237 is equipped with imported relays for Omron to ensure both sound quality and durability.
- The all aluminum refined chassis adopts imported CNC technology and aviation grade fine processing. The silver white panel is elegant, noble, high-end, and atmospheric. The panel is equipped with dual meter level indicators, which are full of dynamism.

Specification:
- Input voltage: AC220V/110V
- Output power: 200W + 200W
- Frequency response: 10Hz - 30kHz
- SNR: 110dB
- THD (1W): 0.001%
- Input impedance: 50Kohms
- Output impedance: 2 - 8ohms
- Input: RCA x 4 sets
- Net weight: about 12kg

Package Included:
- 1 x Host
- 1 x Power Cable

Precaution:
- A20 is a combined power amplifier with an internal preamplifier that can be directly used with speakers; at the same time, the A20 can also be set to have a direct pass function and be used as a pure rear stage. At this time, it can be used in conjunction with different transistor preamplifiers and tube preamplifiers, as well as operational amplifier pre-amp.