BRZHIFI PAP-711 Field Effect Tube Class A Preamplifier 220V HiFi Power Amplifier Reference Circuit for SANSUI 711

BRZHIFI PAP-711 Field Effect Tube Class A Preamplifier 220V HiFi Power Amplifier Reference Circuit for SANSUI 711

Description:
- The circuit reference is from the SANSUI circuit, which uses 2SK389 twin field-effect transistor differential input. The sound is mellow and durable, with good delicate balance, very similar to the style of a biliary machine. JFET truly has electronic tube sound. Due to the pure thickness and sweet sound of electronic tubes, as well as the characteristics of large dynamic range and ultra-low distortion, field-effect power transistors quickly became popular in the audio industry. This device uses field-effect transistors as the input stage, which can easily meet the most demanding audio application requirements and is suitable for professional and high-end audio systems.

Features:
- The input differential circuit uses the original 2SK389-BL twin JFET transistor for Toshiba, paired with 2SC3381/2SA1349 bipolar transistor for Toshiba, to present a natural and realistic listening experience. The high-frequency is gentle and pleasant, the mid-frequency is warm and sweet, and the low-frequency is rich.
- Field effect transistor differential input
- High and low frequency adjustment function
- Class A linear power supply + electronic filtering
- Stereo fully discrete circuit symmetrical design
- Dual transformer power supply
- Column filtering capacitor
- The power supply circuit, rectification and filtering, amplification and tone circuits are independent and do not interfere with each other.
- Pure Class A circuit+electronic filtering, making sound localization more accurate, with clear separation and details.
- ALPS27 potentiometer, high precision, low noise, wear-resistant.
- Gold plated RCA, low internal resistance, high wear resistance, and oxidation resistance.
- Can be used with different transistor post amplifiers and vacuum tube post amplifiers.

Specification:
- Model: PAP-711
- Maximum output level: 17.5V (valid value)
- Power consumption: 20W
- Impedance matching range: 600ohms - 10Kohms
- Frequency response: 10Hz - 100kHz/±1dB
- SNR: 90dB
- THD + N: 0.01%
- Input impedance: 220K
- Magnification: 5X
- Input channel: AUX1/2/3/4
- Output channel: stereo
- Size: 430 x 242 x 62mm
- Product weight: 4.6kg

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