SUQIYA-High Pressure Oil Immersed Capacitor Marantz M7 FET 2SK1170 12AX7 Tube Preamp 6X4 12AU7 Tube Preamplifier Amplifier Audio

This line imitates the Marantz (M7) improved Tube Preamp. 12AX7 is used for two-stage amplification, followed by 12AU7 cathode follower as the signal buffer. As we all know, Marantz 7 Tube Preamp is famous for its sweet medium frequency, but its analytical power and high and low frequency extension are not good. In view of the shortcomings of traditional Marantz 7, some adjustments have been made to the selection of coupling capacitance capacity and negative feedback loop, The improved Marantz 7 Tube Preamp high and low frequency playback has a certain degree of extension and strength, and the medium frequency is better. The Tube Preamp is most suitable for listening to voice and string music!

The oil immersed marantz M7 Tube Preamp, the high-voltage anode power supply is still provided by the high-voltage oil immersed capacitor as the filter, and the input and output coupling capacitors also use the oil immersed capacitor. The sound also gets another different surprise. The sweetness of the voice really fascinates you. Compared with the marantz M7, which does not use the oil immersed capacitor, the low-frequency diving is deeper and stronger; The mid frequency voice is more thick and sweet, the high frequency voice is more delicate, and the sound balance is better!

1: The high-voltage part of the power supply uses 6×4 electronic tube as the tank rectifier+Japanese Watana type high-voltage voltage stabilizing circuit. The 6×4 rectifier tube is much better than the domestic 6z4 and Russian 6u4n in speed, detail and analytical power! The Japanese Waada type high-voltage voltage stabilizing circuit uses Hitachi field-effect transistor 2SK1170. As we all know, field-effect transistors have the advantages of low output internal resistance, small ripple coefficient, sweet sound, etc. This is the difference between this circuit and other sellers, and also a highlight of this machine. This circuit also has a high-voltage delay, filament delay (LT1085 voltage stabilizing), which can prevent starting impact, and can protect the life of some amplified electronic tubes. After the voltage is stabilized, it is more wonderful. After the voltage is stabilized, a three-level RC high voltage oil immersed capacitor is used as a filter to make the voltage more pure. The high voltage oil immersed capacitor creates a super poisonous voice, a delicate high frequency, and a pure thick and powerful low frequency, making the sound performance very balanced!

2: The coupling capacitor of the amplification part adopts the American Sibi, Jiadan, Weima and other good sound fever capacitors (standard version); Soviet Union oil immersed, German Mondorf copper foil (balanced version)

3: The power transformer is expensive and rare R transformer in the audio industry at any cost, which can be seen only in high-end audio. The chassis is all aluminum high-end chassis, large solid all aluminum knobs, pure copper input and output RCA base, Japanese alps27 volume potentiometer, EIZZ signal selection switch, Japanese Kanami signal wire, etc. The resistance is KOA, Panasonic, which makes the sound more pure and transparent!

4: All aluminum alloy chassis, chassis size: width 430mm * height 90mm * depth 360mm

5: This machine uses vacuum tubes:

1. Power rectifier tube: 6Z4 or 6×4/1

2. Two small signal amplifier tubes 12AX7 (the following electronic tubes can be used to replace ECC83 and ECC803S)

3. One follow-up output tube 12AU7 (the following electronic tubes can be used to replace ECC82, E82CC, ECC802S)
Note: No cables are included