In response to some shortcomings of the traditional Marantz 7 circuit, the Japanese. Improved on the Marantz 7 circuit.The improved circuit is called the Hetian Mao circuit. Its main feature is to replace the cathode of the Marantz 7 circuit with the SRPP circuit. The follower does not have any voltage amplification due to the SRPP output stage.
It is only used as a buffer stage. It has a stronger driving load than a normal cathode output. In terms of tone, it maintains the Marion 7 line IF sweet. Features, its analytical power and high frequency low frequency response are better than Marantz 7, high signal to noise ratio.Some time ago, according to the special requirements of a guest, I was asked to customize a high-voltage anode power supply to be filtered by a high-pressure oil-immersed capacitor. The input-output coupling capacitor also used an oil-immersed capacitor.
After the result was produced, the sound was obtained. Different kinds of surprises, human voice, high frequency and delicate, low frequency dive deep and full strength, sound balance is very good. The high-voltage part of the power supply uses 6x4 tubes for bile rectifier + Japanese Putian high-voltage voltage regulator circuit. The 6x4 rectifier tube is slightly better than the domestic 6z4 and Russia's 6u4n in speed, detail and resolution.Japan's Putian high-voltage voltage regulator circuit uses the Japanese position effect tube 2SK1170. As we all know, the FET has the advantages of low output internal resistance, small ripple coefficient, sweet sound, etc. This is the difference between this circuit and other Taobao sellers. One of the highlights of the machine, this circuit has high-voltage delay, anti-boot shock, and can protect the life of the amplified part of the tube. After the voltage regulation, it is even more exciting.
After the voltage regulation, the three-stage RC high voltage (Aerovox, and Italian Italian tower) oil-immersed capacitors are used for filtering to make the voltage more pure. The high-pressure oil-immersed capacitors create a super-toxic human voice, which is delicate and high. Frequency, pure and powerful low frequency, making the sound performance very balanced!The enlarged part is separated by the left and right channels independently. The grounding is reasonably grounded. Many people are worried about the noise of this circult. It is really difficult to overcome. However, the noise of this machine is very good, and it has been debugged very well. Close to the speaker to listen to only a little weak tube thermal noise, I believe that every player who plays the tube can be fully accepted. This machine uses imported capacitors, filter electrolysis for Nichicon, Philips BC, Vishay, etc. For the 0.01uF US imported expensive oil-immersed capacitors, the output uses the Italian AV large-capacity oil-immersed capacitors. The oil-immersed capacitors create super-toxic human voices, delicate high-frequency, pure and powerful low-frequency, making the sound performance very balanced. Power transformer are audio industry expensive R core type, the chassis is all aluminum high-end chassis, large solid aluminum knob, pure copper input and output RCA seat, genuine Japanese alps27 volume potentiometer, Japan original.
The resistance is imported KOA, Panasonic, Vishay, etc. Making the sound more pure and transparent.We also can custom-make the 110V version. Small signal amplifier tube shuguang 12AX7 X2pcs (you also can use 6N4, ECC83, ECC803S, B339, E283CC, M8137, CV492, CV4004, CV8156, 6057, 7729, 7025, 5751, 7058). ECC816J8P 6SJ7,6267, EF86,6201.
Note: the default price are just a finished preamp. Not inlcude any Audio cable and the AC power cable!! Default send by fast express to US, CA. Mexico and most Europe, Asian countries.
(please see the detail describe)[In case of DOA (Dead on Arrival), please report within 3 days]. The item "Special extreme version oil-immersed capacitor 12AX7 +12AT7 tube preamp L13-3" is in sale since Tuesday, January 8, 2019. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "along1986090" and is located in . This item can be shipped worldwide.