SUQIYA-PRT07B-12AX7 Tube Preamplifier Hi-Fi Amplifier Preamp Tube Pre Amplificador Reference Marantz 7 Circuit

product description

A legendary classic machine-Marantz 7 tube preamplifier, the sound quality is famous for its mellow, sweet and natural mid-frequency, and strong tube taste!

For the players who started with tube preamps, most of the preamps considered are the three-piece entry set for legendary new players (M7, SRPP, Matisse). The comparison of the three is undoubtedly a lot of M7 wins.
It is said that the M7 only has a good intermediate frequency, but it is actually wrong. The carefully adjusted M7 is very comprehensive and dynamic. The vocals are natural and delicate, the strings are smooth, stretched, and the positioning image is great. The high and low frequencies extend into place, and the low frequency dives deep and powerfully without lack of flexibility.

The circuit of our works is derived from the classic M7 circuit, and the necessary modifications and adjustments are made according to the characteristics of modern components (mainly coupling capacitors) and old antique capacitors.

Many people are unable to eliminate the noise floor of the tube preamp, which is very annoying. With our own strength, reasonable layout and wiring, and one-point grounding, this tube preamp product has no annoying noise and is very quiet.

There are a lot of electronic tube preamps on the Internet, their design is not too reasonable, the main performance is that the distance between the electronic tubes is too close, we recommend that the distance between the central point of the electronic tube is greater than 40MM

This version is relatively loose to listen to, and the softness of the low frequency is better than that of our store's PRT07A, and it is a grade better than the complete Marantz 7 of the exposed tube.
New 2020 features: the addition of a remote control, 4 sets of RCA inputs, provides players with a variety of choices, very convenient!
(1) The high-voltage circuit adopts the Japanese low field type voltage stabilizing circuit 2SK2700 field effect tube voltage regulator, which has the advantages of very stable voltage, small ripple factor, low output internal resistance, high voltage power supply delay (protection tube life, anti-switching machine impact and other advantages) ), the power supply is the heart of the tube preamplifier, the key to a good sound!
(2) Filament power supply: the use of the Linear Technology LT1085CP high current power supply, which is very familiar to everyone, has the advantages of high current and stable voltage!
This machine has a very high signal-to-noise ratio, which is very rare for the electronic preamplifier. No noise can be heard within 1 meter, because the tube preamplifier will have a little thermal noise. At present, there is no seller who can achieve no noise at all. Unlike a stone machine, it can be as quiet as the deep sea, and you can't hear it when you put your ears on the speaker. I think that the noise of this machine is very good. If you can't even accept this noise, you don't need to play the tube preamp. Too.

Detailed parameters

The magnification of this machine is about 13 times
Luxury all-aluminum chassis, input and output are RCA gold-plated sockets, volume potentiometer is genuine alps27 type 50K

Product Size

Overall size:360mmX92mmX308mm (excluding protrusions)

Precautions

This product does not include AC input cable

The list of goods

SHUGUANG 12AX7B Tube Version:PRT07B Marantz 7 preamplifier X1 Contains 3PCS shuguang tube Matching remote control (no battery)

PSVANE ECC83 Tube Version:PRT07B Marantz 7 Preamplifier X1 Contains 3PCS PSVANE ECC83 tube Matching remote control (no battery)

EH 12AX7 Tube Version:PRT07B Marantz 7 Preamplifier X1 Contains 3PCS EH 12AX7 tube Matching remote control (no battery)

Without Tube Version:PRT07B Marantz 7 Preamplifier X1 Contains Without tube Matching remote control (no battery)