MACTONE

Demonstration of a live concert
A rare line preamplifier that aims to bring the reproduced sound to the closest level.
I am in charge.
It is a gem made by hand and know-how by design method for half a century.
We adopted the world's first circuit system that uses a SEPP system by connecting triodes in parallel together
with a power supply circuit that uses a large-capacity capacitor and a large power transformer with ultra-low i-impedance.

XX-7000 Notable features and playback capability

First of all, it is designed to be extremely equivalent in circuit to the XX-5000 product that was released in advance,
so I would like to compare it.

We have continued to create high quality amplifiers since our establishment, but we are still producing tube type OTL amplifiers,
which are considered to have the best sound quality especially for power amplifiers.

The SEPP system circuit, which is a feature of this OTL system, was adopted for the line preamplifier for the first time in the world.
Through many years of research and development and experimental results, we were able to prove that it can be expected to be
extremely effective in terms of sound quality, and decided to commercialize it.

First of all, when I commercialized it with XX-5000 and tested the audition survey with the equipment of the mania's house, the mania
people who were present were surprised because there was a big difference that could not be compared with the preamplifier made
overseas, which is said to be the best in the world.
There were times when I couldn't forbid it.

Since the internal impedance drops extremely in terms of the circuit, the output impedance drops to the unit of several tens of ohms,
and if it reaches this value without feedback, the influence of the circuit will decrease without slowing down the speed of the amplified electrons.
And the frequency characteristic becomes flat from several ㎐ to several hundred KHz.

The input audio signal is completely lacking and can be reproduced as it is.

It's safe to assume that you've taken a step or two closer to the tone of the live concert playback.

In addition, the power supply section has many years of circuit design know-how, and by working with a high-voltage, large-capacity capacitor
with an excellent S / N ratio, the graininess of each instrument is clearly highlighted.

I struggled to prevent the difference between the XX-7000 and the XX-5000 from having a large effect on sound quality.

The XX-5000 specification vacuum tubes mainly use 12BH7, but the XX-7000 uses all 12AU7.
Moreover, the capacity of a capacitor is changed to an appropriate value.
The circuit has also been partially changed.

The sound quality of the XX-7000 itself is highly complete.

All wiring is made by hand wiring by a specialist, and no printed circuit board that affects sound quality is used.
In addition, an excellent line preamplifier can maintain its role as a control tower for the entire playback system, and even if
the power amplifier, etc. cannot demonstrate its full performance, it can bring out its performance well and change to a
satisfactory sound quality.
I have.