MK-9200 Class A Fully Balanced HI-END Pre Amplifier With Tweeter And Bass Adjustment RCA XLR Input Output

The MK-9200 pre power amplifier uses a 65W transformer, and then uses three groups of high-speed commutators+six ten thousand microf super capacitors to form a large pond with abundant water power. This is the fidelity of power. Even listening to the great dynamic of symphony, it will not be soft. Then it uses a high-performance voltage stabilizing circuit. Our circuit comes from the former stage of Lux, which is at the level of 100000 yuan. It can be directly reproduced. The effect is unknown, and a group of electronic filters are added later, The ripple of the power supply is clean, which can make the music background cleaner, the sound transparent, natural and open. This is our power system, a powerful heart

What is an RCA (single ended) amplifier? What is a fully balanced amplifier? How to distinguish? Take a sound channel as an example:

RCA (single ended) amplifier means that the signal comes in, enters an amplification program completed by an amplification circuit, and then the signal is output to the power amplifier. The efficiency is very low.

The balanced amplifier needs two identical amplification circuits to complete the positive and negative amplification program, so the parts are twice as many as the RCA amplifier, which is not the key point. The key point is that the pipes of the parts are doubled, and the matching difficulty of the pipes is increased several times. This is certainly not 1+1=2, which is far greater than 2, but the benefits obtained are also multiplied. Since balanced transmission requires special balance lines, the signal loss will be much smaller than RCA, Especially in terms of small signal details, the sound density and dynamics are also far better than RCA input, which is determined by the balanced amplification circuit, because the power utilization of balanced amplification is 4 times (theoretical value) of RCA, and the sound dynamics are far better than RCA.

So how to distinguish between true balanced output and non balanced output is very simple. You can see if it has two identical amplification boards for one channel output, and stereo should have four amplification boards, which is simple and clear.

At present, many pre outputs, including CD player and decoder RCA outputs and balanced outputs, share the same amplifier board. This is a bad practice. We all know that balanced output requires two amplifier arms for amplification. If the output of one bridge arm is 1V, then the total voltage signal to the power amplifier is 2V. If the RCA output is pulled from one of the positive or negative bridge arms for output, then its output voltage to the power amplifier is 1V, This obviously reflects that the sound on the speaker is half lighter, which will cause two problems. One is that the sound quality becomes worse. The other is that if you connect both sets of outputs to the power amplifier, you will feel very uncomfortable when switching between the RCA sound and the balanced sound, so you don't want to listen at all. Because the RCA sound is half lighter at the same volume, how can you listen to it? You even start to wonder if there is something wrong with the previous level? Is there a problem with the amplifier? Why don't you suspect that the CD player or decoder is not standard? They have problems.

In order to solve this problem, our MK-9200 Class A front stage has independent amplification boards for RCA output and balanced output, and the output volume (level) is the same. This requires two more amplification boards, and the cost is twice that of similar machines. Therefore, our machines are meticulous and strive for perfection, and every detail can stand scrutiny,

Parameters:

Frequency characteristic: 20Hz~20KHz (+0 – 0.1db)

3Hz ~ 150KHz (+0 -3db)

Full band distortion: 0.002%

Input sensitivity: 250mV/40K (balanced) 250mV/20K (RCA)

Rated input level: 2V (audio signal)

Rated output level: 2V/50 Ω (audio signal)

Maximum output level: 12V (audio signal)

Treble adjustment: 3KHz+- 10dB (20KHz)

Bass adjustment: 300Hz+- 10dB (50Hz)

Signal to noise ratio: 107db

Minimum load impedance: 600 ohms

Power supply: AC-220V 50/60 Hz

Boundary dimension: 430mm (width) × 330mm (depth) × 108mm (height) (excluding machine feet)

Weight: 9kg, with package of 11kg.