The function of the tonal pre-stage is to appropriately adjust the timbre of the high, middle and bass of the music to meet the different listening needs of users. It is used to compensate for the recording defects of the sound source or the frequency response of the speaker. The tone is relatively simple to use. For general users, the outstanding characteristics of a certain frequency band of their personal preference for music can be controlled (for example, some customers like more bass, some customers prefer vocal midrange), and the pre-tone can achieve its purpose. .
Most HIFI enthusiasts adhere to the principle of simplicity and supremacy in music, and reduce redundant functional circuits in the music channel to achieve the original listening effect. I also agree with this statement. The problem is if you have a high-end box unit. It makes the high and low frequency response reach an ideal and relatively flat curve, and most people have a box unit that is less than 10,000 yuan, and the grade they have is not up to the high-end box. (At this time, adding a tone is to improve the extension of the high, middle and low frequencies. A shortcut with little investment and quick results) This is also when many users ask why my power amplifier does not have high school bass adjustment when consulting; C300MKII tone preamp comes from this.
This is a front stage that can adjust the three frequency bands of high, middle and low. The panel is equipped with a through switch (high, middle and low adjustment or pure preamp without tuning); the power supply is designed as a class A shunt regulator, and the sound is better than ordinary The 317/337 voltage regulator has several levels, which is also stronger than the low frequency and thickness that the electronic filter voltage regulator does not have; the output is a fully discrete transistor type A buffer (the output impedance is very low, and it can match almost all subsequent stages, combined machines)
The op amp is 5 BB company OPA2604 (produced in South Korea). The op amp is used to adjust the tone. Toshiba field tube 2SK246 is used for amplification; the op amp cannot be replaced by other dual op amps. The circuit design op amp voltage is +-20V Power supply, many other op amps can't reach that high voltage. The circuit specially designed for this op amp has actually been audited for many times to reduce the op amp voltage to +-15V to replace many different op amps, and integrate various aspects of the sense of hearing and other effects. There is no high-voltage OPA2604, and the most expensive one uses the MUSE02 op amp, and there is no advantage; therefore, customers are not recommended to replace the op amp.
Recently, many customers are Tianyi AD2 or 3 customers. The sound quality improvement of the pre-amp with this tone is more obvious. You can buy these two power amplifiers directly. At the same time, I hope that the customers after the purchase can try their best to say about themselves when they are satisfied. The system (what kind of power amplifier, box sound source, etc.) is used for future customers' reference.
1: It can be connected in front of the pure power amplifier to achieve tuning and volume control.
2: It can be connected to the front of the power amplifier of the combined machine.
3: It can be connected in front of the front and rear power amplifiers.
The C300MKII tone is designed as a discrete Class A buffered output, with low output impedance. Connecting to a combined machine or front and rear amplifier with a pre-amp will not have the side effects of the two pre-amps overlapping after the ordinary pre-amp is connected (such as tone loss, easy to overload ), in fact I connected my own E1 combined machine and Gaowen before and after, the sound quality effect is very outstanding, the control of each frequency band of high, middle and low is very obvious and outstanding.
Frequency response: 5Hz-120KHz (+0/-2dB)
Input impedance/sensitivity: 47K/2V
Size: 430*85*340MM
Net weight: 8.5 kg
Signal to noise ratio: 102dB
Harmonic distortion: 0.01%
1: 3 inputs (two single-ended RCA+balanced XLR)
2: Bluetooth 5.0 input
3: 3 outputs (two single-ended RCA+balanced XLR)
4: Power cord socket (including 2A fuse)
Note: No cables are included
Reviews
There are no reviews yet.