30w*2 Replica Accuphase E550 Class A Power Amplifier High Power Sound Sweet Vu Meter Toshiba Transistor HIFI Audio Amplifier

Sound characteristics:

    The voice is exquisite, the voice is sweet, has the gall taste, and the sound field is wide. The bass dive is deep and powerful, and the bass effect is not as soft as that of ordinary field tube power amplifier.

Product introduction:
1: This circuit uses the subsequent circuit of the Accuphase E-550 Class A power amplifier. The biggest advantage of the Accuphase E-550 is the description of the sound details and strength. For Class A amplifiers, the sound is soft and sweet, basically the same as that of Class A power amplifiers on the market. Although it is 30W at 8W and 60W at 4W, the thrust is quite large, which is equivalent to the power of 250W at 8W of Class A and B, and can promote the box with 30-250W channels on the market, However, the timbre is much warmer and more lubricated than that of Class A and B, which is the biggest feature of this machine.

2: E550 circuit loop feedback is a current feedback type, with good dynamic response and low frequency depth. The circuit is equipped with a DC servo circuit.

3: Each dual channel uses a separate 500W transformer, and the whole machine is a 1000W large energy source. The dual channel uses 10000UF 63V ELNA imported capacitor 80000UF filter capacitor.

4: With soft start protection and horn protection, it can effectively protect the performance of power amplifier and improve the stability and service life of the whole machine.

5: Each channel adopts four pairs of Japanese classic Toshiba transistors 2SC5200 2SA1943

6: The method adopted by each mono amplification circuit of E-550 is to simultaneously distribute audio signals to two fully symmetrical differential circuits (the double diamond differential amplification circuit commonly used by Golden Voice), both of which receive current feedback signals, and then overlap the signals at the output ends of the two differential amplification circuits and transmit them to the push tube to push the final tube for amplification through the common base amplification circuit.

7: The signal processing of the post amplifier circuit is similar to that of the balanced parallel signal with differential amplification, which enables the circuit to have a high common mode rejection ratio to achieve the goal of low distortion and low noise.

8: The last stage power tube complements the push-pull source stage output. This pair of tubes has low threshold voltage and internal resistance, good linearity, and a voice color similar to that of the gallbladder. It does not have the feeling of procrastination of the gallbladder. This tube has always been the favorite of enthusiasts.

Parameters:
Output power: 30W+30W (impedance 8 Class A, thrust equivalent to Class A and Class B 250W, can be connected to 30-250W speakers)
Input interface: dual channel imported pure copper gold-plated RCA socket
Output interface: dual channel anti oxidation crystal large terminal
SNR: up to 120DB (error 0.02%, ear close to speaker without noise)
Resolution: up to 99DB (error 0.05%)
Frequency response: full frequency 20HZ -- 20KHZ (covering all frequency bands)
Size: 430*130*315MM (width*high*Deep)
Weight: about 19KG