Description: This board refers to the KRELL KSA100 MKII original circuit diagram, manual analysis of the line layout, integrated computer design, resulting in a very high performance ratio. Works voltage: +/-DC30V-60V （Power transformer recommend Dual AC28-38V. about 500W or more） 0-AC12V (12-18V are alll ok) for speaker protection circuit.about 0.2A is enough. Output power: 80W +80W Class A Undistorted power 500W +500W Class AB. Undistorted power ( If you need the board works at Class AB. please send message to us. default are set at Pure class A.) Output impedance: 4-8 ohms Board size: 368*110*40mm (W*L*H) include the Aluminum plate size This board can use same one group Power for Voltage amplification and Current amplification, also can use independent power supply. When the use independently power, the jumper cap nearly the largest capacitor on the power amplifier board need taken out. Material: 1: This board adopts 2.0mm double panel design, metal film 1% error high precision Taiwanese production of Kunming crude copper foot resistance, load resistance using Nichicon KOA non-inductive power resistors, film capacitor using German WIMA, electrolysis using Japanese ELAN Hiend capacitors, the power Transistor uses a new original MJL4281/4302 . The excitation Transistor and the voltage amplification Transistor are respectively used MJE15034/15035 audio pair Transistor. The whole top material of the board is neatly arranged, the circuit design is reasonable, the sound quality is pure and sweet, and the details are outstanding. The sound is warm and smooth. Dynamic and powerful, 2. On-board integrated speaker protection circuit, the protection circuit is provided separately and does not interfere with each other. The red light of the circuit is on, and the green light is on for 3-5 seconds when the circuit is normal. Circuit activation,maximum carrying power 500W, midpoint potential drift 1V, protection activated. Friendly reminder: Class A amplifiers are different from ordinary amplifiers and are known as small heaters. Due to working in a constant current state, even when the volume is low, the radiator has a high temperature/about 50-60 degrees. So please do not run it without big heatsink. When installing the machine, please use a chassis with exposed heat sinks. Please do not adjust the potentiometer on the board after receiving it. To prevent excessive static current from burning out components. Package include: Assembled amp board with Thermal aluminum plate X 2 boards Note: this board is no schematic available. if you mind this. Please not bid. thanks... Product Description: The KSAI00 produced by Krell in the United States and the previously launched KSA50 are hailed as one of the most beautiful HI-FI amplifiers in the audio industry, while the KSA100 MKII is an improved version of the KSA100. The circuit design of this machine is simple and lively, making it a masterpiece. Circuit Overview: The entire circuit adopts a fully symmetrical push-pull amplification structure. The first stage consists of Q1, Q2, Q3, and Q4, forming a complementary differential amplification. Only two resistors, Rl3 and Rl4, are used as emitter resistors. Following closely the first stage, two pairs of field-effect transistors, Q5, Q6, and Q7 and Q8, are still used for complementary differential amplification, improving the common mode rejection ratio, reducing distortion, and improving temperature stability. The third stage amplification is mainly completed by Q9, Q11, Q10, and Ql2, and Ql3 forms a bias stabilization circuit. The final power output.
Price: 335 USD
Location: FOSHAN
End Time: 2024-01-06T13:23:49.000Z
Shipping Cost: 45 USD
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Item Specifics
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Compatible Brand: Universal
Brand: Unbranded
Type: Board
Country/Region of Manufacture: China
Amplifier Class: A
