KSA100MKII 450W+450W Class A Hifi Amplifier Board Power Amp Board Assembled for Audiophiles

KSA100MKII 450W+450W Class A Hifi Amplifier Board Power Amp Board Assembled for Audiophiles

Features:
- Class A power amplifier board
- Warm timbre, delicate sound and excellent low, medium and high-frequency sound
- Audiophile excellent circuits and high-quality components after many years of optimization, strict quality control. Before shipment, components have been debugged and tested
- Class A board: The sound is warm and enduring. The high-frequency sound is slender and penetrating, the middle-frequency sound is sweet and natural, and the low-frequency sound is both vibrant and elastic and dynamic
- Amazing power: The output of mono class A is 100W, which is equivalent to the thrust of 450 watt-hours of class A and B power amplifiers. It can meet the needs of household bookshelf speakers and large floor speakers requiring higher power
- Strong stability: The board on sale is a version that has undergone many parameter adjustments and PCB optimization. At the same time, we strictly select the components and controls the production quality. Thus, the board has stronger stability
- The whole board adopts imported transistors and they are precisely paired with error smaller than 3%
- According to the current, 0.25W/0.5W/1W/2W/5W resistors of different powers are used
- Imported audiophile audio capacitors
- The current and voltage stages can be powered independently
- Upgraded to 9.5MM large terminals
- The first stage decoupling capacitor. The output and power terminals are high-current terminals
- Original MJ15034/35 bipolar transistor for Onsemi
- Using 718 military grade resistors
- 30A sealing relay with higher current, sealed without moisture. Contacts are not easy to oxidize, with longer service life and more stable performance
- Feedback capacitors are all audiophile-grade capacitors: axial capacitors for Siemens and CBB capacitor for Sprague
- Original adjustable potentiometer and small imported capacitors
- The board comes with perfect speaker protection. The circuit comes with power-on, power-off noise suppression and over-current and over-temperature protection
- Excellent circuit structure is referred to the American circuit for KERLL
- Original power transistors MJ15024/25 for Onsemi are used. The transistors of the entire board are precisely paired with the same pole

Power supplies:
- The main circuit supply is positive and negative 38-60V/7.6A. The speaker protection circuit is powered by a single AC 10-17V/1A.
- It is recommended to have a filter capacity of 60,000μF per channel, and be independently powered by two 500W dual 32V plus 12V transformers. Dual AC 32V is dual DC 45V (32*1.414 times) after rectification filtering. Single AC 12V is used for speaker protection circuits, and recommended current is 1A.

Specifications:
- Item name: KSA100MKII Class A Gold Seal Power Amplifier Board
- Frequency response: 20-20KHZ
- Signal-to-noise ratio: 100dB
- Output power: Class A 100W+100W (4Ω); Class A and B 450W+450W (4Ω)
- Output impedance: 4-8Ω
- Power supply range: dual DC 32-60V plus AC 12-18V (recommended dual DC 45V plus AC 12V)
- Total harmonic distortion: ≤0.007%
- Board of finished board: 280 x 113 x 45mm/11 x 4.4 x 1.8" (LxWxH) (including the width of the thermal guide)

Package Included:
- 2 x Power Amp Boards