KSA100MKII 450W+450W Power Amplifier Board Hifi Power Amp Board

KSA100MKII 450W+450W Power Amplifier Board Hifi Power Amp Board

Features:
Feedback capacitor
- Audiophile axial audio capacitor

Quality transistor
- All the transistors are imported
- And the same-level error ≤ 3% precision matching

Board version
- The latest optimized version
- Optimized core circuit parameters

Resistor usage
- Choose 0.25W/0.5W/1W/2W/5W resistors with different powers according to the current

Capacitor quality
- Imported audiophile audio capacitors

Resistor and adjustable potentiometer
- Using military resistors
- Imported gray BI adjustable potentiometer

Bipolar transistor model
- MJE15034/MJE15035 for ON Semiconductor

Protect the circuit
- Midpoint offset, switch squelch
- Over-current and over-temperature protection

Relay to protect speaker
- Adopt imported 30A sealed relay

Independent power supply
- The current and voltage stages can be independently powered

High current terminal
- Upgraded to bigger and stronger terminals

Bipolar transistor heat sink
- Upgrade to a larger plum-shaped heat sink
- Added 7812 regulator heat sink

More Details:
1. The first-stage decoupling capacitor; the output and power terminals are all high-current terminals
2. Bipolar transistor MJ15034/MJ15035 for ON Semiconductor; military resistors are used
3. 30A sealed relay enables larger current. Sealed design ensures that it does not get wet, the contacts are not easily oxidized, its service life is longer, and the performance is more stable
4. Quality feedback capacitors are audiophile capacitors; axial capacitors for Siemens and CBB capacitor for Sprague4. Quality feedback capacitors are audiophile capacitors; axial capacitors for Siemens and CBB capacitor for Sprague
5. Adjustable potentiometer uses original BI gray adjustable potentiometer; the small capacitors are imported capacitors
6. On-board speaker protection circuit with over-current and overheating protection, and without noise when it turns on/off
7. The circuit structure is excellent referring to the circuit for KERLL in the United States, and it is used with premium components to ensure better sound
8. Bipolar transistor MJ15024/MJ15025 for ON Semiconductor, the tubes of the entire board are precisely matched to the same polarity

Specifications:
- Name: KSA100MKII Class A Amplifier Board
- Frequency Response: 20-20KHz
- Signal-to-noise ratio: 100dB
- Output impedance: 4-8Ω
- Total harmonic distortion: ≤ 0.01%
- Output rated power: Class A 100W+100W (4Ω); Class AB 450W+450W (4Ω)
- Quiescent operating current: adjustable
- Signal input method: RCA unbalanced
- Finished board: 280mm (length)*113mm (width behind with heat dissipation guide plate)*45mm (height)
- Speaker protection circuit: with perfect (mute, mid-point offset, over-current, over-temperature) protection circuit during startup/shutdown
- Power supply range: dual DC 32-60V plus AC 12-18V; recommended dual DC 45V plus AC 12V
- Power supply scheme: It is recommended to use two transformers with a capacity of more than 500W to supply power independently for each channel
- Power supply mode: current and voltage levels can be independently powered or current and voltage levels share a set of power supplies
- PCB Dimensions: 280 x 90 x 2mm (LxWxThickness)

Package Included:
- 1 x Amplifier Board
- 1 x Set of Copper Pillars and Screws
- 2 x Temperature Control Tubes
- 1 x User Manual