Description: Power amplifier board basic parameters: Works voltage: +/-30V-60V DC Auxiliary voltage: AC12V 0.2A Output power: Class A 50W + 50W without distortion Power Class AB 250W + 250W without loss of power Output impedance: 4-8 ohms PCB size: 261 * 58.5mm (L*W) not include the power transistor Size. Speaker protection basic parameters: Using the original OMRON silver contact relay, reliable contact 7812 power supply, more stable performance. Through the circuit red light, the circuit normal 3-5 seconds green light. Circuit start, Maximum load power 400W, the midpoint of the potential drift 1V, protection start. Recommended transformer parameters: dual 28-38V AC power about 500W. Circuit board label symbol wiring instructions: VC + connect the power supply positive VC- connect power supply negative GND to power ground IN signal input OUT speaker + AC 12V protection power supply 12V AC (VA+ GND VA- is the Voltage drive level. this board default has connect parallel with the Current amplification level. so it default no need connect. if you want using the Voltage drive level with Independent power supply. Remove D101 D102. and VA+ GND VA- connect +/-DC32V will be ok) 1: The board using 2.0 mm double panel design, metal film 1% error high precision Japan KOA imports thick copper feet resistance, capacitance using Japan ELAN and fever capacitor, power amplifier board with new original Toshiba (2SA1943 and 2SA5200) . , components arranged rectifier, the circuit design is reasonable, the sound quality is pure and sweet, the details of outstanding performance. The sound is warm and smooth. Dynamic strong, suitable for 4-8ohm bookcase box use. 2. Board integrated speaker protection circuit, the protection circuit alone for each other, do not interfere with each other Package include: Assembled KRELL KSA50 Class A Power amplifier board X 2 Signal input X 1 (can cut as two for 2 channel boards) Insulation sheet+ Insulation cap+ Connector X 1 set When V1 voltage adjust less 25mV, the board will work at class AB. more than 25mV. the board will works at Class A. On Jun 16, 2022 at 07:42:16 PDT, seller added the following information:
Price: 95 USD
Location: FOSHAN
End Time: 2024-12-16T15:37:13.000Z
Shipping Cost: 18 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 or replacement (buyer's choice)
Return policy details:
Country/Region of Manufacture: China
Compatible Brand: Universal
Type: board
Brand: Unbranded
