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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 * 60 * 50mm L*W*H)
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 Nichicon capacitors, 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 speaker.
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 channel.
Audio input wires X 1 (need cut for 2 boards)
Shipping time:Default send by express delivery,about 7-15 business days can arrive most of europe countries, Russia, Brazil,Africa.Ukraine and some other remote countries will need some more days.If you need it urgently,also can contact us for adding money using a faster courier(EMS,DHL,UPS or courier you designated)Payment:We ONLY accept PayPal. Payment must be made within 3 days of the auction end time. Non-Paying bidders will be reported.All items will be shipped within 1-3 business days (from china)upon receipt of payment.We ONLY send item to buyer’s registered Paypal address,Buyer must be responsible for their postal addressCustoms & duties:For cross-border transactions,.we are not responsible for tariffs and duties. However, buyers may be responsible for actual, applicable tariffs, and duties as requested by respective country lawsReturn & Exchange:>> Some items return is accepted within 7 days after the buyer’s receiving the item.(please see the detail describe)[In case of DOA (Dead on Arrival), please report within 3 days]>> Returned item has to be new, unworn and in its original condition.
>> After getting the returned item, we will refund the customer payment.
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Category: Sound and Vision:Home Audio and HiFi Separates:Amplifiers and Pre-Amps
Location: GUANGZHOU