One pair assembeld 80W+80W Class A power amp board bare on KRELL KSA-100 L12-44

Description

This board refers to the KRELL KSA-MKII original circuit diagram, manual analysis of the line layout, integrated computer design, resulting in a very high performance ratio.
Works voltage: +/-DC30V-60V
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:  385*115*45mm (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 Nissan KOA non-inductive power resistor, film capacitor using German Weimar WIMA, electrolysis using Japanese ELAN and
Nikon or Panasonic fever capacitors, the power
Transistor
uses a new original ON (MJ15025 and MJ15024 ) .
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.
Note: The Class A power amp
Power
Transistor
Very hot. please muse add a enough big heatsink then can power on it. too samll heatsink may be will lead the board burnt!!!
package include:
Assembled
amp board with
Thermal aluminum plate
X 2 channel board
Audio input cable    X 1  ( need cut off for 2 boards)
Power cable Connecting accessories + screws  X 1set
Shipping time:
Default send by airmail,about 15-22 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 address
Customs & 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 laws
Return & 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 at the item's price ( excluding the shipping costs to and from )