One Pair Pure Class A Amp Board Base KRELL KSA50 50W*2 MJ15024/15025 or ON MJL4281 / MJL4302
Product details:
Adopt 2.0 mm double panel design, metal film 1% error high precision Taiwan's Kunming blister copper foot resistance, load resistance using Nissan KOA non-inductive power resistance,
film capacitance using Germany Weimar WIMA, electrolysis using Japan ELAN and Nikon or Panasonic fever Capacitance,
power transistor with brand new original ON Semiconductor audio transistor (MJ15025 and MJ15024) per channel 3 pairs . Excitation transistor and voltage amplifier transistor respectively (MJE15035/15034 and MJE15033/15032) audio transistor
The board as a whole top-level materials, components arranged neatly, circuit design is reasonable, pure and sweet sound quality, outstanding performance.
The sound is warm and smooth. Dynamic and powerful,
Integrated speaker protection circuit on board, protection circuit using Separate voltage, without disturbing each other.
parameters:
Amplifier board input voltage: +/-30V-60V DC
（this board the Voltage level and Current level power can Separate supply, also can share one group voltage, the default will set share onegroup voltage. if you needit with Separate supply, please let me know. it is also easy tomodify it on board buyerself)
Output power: Class A 50W+50W undistorted power
Class B 350W+350W undistorted power output.
Output Impedance: 4-8ohm
Speaker protection basic parameters
Using the original Omron Silver contact relay, reliable contact
7812 regulator power supply, more stable performance.
Supply voltage: AC12-18V 0.2A 3W
The red light of the circuit is on and the green light is on for 3-5 seconds. The circuit starts,
Maximum load power 500W, midpoint potential drift 1V, protection start.
Recommended transformer parameters:dual AC28-38V output power (500W or more)
Each board Size: 300*110*40mm (L*W*H) (withAluminumPlate size)
The price is for 2 channel Assembled amp board (with Aluminum Plate）
package include:
Assembled amp board X 2 channle include the black heatsink
Audio input cable X 1 ( need cut off for 2 boards)
There are two version ,According to the power tube is different ，order pls pay attention！thanks
version A : ON MJ15025 / MJ15024 Metal encapsulated transistor
version B : ON MJL4281 / MJL4302 Plastic encapsulated transistor
