Based on a tried, tested and reliable design using 2N3055 transistors. Relay soft start delay circuitry and current limiting for loudspeaker protection. Easy bias adjustment with the help of two LEDs.
The circuit consists of two separate class AB amplifiers that can provide a STEREO output of up to 100 Watts RMS @ 4 Ohms (70W @ 8 Ohms) per channel.
By simply adding a jumper to the board you can turn it into a MONO output of up to 200W @ 4 Ohms (140W @ 8 Ohms).
Includes all board mounted components, large pre-drilled heatsink and kit version has solder for assembly.Specifications
|Input Voltage||±36Vdc/8A symmetrical power supply (see kit 1209)|
|Output Power||1 x 200 Watts RMS (4 Ohms, mono output)|
1 x 140 Watts RMS (8 Ohms, mono output)
2 x 100 Watts RMS (4 Ohms, stereo output)
2 x 70 Watts RMS (8 Ohms, stereo output)
|Input Sensitivity||1V RMS|
|Input Resistance||47K Ohm|
|Frequency Response||10Hz - 60KHz (-3dB)|
|Dumping Factor||>100 (500Hz)|
|Voltage Gain||21 times|
|THD||<0.01% (full power with load)|
|Board Dimensions||~ 140 x 165mm|
|Weight||~ 450 grams|
|Board Connections||Solder Posts|
|Product Formats||SELF-ASSEMBLY Electronic Kit (KT) or|
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info
|Documentation||1199 Schematic & Connection Diagrams|
Amplifier Power Supply General Advice