STK4241mk2
Limited Edition

The STK4241mk2 is a 2-channel Thick Film Hybrid power amplifier module by Sanyo. The entire amplifier is contained inside the flat pack. The advantage of this technology is ease of manufacturing. Simply solder a few resistors and capacitors and the power amplifier will be up and running. No oscilloscopes and signal generators are required. This makes it ideal for DIY.

Although Sanyo datasheet states the STK4241mk2 is capable of 120W+120W into 8Ω, albeit at THD=0.4%, AmpsLab feels this is pushing the envelope because it doesn't address 4Ω loading. We have derated the power output accordingly so that 4Ω speakers can be driven properly.

10kHz Full Power into 8Ω
10kHz Square Wave into 8Ω

STK4241mk2 Specifications per Channel

Power Output = 100W into 4Ω | 66W into 8Ω
Input Sensitivity (@ 1kHz before Clip) = 0.77V RMS
Input Impedance = 33K
Rise Time = 2.4us at 10kHz Sq into 8Ω
Voltage Gain = 30dB

Power Supply
Power transformer = 30-0-30Vac
Supply Rails = +/- 42Vdc

PCB = 4" X 2.3" (102mm x 59mm)
Double Sided | FR4

The STK4241mk2 is two channels and is supplied Unassembled.

To complete the amplifier, the following are needed
1) a power supply consisting of a power transformer, filter capacitors and a bridge rectifier
2) a heatsink for the STK4241mk2 module
3) a metal case and the necessary connectors

STK4241mk2 Kit
US$ 92.50

STK4241mk2 Pcb
US$ 32.50

$40 Minimum Order on Check Out
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