STK4191 Dual 50W + 50W Stereo Power Amplifier with NE4558 Pre-Amplifier DIY Kit

Components Kit + Generic STK IC + PCB


The STK41XX II Series is a Hybrid Amplifier IC by Sanyo. The Series consists of 10 ICs ranging power output from 12W to 100W. All ICs in the series share the same circuit and pin out so you can just select any IC respective to your power requirement and put it to the circuit without changing any other component. STK 41XX II series can produce high power output up to 50 watts per channel. The circuit has a Built-in Pre-Amplifier Powered by NE5532 and Tone Controller circuit. You can adjust Volume, Balance, Bass and Treble using the Tone Controller. This kit includes all the components for the amplifier circuit and an Instructions for assembling and testing the circuit.


Features of the circuit

  1. Professionally Designed PCB for the Best Quality Output and Stability.
  2. Designed to Minimize the Noise and for Maximum Power output.
  3. Assembly Guide is included in the kit.
  4. Easy to assemble no need an expert knowledge.
  5. Quality Pre-Amplifier fully compatible with both 4558 and NE5532 op amp ICs
  6. Bass, Treble, Tone controller with Balance and Volume controllers
  7. 100% Tested for Quality and Stability.
  8. PCB is Compatible with range of STK amplifier ICs.

Printed Circuit Board (PCB) Specifications

  1. Dimensions - 200mm x 75mm
  2. Thickness - 1.6mm
  3. Material - Bakelite epoxy
  4. Solder mask - none
  5. Anti-Oxidation Rosin Coat
  6. Manufacturer - CAD PCB
  7. Made in Sri Lanka.

You will get every component required to assemble the amplifier. (Speakers and heatsink Not Included) 

Since they are large and due to packing process, 4700uF capacitors may have faint scratches and dents on their surface. It will only affect appearance.


"STK IC is a Generic made product"

The STK IC (Integrated Circuit)

This board is Compatible with 10 types of STK 41XX series amplifier ICs. You can choose the STK IC for desired Power and the supply Voltage in the chart below


Example: If you want to build a 100W amplifier, you should choose STK4191II and the supply voltage should be +/-35V (or 28V-0V-28V center tapped Transformer) Please Let me know which STK IC you need by adding a "note to seller" or sending me a message. If no choice has been made, STK4191 II (100W) will be sent by default.

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Package Include 

  • PCB Board  x 01 
  • Component KIT x 01 
  • STK IC x 01 
  • Instruction Manual x 01 

(NO Retail Box. Packed Safely in Bubble Bag)