This is great HiFi audio amplifier for any application, Preassembled and tested. The powerful pair of output transistors (2sc5200/2sa1943) are capable to deliver great power with very low THD both on 8 or 4ohm loads. These transistors are produced for audio applications only. The same pair of transistors are used in power amplifiers built from the brands: Crest, Peavey, Behringer, Crown...

• As it is said above, you'll receive Preassembled and tested board (one channel only,). This board needs symmetrical power supply with +-55VDC (it can work with lower voltages but in that case, the Amp will deliver less power).
• Heat Sink is NOT included in this offer.

The few things that you should do by your own are:

• Putting a heatsink on the output transistors (2SC5200/2SA1943) and prestage transistors (2SC4793/2SA1837), NOTE: both output transistors must be electrically insulated from the heat sink with pads. It is highly recommended these two pairs to be on one same heatsink for stability. Use thermal compound too.
• Connect the Speaker on "SPK" pad for the positive and the negative one connect it directly on the GND of the power supply!!!
• Connect the symmetrical power supply (+-55V DC and GND) and audio signal from your phone or PC.

Our team hopes that you will enjoy in this product. Have fun building your own Audio Amplifier!