GAINCLONE 3875 LM3875 50W+50W 8ohm Amplifier board+speaker protection
Recommended voltage AC 25-0-25 AC supply
Output power of 50W 8R * 2
Size 132MM * 40 MM

Feature:

The back of the solder joints at the DC short access here to enable the amplifier in the DC amplification, will make the output DC voltage rise.
Needed to set up.
The standard does not connect here, in exchange amplification, capacitive coupling.

Note:doesn't include this two LM3875 ic. This is a kit, need to solder it by yourself.

Package: 

1 x GAINCLONE 3875 50W+50W 8ohm Amplifier board+speaker protection Without LM3875