Thermal Protection,Bass and treble boost,gold plated connectors.

Power and ground connections are too small,bulkey construction gets too hot too fast.

This is a AB class amp it is not the best amp out there but for a PYRAMID and since I only got it for $40 USD it's not that bad of a Amp.Do not run this amp at 2 ohms run at 4 or 8 cause at 2ohms gets super hot!and will prob fry your subs or amp....

none

everything

this is the worst amp i have ever heard in my life. i bought it from a crackhead and it was supposed to be a sony x. i would have took that over this thoing any day

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nothing can be as bad as this amp