Surge protector without line conditioner

Hey Guys 
I have a 300 watt krell class A amplifier. There was a short and they are replacing the transformer.

Anyways, Krell told me I can use a surge protector but make sure it is not a line conditioner.

Any recommendations for a surge protector since most the best one have line conditioners?Plus I have no intention in spending more for a surge protector than the amplifier is worth.

 I appreciate the help.

thanks