I use a pair of quality ear defenders with some short sections of 5/16 copper pipe arraldited in.

These are then connected with some air line pipe and a Y piece to a longer piece of copper pipe that has the end flattened.

A hole is then drilled in this and is bolted to the engine block.

Work a treat and det can be clearly heard. The better quality ear defenders you buy, the more out side noise will be blocked out and the easier it will be to hear the det. I use a set of Peltor ones.


Gameboy..... thats an innovate LM1, best affordable wide band you can get, i reckon.