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Vertex AQ JSA for headphones: VERTEX ON EAR - The Audiophile Man
Normally focused on combatting distortion within a normal hi-fi chain, Vertex AQ has now targeted the popular headphone market. Paul Rigby reviews the JSA The headphone market continues to boom and prosper with headphones (on ear and in-ear), headphone amplifiers and a host of accessories sprouting from the left and right with an ever increasing rapidity. I have to say, though, that this is the first time that I have come across a passive headphone conditioner targeted at both microphony and RFI. The system arrives in two bits. The most substantial part is a sturdy metal box. Inside is an enhanced acoustic absorption labyrinth, solid-core silver conductors and unbleached cotton insulation. You can also buy a cheaper model without the solid core conductors and a standard labyrinth. Similarly, I tested the super jack lead (Type 2) featuring a solid core silver conductor with EMI absorbent tubing but you can also buy a cheaper Type 1 tube with silver-plater copper conductors and PTFE insulation. In action, you plug the jack lead into the JSA and the other end into your headphone amplifier. You then plug your headphones into the JSA. SOUND QUALITY Spinning the Dexter Gordon CD, I Was Doing All …