Not unlike guitar players demanding tweed Fenders and Marshall Plexis, recording studios and engineers have long deployed high-voltage vacuum tube gear to inject life and dimension into their recordings. Big, heavy tube and transformer-coupled Fairchild 670s, original LA-2As, Pultec equalizers, Neumann M 49s, and even contemporary tube offerings are still used in studios today in spite of more solid state counterparts and digital plugins coming to market. If you're looking for something to give your tracks a little go-go juice and vintage vibe, this handpicked collection is the best place to start.