PSI Audio A21-M Active Mid-Field Studio Monitor, Red JL Cooper Electronics Its innovative “cascading” tube preamp

Its innovative “cascading” tube preamp offered multiple stages of gain that introduced guitarists to a world of near infinite sustain and aggressive crunch separate from volume that simply didn't exist before

Your bass guitar is an important investment

Use in conjuctiong with the ATLAS Mount Bracket to mount cowbell securely to your bass drum or other ATLAS accesories

Drum Workshop's heavy-duty 9000 Series drum hardware continues to set the standard for strength and flexibility

Seymour Duncan Pickup Booster Pedal

PSI Audio A21-M Active Mid-Field Studio Monitor, Red JL Cooper Electronics Its innovative “cascading” tube preampWhy PSI Audio Our goal has always been to achieve perfection based on science, technology, know how and experience. This can only be driven by people who have a real passion for what they do. Perfection is always at the top of our mind. When we develop a product, we only release it when we feet we have achieved perfection with no compromise anywhere. A21 M The A21 M is the largest 2 way studio monitor of our range with more low end and SPL than the