The API TranZformer LX bass guitar pedal and DI box uses the company's renowned discrete circuitry and transformer-coupled output to bring the iconic API tone onto your pedalboard. It all starts with a high-headroom input stage hitting a variable compressor based on the feedback mode of the 525 module with six different compression settings. Next down the line is the tone control section, a take on the 553 program equalizer with three bands and center frequencies carefully selected for getting the punchiest bass guitar sounds. Get that fat, electrifying bass sound you've heard on countless records with the API TranZformer LX.