High-quality, fully parametric filter modules for api® 500 systems, designed for precise frequency correction during recording, mixing and mastering, as well as effect filters for limiting the frequency range or removing unwanted frequencies.

Vocal-Correction: Annoying ‘top-end’ resonances or sharp ‘s’ sounds in the upper midrange are specifically attenuated using the high-band module.
Surgical Frequency Elimination: Thanks to a 9-position ELMA switch for filter Q (bandwidth), narrow-band resonances can be precisely isolated and attenuated.
Sub-Bass Control: With its continuously variable, pinpoint frequency selection in the low band, the W2377 cleans up the low-end register for kick drums and bass instruments.
Sonic Refinement During Recording: Increases headroom by eliminating intrusive room resonances or structural noise (footfall/vibrations) before the signal reaches the A/D converter.
Proactive Signal Cleaning: Ideally suited for precisely targeting and suppressing problematic room modes or frequency peaks caused by room acoustics.
Flexible Tracking Equalizer: Functions as a low-band filter for bass, a mid-band filter for guitars, or a high-pass filter for vocals during the recording process.
Creative Sound Shaping: Beyond purely corrective tasks, the module serves as a musical program equalizer, designed to tonally enhance and revitalize dull-sounding tracks.