The SPL Stereo Vitalizer Mk2-T is based on findings of psychoacoustics and audiometry. Its filter network is one of the few patented filters. It makes the richness of detail of audio signals more audible. Interventions in the sound image are more of a musical nature. Music productions sound more natural, lively, differentiated, easier to understand, more deeply layered and more widely spread apart.
A key feature of the SPL Stereo Vitalizer Mk2-T is the unmasking of superimposed sound components. The SPL Stereo Vitalizer Mk2-T thereby relates the time of perception of a frequency to its amplitude. Through a minimal temporal offset of loud frequencies, quieter, previously superimposed sound components are “de-masked” and thus become audible.
The non-linear sensitivity of the human hearing is described already in the 1930s by the “Fletcher-Munson curves”. These “curves of equal loudness” (today defined by the standard ISO 226:2003) illustrate the equal perception of loudness as a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones.
The SPL Stereo Vitalizer Mk2-T adapts the frequency spectrum to the curves of equal loudness, which improves the loudness perception in particular. The two channels of the SPL Stereo Vitalizer Mk2-T are equipped with Neutrik XLR sockets and jack sockets connected in parallel. The signal transmission is electronically balanced with a nominal level of +6 dB.