SPL Stereo Vitalizer Mk2-T Program Equalizer

SPL Stereo Vitalizer Mk2-T Program Equalizer SPL Stereo Vitalizer Mk2-T Program Equalizer
SPL Stereo Vitalizer Mk2-T Program Equalizer
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Stereo Vitalizer Mk2-T
Program Equalizer. Patented. Legendary.

The patented Vitalizer circuitry makes the Mk2-T an unsurpassed sound designer. Whether live or in the studio, audio productions sound more alive, have more details, more transparency, a higher perceived loudness and, if required, an overwhelming bass foundation.

The Vitalizer 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.


These are the five controls of the Vitalizer core circuit.

Drive controls the level going into the filter network. The bass emphasizes a soft or hard tone and the compressor catches level peaks.

Mid-Hi Tune sets the frequency of operation above which frequencies are boosted and below which frequencies are cut.

Process Level adjusts the intensity of Mid-Hi Tune and bass.

In addition to the Vitalizer core circuit, the Stereo Vitalizer Mk2-T features a high frequency and harmonics stage with coil filters (LC) and a stereo expander to broaden the stereo image.

The De-Masking

A key feature of the Vitalizer is the unmasking of superimposed sound components. The Vitalizer 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 Adaptation to Curves of Equal Loudness

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 Vitalizer adapts the frequency spectrum to the curves of equal loudness, which improves the loudness perception in particular.

Inputs & Outputs

The two channels of the 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.


  • Analog inputs & outputs; XLR & TRS Jack (balanced)
    • Maximum input gain: 22 dBu
    • Input impedance: 22 kΩ
    • Output impedance: 600 Ω
    • Common mode rejection (1 kHz): 85 dB
    • Frequency range (-3dB): 10 Hz – 100 kHz
    • THD + N (0 dBu, 10 Hz – 22 kHz): 0.0019 %
    • Noise (A-weighted): -99 dBu
    • Dynamic range: 121 dB
  • Internal Linear Power Supply with Toroidal Transformer
    • Operating voltage for analog audio: +/- 15 V
    • Operating voltage for relays and LEDs: +12 V
  • Mains Power Supply
    • Mains voltage (selectable): 230 V AC / 50; 115 V AC / 60 Hz
    • Fuse for 230 V: T 315 mA
    • Fuse for 115 V: T 630 mA
    • Power consumption: max. 20 W
  • Dimensions & Weight
    • W x H x D (width x height x depth)
      • 482 x 44 x 237 mm
      • 19 x 1.73 x 9.33 inch
    • Unit weight
      • 3.4 kg
      • 7.5 lbs
More Information
Condition New
UPC 4260149320568
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