ST552 | Analog Tape Emulator and Harmonic Processor
- Accurately Models Tape Saturation
- Analog Custom Designed Circuitry
- 30/15 IPS Tape Mode
- TAPE DRY/WET Blending
- +/-12dB Input Level Control
- Tape DRIVE LED Meter
- HRK FABRIC Circuit for Extra Harmonics
- RED and BLUE FABRIC Mode
- FABRIC DRY/WET Blending
- Smart Input/Output Level Meter
- Custom HRK Active Transformer Output Stage
- High-Quality ALPS Potentiometers
- Studio-Grade Low Noise Opamps
- Balanced Input
- Compatible with API 500 Format
- Direct Sale – Save on Distributors Fee!
ST552 Review Video - HD Audio
The ST552 is an Analog Tape Emulator dedicated to professional music producers and studio engineers.
The ST5552 accurately emulates the saturation of the Reel-to-Reel studio recorder adding colour and analog harmonics to your music production.
The 30/15 IPS modes are designed to mimic the LF resonance of the tape at the different feed speeds.
The FABRIC circuitry enhances the results produced by the ST552 Tape Emulator adding the harmonics and the final touch to the processed music material.
The ST552 is easy to use, and intuitive controls make tracking, reamping, or mastering a quick and satisfying job.
The FABRIC Harmonics Generator
In addition to the tape emulator, the ST552 is equipped with HRK proprietary FABRIC harmonics generator.
The FABRIC adds the combination of 2nd and 3rd harmonics to enhance the results of the tape emulator circuitry.
The BLUE mode produces transformer-like harmonics and if used in a moderate amount it will add a magic touch to your tracks.
The RED mode is flat and amplifies midrange harmonics producing the tonal response of a mixing desk.
Each mode can be used creatively to achieve unconventional tonal results.
The HRK Active Transformer
Bart Hrk developed the HRK Active Transformer to solve the problems of the conventional passive transformer output.
We all know that the transformers are the source of pleasant harmonics and produce unique audible results. Unfortunately, transformers can also be a cause of many problems.
Passive transformers are susceptible to electromagnetic interferences, and the frequency response depends on load and source impedance, negatively influencing the overall performance of analog studio equipment.
The HRK Active Transformer solves the problems of the passive transformer while preserving and even enhancing the positive trades of the transformer output stage, including the harmonics content and the tonal response.
The HRK Active Transformer delivers the sound we love and removes all the hassles associated with passive transformers.
Our improved production process ensures stereo matching between units.
If you purchase two units in one order, you can ensure that both ST552 are matched for bus processing.
Input Level TRIM
Input Level TRIM allows setting the desired signal level. You can reduce or increase the input signal by -/+12dB.
The TAPE switch Engages the Tape Emulator Circuit.
The DRV Knob sets the saturation level of the Tape Emulator. The level of saturation is visible on the LED DRIVE Meter.
30/15 IPS Switch
30/15 IPS Switch selects the type of the emulated tape. The 15 IPS has more resonance for 60Hz and the 30 IPS has the resonce set for 120Hz.
MIXT Knob sets the amount of blend between the WET tape signal and the DRY input signal
MIXF Knob blends the FABRIC harmonics with the signal from the Tape Emulator.
BLUE FABRIC Mode
BLUE FABRIC Mode adds transformer "air" harmonics after the Tape Emulator and is useful for havier tape saturation settings.
Composite Gloss Finish Front Panel
The ST552 front panel is made with composite materials and covered with a high-quality gloss finish with a dash of chrome pearl.
DRIVE LED Meter
DRIVE LED Meter shows the level of Tape Saturation. The Meter uses an advanced microprocessor metering system to show a precise level of Saturation. The RED LED is ON if the the THD level reaches 5%.
Optimal Saturation Level
LED DRIVE meter helps to set a healthy Saturation level which should stay in a range of Green and Yellow LEDs.
The LED LEVEL Meter
The LED LEVEL Meter is a bi-directional smart level meter which display multiple signal levels.
FABRIC Switch engages the FABRIC circuit that adds extra harmonic content to the signal.
MTR Button selects function of the LEVEL LED Meter. The Meter can monitor the input signal after the DRIVE knob or the total output level from the ST552.
RED FABRIC Mode
RED FABRIC Mode has a midrange response for adding the final touch to the processed signal.
Stereo Mix Demo Video
Drum Machine Demo Video
Bass Guitar Demo Video
Drum Machine Demo Video
Female Vocal Demo Video
Synth Demo Video
|Input Type / Input Impedance||Balnced Electronic||20k|
|Output Type / Output Impedance||Balanced Active Transfomer||Less than 50R|
|Gain||0dB||* Input Trim set to 0dB|
|Max Output Level||+25dBu@0.1%THD||* Balanced Signal|
|Power Consumption||80mA max.|
|Format||API 500 Format|
|Phase Reverse||No||0 deg.|
|Level Meter||Input/Output Smart Meter, Tape Drive Meter||* See User Manual|