zł1,243
- Mix & Match HRK 500 Products!
| 500 Units | 2 | 4 | 6+ |
| Discount | -10% | -15% | -20% |
- Free Shipping for Orders $299+
- Handmade in HRK Workshop
- Fully Assembled and Tested
- Express Delivery to Europe │ USA │ UK │ Canada
Best Selling Product
Almost Always on Pre-Order
- Analog Custom Designed Circuitry
- 30/15 IPS Tape Mode
- TAPE DRY/WET Blending
- Tape DRIVE LED Meter
- HRK FABRIC Circuit for Extra Harmonics
- RED and BLUE FABRIC Mode
- FABRIC DRY/WET Blending
- Custom HRK Active Transformer Output
- Custom HRK Active Transformer Output Stage
- High-Quality Audio Potentiometers
- Studio-Grade Low Noise Opamps
- Balanced Input and Output
- Compatible with API 500 Format
- Direct Sale - Save on Distributors Fee!
ST552 Review Video – HD Audio
Server hosted video – no YouTube sound compression and normalisation.
Stereo Buss Operation
- Our improved production process ensures stereo matching between units
- If you purchase two units in one order, both units are matched for stereo operation, bus processing and mastering.
ST552 vs RND 542 Tape Emulator | 1:1 Comparison Video – HD Audio
Server hosted video – no YouTube sound compression and normalisation.
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.
ST552 vs RND 542 Tape Emulator | Comparison Video – HD Audio
Server hosted video – no YouTube sound compression and normalisation.
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HRK Active Transformer
Bart Hrk developed the propitiatory design of an Active Transformer to solve the problems of the common passive transformers.
Passive transformers are susceptible to electromagnetic interference (50Hz Hum, RF Smog) and the frequency response is dependent on load and source impedance, negatively influencing the overall performance of analogue 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 that we love, including the harmonics content and the tonal response, and removes all the hassles associated with passive transformers.
The Active Transformer produces a subtle “Air” effect and provides extended LF performance.
The Active Transfomer saturation depends on the output level. Higher output signal levels will saturate the Active Transfomer more, like in the classic studio equipment.
ST552 vs RND 542 Tape Emulator | User Review Video – HD Audio
Server hosted video – no YouTube sound compression and normalisation.
ST552 Signal Flow Diagram
ST552 Demo Videos
| Basic Specification | ||
| Input Type / Input Impedance | Balanced Electronic | 20k |
| Output Type / Output Impedance | Balanced HRK Active Transformer | Less than 10R |
| Gain | 0dB | Input Trim set to 0dB |
| Max Output Level | +25dBu@0.1%THD | Balanced Signal |
| Power Consumption | 50mA max. | |
| Format | API 500 Format | |
| Phase Reverse | No | 0 deg. |
| Static Noise | -95dBu@10Hz-22kHz | Tape and Fabric Disengaged |
| Level Meter | Input/Output Smart Meter, Tape Drive Meter |
ALL HRK Products Are Brand New - Assembled and Fully Tested
All HRK Products are tested with the industry best audio measuring equipment
Audio Precision System
- Our improved production process ensures stereo matching between units.
- If you purchase two units in one order, you can be sure that both units are matched for stereo operation, bus processing and mastering.
All Items are dispatched from Poland in the European Union within 1-3 working days.
| Country / Region | Shipping Cost | Customs Fee | VAT |
| All 27 European Union Countries Delivery Time: 2-7 Days | – 14.99USD for orders below 299USD- FREE shipping for orders over 299USD | NO Customs Fees | – Yes, for personal orders- Not charged with the EU VAT number |
| United Kingdom Delivery Time: 3-7 Days | – 14.99USD for orders below 299USD- FREE shipping for orders over 299USD | NO Customs Fees | No VAT charge. HMRC collects the VAT. |
| USA, Canada Delivery Time: 5-10 Days | – 14.99USD for orders below 299USD- FREE shipping for orders over 299USD | NO Customs Fees for orders up to 800USD – charged by the USA Customs Office | No VAT charge. |
| Australia Delivery Time: 5-14 Days | – 19.99USD for orders below 399USD- FREE shipping for orders over 399USD | No info available – refer to local regulations. | No VAT charge. |
| Switzerland Delivery Time: 3-7 Days | – 14.99USD for orders below 299USD- FREE shipping for orders over 299USD | No info available – refer to local regulations. | No VAT charge. |
| Norway Delivery Time: 3-7 Days | – 14.99USD for orders below 299USD- FREE shipping for orders over 299USD | No info available – refer to local regulations. | No VAT charge. |
| Russia, Ukraine, Belarus – NOT AVAILABLE | NOT AVAILABLE | NOT AVAILABLE | NOT AVAILABLE |
| Worldwide destinations Delivery Time: 3-14 Days | – 29.99USD | Refer to local regulations. | No VAT charge. |
EU Customers
The EU Customers will not pay any extra customs fees.
Business customers with valid EU VAT number will not pay the VAT tax.
Please enter your EU VAT Number at the checkout, and the VAT will be deducted from the Total Payment. The VAT number is automatically checked in the VIES database.
For personal orders from the EU, the VAT will be added at the checkout.
UK Custmers
We ship directly to United Kingdom.
UK VAT tax is collected by HRMC
Non-EU Customers
Customers from outside the EU purchase the items with no VAT.
Please select the destination country, and the VAT will be removed automatically.
If the VAT is not removed, please email customer service via the contact form, and a custom invoice will be issued.
USA and Canada
Orders from the USA below 800USD are FREE from customs tax.
We ship directly to USA and Canada
Payment Options:
You can pay for your order with any Credit Card and Apple Pay!
7 Days Return Policy
If the item is damaged during the transport, we will do our best to help you and provide the replacement product.
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