US$269
- 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
- Easy to Use and Musical 2 Band EQ
- Two Discrete Germanium Transistors Opamps
- 41 Positions Stepped Potentiometers
- Adds HF Shine and Space to the Mix Sound Stage
- NOS Military Grade Germanium Transistors made in '60s
- Separate Discrete Opamp for each Band
- +/-12dB Boost and Cut
- 4 Frequency Settings for HF Band
- 4 Frequency Settings for LF Band
- Coupled with Custom HRK Active Transformer
- On-Board Voltage 500 Rack PSU Filters
- Direct Sale - Save 30% on Distributors Fee!
Ultrasmooth 2 Band Germanium Equalizer
The EQ552 is a user-friendly, two-band equalizer that uses vintage Germanium transistors for superior sound quality. It offers four frequency settings for each band, giving you plenty of options to fine-tune your music.
What sets the EQ552 apart is its use of separate Discrete Operational Amplifiers, made with high-quality, military-grade Germanium transistors from the 1960s. This ensures a smooth and natural sound, even at high boost levels, unlike some modern equalizers that can make your music sound harsh.
The EQ552 is versatile and works well with any music genre, as it doesn’t impose a specific tone character. It enhances the details in your music while preserving its original sound.
Each band in the EQ552 has its own circuit, preventing any interference between the bands and reducing phase issues. This feature makes the EQ552 perfect for stereo operation, tracking, 2-bus processing, and mastering.
With 41 stepped potentiometer positions, the EQ552 offers precision control, making it a great tool for any music enthusiast or professional.
EQ522 Review Video – HD Audio
Server hosted video – no YouTube sound compression.
Why Germanium Transistors Sound Good?
Firstly, germanium transistors are known for their warm, smooth, and vintage sound. They have a unique tonal characteristic that is often described as more “musical” compared to other types of transistors. This is due to the way germanium transistors handle signals, which results in a more pleasing harmonic distortion that many audio professionals and musicians find desirable.
Secondly, germanium transistors can operate at higher speeds and slew-rates than early silicon devices. This was an important consideration in the 1960s and is still relevant today in certain applications.
Lastly, the use of germanium transistors in studio equipment can be seen as a nod to the golden age of music production. Many classic sounds are associated with germanium-based products like EMI’s first solid-state TG mixers, Neve’s 1053 and contemporary modules, and some of the vintage Fairchild and Telefunken products.
EQ522 Demo and Introduction
Server hosted video – no YouTube sound compression.
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.
HRK Active Transformer
Bart Hrk has developed a proprietary design for an Active Transformer, aimed at addressing the limitations of traditional passive transformers.
Traditional passive transformers are known to be vulnerable to electromagnetic interference, such as 50/60Hz hum and HF RF smog. Additionally, their frequency response is contingent upon load and source impedance, which adversely affects the overall performance of analog studio equipment.
The HRK Active Transformer is a game changer that not only resolves the issues associated with passive transformers but also retains and amplifies the desired characteristics of the transformer output stage. This includes the enrichment of harmonic content and the enhancement of tonal response.
What sets the HRK Active Transformer apart is its ability to deliver the rich, beloved sound that audio enthusiasts seek, including the harmonic content and tonal response, while simultaneously eliminating the drawbacks of passive transformers.
Furthermore, the Active Transformer introduces a delicate “Air” effect and boasts an extended low-frequency (LF) performance, adding depth and clarity to the sound.
Another remarkable feature of the Active Transformer is its dynamic saturation, which is dependent on the output level. As the output signal level increases, the Active Transformer exhibits greater saturation, reminiscent of the warm and rich sound produced by classic studio equipment.
In summary, the HRK Active Transformer is an innovative solution that offers superior sound quality, eliminates electromagnetic interference, and enhances harmonic content and tonal response. It is an invaluable asset for professionals and audiophiles seeking to elevate their audio experience.
Specification
- Balanced Input – Impedance 20kΩ
- Balanced Active Transformer Output – Impedance less than 50Ω
- LF Frequency Setting – 160Hz, 90Hz, 60Hz, 45Hz
- HF Frequency Setting – 16kHz, 10kHz, 8kHz, 6kHz
- LF and HF boost/cut – +/-12dB
- Nominal Gain – Knobs set to 12 o’clock – 0dB
- Typical THD+N – Less than 0.02%@1k in 10Hz-22kHz
- Noise Floor EQ Engaged – Less than -90dBu@10Hz-22kHz
- Bandwith at flat response – 10Hz – 60kHz@-1dB
- Maximum Output Level – +24dBu@0.1%THD
- Power Consuption – Less than 60mA
- Compatibile with any standard 500 Rack
All HRK Products are tested with the industry’s best audio measuring equipment – The Audio Precision
Audio Precision is an industry leader in providing high-quality audio testing equipment. They are renowned for their test systems’ precision, reliability, and versatility.
When testing studio audio devices, Audio Precision’s equipment can assess parameters like frequency response, harmonic distortion, intermodulation distortion, phase response, signal-to-noise ratio, and cross talk. In-depth and accurate testing allows the identification of even the smallest issues in audio quality, enabling corrections and improvements that can significantly elevate the overall product quality.
In conclusion, using Audio Precision test equipment is an excellent way to ensure that all HRK products are performing at their best, meeting the standards required for the Professional Studio Applications.
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.
- Spcial stereo coupling link cable is supplied with every pair of 500 Compressors
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 VAT Charge | HMRC collects the VAT or additional Fees if applicable. |
| 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, Japan, South Korea – Delivery Time: 5-14 Days | – 19.99USD for orders below 299USD – FREE shipping for orders over 299USD | There is 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 | There is 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 | There is no info available – refer to local regulations. | No VAT charge. |
| Russia, Belarus – NOT AVAILABLE | NOT AVAILABLE | NOT AVAILABLE | NOT AVAILABLE |
| Worldwide Destination Delivery Time: 3-14 Days | – 29.99USD | Refer to local regulations. | No VAT charge. |
EU Customers
EU Customers will not pay any extra customs fees.
Business customers with a valid EU VAT number will not have to pay VAT tax.
Please enter your EU VAT Number at 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, VAT will be added at 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 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 the USA and Canada
Payment Options:
You can pay for your order with any Credit Card or Apple Pay!
PayPal – We do not use PayPal as a payment method.
7 Days Return Policy
If the item is damaged during transport, we will do our best to help you and provide a replacement product.
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