EQ550P | PASSIVE VALVE 2 BANDS EQ

US$299

500 Units 2 4 6+
Discount -10% -15% -20%

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EQ550P | PASSIVE VALVE 2 BANDS EQ

Stereo Buss Operation

1
Create Sophisticated EQ Curves!

The unique feature of Passive Equalizer is the ability to Cut and Boost at the same time.

The EQ550P can create sophisticated EQ curves which cannot be achieved by the active shelf equalizers.

The ability to select three different frequencies independently for Cut and Boost provides countless possibilities in creating custom EQ curves.

The plots below show a few examples of such EQ curves.

2
Standard Cut and Boost Curves

Like any other equalizer, the EQ550P can be used to cut or boost the shelf frequencies.

The plots below show the maximum cut and boost for each band and frequency settings.

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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 interferences (50Hz Hum, RF Smog) and the frequency response dependents on load and source impedance, negatively influencing the overall performance of analogue studio equipment.

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.

EQ550P Demo Videos

The demo video presenting the older version of the EQ550P with a Silver front panels.

The current Black front panel version is delivers the same performance as the units presented in the video.

All videos are server hosted to insure the best quality of sound without the YouTube compression or normalization.

Play Video
Play Video
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EQ550P Specification
  
Input Type / Input ImpedanceBalanced Electronic20k
Output Type / Output ImpedanceBalanced HRK Active TransformerLess than 10R
Initial Gain0dBAll controls set to flat response
Max Output Level+25dBu@1%THDBalanced Signal
Power Consumption180mA max. 
FormatAPI 500 Format 
Phase ReverseNo0 deg.
Static Noise-89dBu@10Hz-22kHzAll controls set to flat response
Thermionic ValveNOS Dual TriodeHigh Quality NOS Selected Tube

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

All Items are dispatched from Poland in the European Union within 1-3 working days.

Country / RegionShipping CostCustoms FeeVAT
All 27 European Union Countries Delivery Time: 2-7 Days– 14.99USD for orders below 299USD- FREE shipping for orders over 299USDNO 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 299USDNO Customs FeesNo VAT charge. HMRC collects the VAT.
USA, Canada Delivery Time: 5-10 Days– 14.99USD for orders below 299USD- FREE shipping for orders over 299USDNO Customs Fees for orders up to 800USD – charged by the USA Customs OfficeNo VAT charge.
Australia Delivery Time: 5-14 Days– 19.99USD for orders below 399USD- FREE shipping for orders over 399USDNo 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 299USDNo 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 299USDNo info available – refer to local regulations.No VAT charge.
Russia, Ukraine, Belarus – NOT AVAILABLENOT AVAILABLENOT AVAILABLENOT AVAILABLE
Worldwide destinations Delivery Time: 3-14 Days– 29.99USDRefer 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

 
Our return policy is a part of the general Terms & Conditions, which you must acknowledge at the checkout. We stand for fair rules and a win-win approach.
We understand that our customers may wish to return the product, and we provide such an option.
 
However, because we are a small company, we can’t afford to run a grade B outlet shop like big distributors and providing the 30 days return period. We can’t also scrap every returned unit.
 
We could charge our customers more to offset the cost of the returns, and this is what major distributors do. Or we can keep our prices low and hope that our customers will appreciate our policy.
 
This is why we provide the 7 days test period after receiving the package with the ordered items. If you wish to return the item, we will accept the return request, providing that the item is not damaged.
 

If the item is damaged during the transport, we will do our best to help you and provide the replacement product.